The Norby's "Driving to Net Zero Energy Challenge" Starts off Strong!

My i3 is powered by electricity generated by my home solar array. EV+PV is really a fantastic combination and one that I believe will be fairly common in the near future.  So how can you possibly top that? How about by getting two i3s and powering both of them plus your entire household's energy use by your  solar array! That's exactly what the Norby's are attempting to do.

I have frequently written on my blogs how one of the best part of being in BMW's e-mobility test program for the past five years has been meeting and interacting with many of the other people in the program. Together we learned how to live with the issues that test cars frequently have, we built up our own support network and we simultaneously realized how fantastic driving electric was. It was a really a great experience and one that was nothing short of life changing for many of us. 

While I've literally made hundreds of acquaintances in the program, there are a few people who I've really connected with and now consider friends, and one of them is Peder Norby. Peder and his wife Julie live in Carlsbad, California and went from MINI-E to ActiveE to BMW i3, just like I did, only they went one step further and got two i3s! Like me, the Norby's power their electric cars with clean energy from their rooftop solar array. However even though our systems are about the same size, their array provides about 1/3 more energy than mine does because of the location (sunny Southern California) and orientation of the arrays. 

This year, Peder and Julie began a year-long net-zero energy challenge. They are attempting to live the entire year with their solar array providing all the energy they need to power their home and both of their cars. I believe this is a fantastic story and a glimpse into what the future has in store. Peder has been updating the progress on his i3 blog but now that he is one quarter of the way through the year, I asked him for permission to post his progress here and he happily agreed.  Below is a little introduction to what the Norby's are doing followed by the three month update. 

It’s hard to get this down to a sentence or two, but when we built our home in 2005,  our ethos was to partner with nature, harvesting the gifts of nature, building the most efficient home possible.

In doing this, we wanted to elevate, we refused to compromise or lower the enjoyment of our life and the caliber of our dwelling, we refused to reduce our life to living in a small cave with one solitary light bulb, solely for the sake of efficiency.

Our desire was to express ourselves artistically, with the highest quality materials, design and comfort in the size home needed to accommodate our family and friends, while partnering with nature, being as efficient as possible. We wanted to live in a net zero energy home, harvesting food and drink from our land. Not big or small, not right or wrong,  just our home.

The idea is a simple one: Harvest sunshine from the roof of your home to provide 100% of the power needed for your home and the two cars in the garage. That is our goal in this "Driving to Net Zero Challenge.

 

The 12 month documented journey began May 15, 2014. Three months in, things are looking pretty good:

Update Month Three. We're killing it!

The idea is a simple one, harvest endless sunshine from a small portion of a roof to provide 100% of the energy needed to power a home and two cars with zero utility cost, and zero gasoline cost.

Summary:

• 1/4 of the way through the year,  -167 kWh and a $468 credit.
• Stats, Stats, Graphs, Graphs. 
• We're killing it! Ready to make a projection!
• Our French import.

We estimate that we will be -$800 by Oct/Nov

Solar PV production holding steady at 1326 kWh

Electricity use for the two BMW i3's rose to 478 kWh for the month

We have a credit of $315 for the first seven months of the year

1/4 of the way into our "Driving to Net Zero Energy" challenge and as they say in political election coverage:
"I am ready to make a projection and call this race"

We will be below zero in utility cost and gasoline cost providing the energy for our home and guest house, and the two cars in the garage driven a total of 24,000 miles a year.  In fact we are so far ahead we will accomplish this goal four months earlier than planed with the January 2015 true-up bill from our utility. 

Our natural gas cost for a year is $301.27

We estimate at the true-up bill that we will have a credit of $400 to $450 for our electrical use and a cost of natural gas of $301 for the year thus  -$100 to -$150 in total energy cost for the year.

How about total cost?

As I mentioned in my first post in May, an asterisk is required regarding the cost of energy as our utility does not let us carry over our electricity credit to our natural gas cost.  Essentially our valuable peak hour electricity that we do not consume will be a gift to our utility.  As the years go by we will most likely convert one or two of the natural gas appliances at the end of their useful life to electric in order to reduce the natural gas bill by using our excess electricity credit.

Where are we with energy usage and gasoline cost now compared to 2007 when we began this path to energy independence?

In 2007 our energy cost were:

$3,800 a year in electricity
$   300 a year in natural gas

$2,800 a year for Julie's Infinity G35 gasoline

$2,400 a year for my Volvo S60R gasoline

Total:    $9300 a year in energy cost.  ($792 per month)

This is not far off the statistical norm for a US family which uses an average of 11,000 kWh per year ($3,060 at SDG&E rates) and $2912 for gasoline according to the 2012 EPA statistics.

In 2014 our energy cost are:

$      0 a year in electricity*

$  300 a year in natural gas

$      0 a year in fuel cost for Julie's BMW i3

$      0 a year in fuel cost for my BMW i3

Total $300 a year in energy cost. ($25 per month) 

* we donate $450 worth of electricity back to SDG&E.

You can see how quickly that $9000 a year in energy cost savings will pay off a $30K Solar PV system, $15k in extra construction cost for a thick well insulated home, efficient appliances and led lights and $1000 for a EV charging station in the garage.  We have calculated from the installation in January of 2007 we reached the payoff point in April of 2012.

From April 2012 and for the next few decades, we will have essentially zero or de minimus cost for energy saving us $200k to 300K in energy cost with escalating utility and gasoline cost.

How about total usage?

Julie and I live normal lives, things come up and situations change. The interesting part of our Drive To Net Zero Energy challenge is that we are real people with a real life and not some demonstration house with nobody living in it.

We have been doing really great using a net total of -167 kWh of electricity (generation vs consumption) for the first three months of the challenge. We can extrapolate the prior four months of usage pre i'3s, assuming we had the efficient BMW i3's and the extra 1kw of solar pv production which would have saved us 225 kWh per month. We estimate that by May of next year we will be very close to a net of 0 total kWh used, +- 250 kWh per year which is a normal usage and weather variable.

The French Import.

I bet you thought it was a car :)

Julie and I have decided to make an impact on two young adults lives.  We are hosting through Rotary Youth Exchange, a 17 year old French student named Peroline for a one year exchange. By doing so, an American young man is traveling to France to begin his year as an exchange student in France living with Peroline's family.

Our household has now risen to four and the extra electricity that our 17 year old exchange student will use will most likely push us into the positive use territory.

Hosting a 17 year old young lady French exchange student for a year was not contemplated and is not a very good idea for the Drive To Net Zero Energy Challenge!

But life is life, unpredictable, wonderful and real.  We are very happy to have Peroline as part of our family for the next year and we're looking forward to driving her everywhere, using lots of electrons, to see the sights of our great nation.

Our goal remains Net Zero Energy usage as well as Net Zero Energy cost.
We'll see how the the next 3/4 of the year goes.

Imagine a better future and your participation in it.

Next Month:

• Charging stations and what's on the horizon.
• Our CHG emissions 
• Our version of GHG offsets

Thanks for reading and commenting.

(Past "Driving To Net Zero" articles on Peder's blog)

Energy Challenge Introductory Article

Mid Month Article: The Energy Grid

Update Month 1

Mid Month Article: Does your Gas Station Pay you to fill'er up?

Update Month 2

Bonus video:
Below is one part of a series of videos that Peder and I participated in. The video series is called "Wherever You Want to Go" and was produced by BMW back in 2011. BMW recruited Buzz Aldrin, Marissa Meyer, Robin Chase, Syd Mead, and many others to participate and Peder, Todd Crook and I were also chosen to because of our high level of participation in BMW's e-mobility program. The four-part series is available online and did a good job of opening the up a conversation about where we are going with regards to personal mobility. Take a look and see if you can spot Peder and me.  :)

 

BMW i3 REx vs Chevy Volt: My Take

The Challenge

Last week I was contacted by High Gear Media Senior Editor, John Voelcker and asked if I had interest in doing a head to head comparison piece between my i3 REx and a Chevy Volt. Green Car Reports contributor David Noland (who happens to own a Volt and a Model S) wanted to pit the Volt against an i3 REx and asked John to reach out to me and find out if I was up for it.

I liked the idea of swapping cars and driving side by side for a few hours and that met David's needs as well. David wanted to do an efficiency test and measure the miles per kWh's used driving 15 to 20 miles in a city environment, and then do the same thing at highway speeds of 65 to 75mph. Going in, David expected the i3 to be more efficient in the city driving test, but the Volt to be more efficient on the highway test where weight plays a lesser role and aerodynamics are more important. The i3 is tall, has a large front area and is a bit boxy compared to the Volt. This creates a much higher CdA which will lower the i3's efficiency at high speeds. Having driven my i3 for a while now, I knew it would be more efficient in the city cycle, but I figured it would probably tie the Volt on the highway leg of the test. My i3's life time efficiency so far is 4.5 miles per kWh and I do at least 50% of my driving at highway speeds.

David averaged 4.1 miles per kWh over a 46 mile drive at highway speeds. This was driving about 15 miles in charge depleting mode and another 31 miles with the range extender running.  The display only shows an average speed of 56.7mph, but much of the trip was done at 70+ mph

David was also very interested to find out how the range extender performed. In my opinion, the i3's range extender is largely misunderstood. Even months after the launch, few people really understand how it works, what it can and cannot do. It has been called everything from a "limp mode" to an "emergency use only" option, and quite honestly BMW hasn't done itself any favors by not fully explaining how it works and how to use it properly. I promised David he could drive it as he wished, and even purposefully overwhelm the REx by driving fast enough to use more energy than the range extender could produce, should he desire to do so. At one point he even asked if I minded if he did just that, but due to the other traffic we couldn't really sustain a speed much over 70mph for long and we were not going up and long, steep inclines so the REx was able to put out enough power to maintain the SOC between about 4% and 6%. In short, we couldn't overwhelm it without driving in a an unsafe manner.

Getting ready to take off from Nauna's Bella Casa in Montclair

There aren't many long climbs in my area and I've driven with the range extender on quite a bit. I haven't found any condition where it isn't perfectly capable of allowing me to drive as long as I needed to, including hundreds of miles if I really wanted. However I know the REx has its limits, unlike the Volt. I have heard stories of people not being able to maintain highway speeds as the car drops to 45 mph suddenly. That's a problem that BMW needs to address. I think they need to make a better effort to communicate to the customers what the limits are, and I also believe the customer needs to be cognizant of the limits and keep an eye on the SOC under high speed driving up long inclines. It's not a do-all-under-any-condition vehicle. The range extender has limits but I definitely believe that for the vast majority of people it will do just about anything they need. Also, since the i3's electric range is double that of the Volt, the range extender will be used much less, so it's reasonable to understand why it is less robust.

People are surprised when they see the i3 next to other EVs. It is larger than I believe many people think it is.

On the Road
 
I felt very comfortable behind the wheel of the Volt as I've driven many of them and have always liked the driving experience that they offer. However, this was the first time I've driven a Volt since getting my i3 REx three months and about 6,500 miles ago. The two cars definitely feel very different. The much heavier Volt absorbs road irregularities better and is quieter at high speeds, where the boxy i3 has noticeable wind noise. The i3 is much quicker, especially at higher speeds and has better braking and handling. The i3's steering is more direct and sensitive and the Volt's brakes seemed a little spongy or squishy compared to what I'm used to in the i3. The i3 is clearly more of a performance car, while the Volt offers a more supple, softer ride. The regenerative braking on the i3 is much stronger than the Volt's, even in Sport mode and low driving gear. I'm sure I would adjust to it if I had a Volt for awhile, but I just couldn't get myself to stop for traffic lights without needing to depress the friction brake pedal every time. I almost never use the friction brake pedal on my i3 unless it's an emergency situation where I need to slow down unexpectedly. I really love this on the i3, and haven't found any other EV to have a regen system that matches it. It's definitely one thing that BMW got right. I know the Volt blends regen with friction braking so I suspect most of the time I depressed the brake pedal I wasn't even using the friction brakes, but I've really grown fond of the one-pedal driving of my i3 that anything else now seems sub-standard.

The interior of the Volt

The interior of the i3

I found both cars comparable in seating comfort and room, with the Volt having a larger cargo area. Because the e-drive motor and range extender are under the deck behind the rear seats, the i3's cargo deck is higher, which cuts down on the cargo space, but it also doesn't have a tailgate lip so you can slide objects in and out without having to pick them up over the lip to remove them as is the case with the Volt, which my bad back appreciates. Personally I like the uncluttered, modern interior look of the i3 better, and the large center display probably is the nicest I've seen in any car besides the Model S. However the exterior styling of the i3 is definitely unconventional and I'm sure many people will say they like the look of the Volt better, but styling is subjective so I'm not really going to get too caught up appearance here. One thing I really do like in my i3 is how the absence of a center transmission tunnel (battery tunnel on the Volt) provides a much more open, spacious feel in the cockpit. In fact, this makes it quite easy to slide across from the drivers seat and exit from the passengers door if you want to.  

The Volt has a larger cargo capacity, but with the rear seats folded flat, the i3's cargo space is definitely adequate for my needs.

Efficiency

David really wanted to focus on the efficiency of the cars so we did roughly 15 miles of city driving, followed by 15 miles of highway driving at 60 -70 mph. There were a few occasions we got up to 75 or so to pass other vehicles but for the most part we drove in the middle lane and averaged a little under 70mph. In the city cycle the i3 averaged a 5 miles per kWh used compared to the Volts 4.5. The Volt did better than I expected in this part of the test though, which I am happy to report. On the highway test the i3 delivered  4 miles per kWh used and the Volt averaged 3.5 mi/kWh. David and I were both surprised that the i3 actually had a larger advantage on highway driving than it did in city driving, but was 14% on the highway. I suspect if we drove faster, and averaged over 70 mph, the Volt would have caught the i3 in efficiency. The test also isn't perfectly controlled, since David and I aren't the exact same drivers. However, we are both very experienced electric vehicle drivers, and understand perfectly well how to maximize efficiency with the use of regenerative braking and limiting jack-rabbit style take offs. We drove with the climate controls set to 72 degrees and the windows closed.

During the city driving test. I jumped out of the Volt at a red light to grab this picture.

Conclusions

Having had quite a bit of previous experience driving Volts, there were really no surprises for me. I have always liked the Volt, and nothing from this experience has changed that. It's a very capable extended range electric car that offers a good ride, decent performance and nice styling. It is a better choice for long range driving (over 200 miles) and definitely if you live in a mountainous area. I can't even count how many people I've recommended the Volt to; and many have stopped back to my restaurant weeks or months later to show me that they took my advice. With a starting price of $34,999 it's a really a great deal. The i3 REx on the other hand starts at $46,125 which is $11,000 more. Yes, you do get a more nicely optioned vehicle but it's very hard to ignore the $11,000 difference. If price is a big consideration then it's hard not to pocket the eleven grand and take home a Volt.

However buying a car isn't always a rational decision, and there are indeed emotions involved. If that weren't the case we'd all be driving $15,000 Honda Fits. There are a lot of reasons why the i3 REx is a better EV for me than the Volt. First off, I drive about 33,000 per year, and the 38 mile AER of the Volt would mean I'd be driving on gas about as much as I drove on electric. The i3 REx will allow me to drive on electric over 90% of the time. For me to increase that 100% I'd need to jump up to Model S-type range because the times I have needed the REx were usually 150 to 200 driving mile days and there are no other current production electric vehicles capable of doing that without using a robust DCQC network which doesn't yet exist in the Northast. Another consideration is the 3.3kW onboard charger that the Volt has. I'd find it very hard to buy any EV that was limited to 3.3kW charging. My i3 can actually charge faster from zero to full an a level 2 EVSE than a Volt can, yet it has twice the electric range. GM absolutely needs to upgrade the onboard charger to a minimum of 6.6kW for the next generation Volt in my opinion.

I've read many comments on various online forums regarding the size of the i3's gas tank and I can say I categorically disagree with the notion that the car needs a larger gas tank. In fact, I'd be fine with a smaller one. If you think you need a bigger gas tank on the i3, then what you really need is a Volt because you're buying it for a use that it's not really intended for. The i3 REx is fine for driving in range extender mode for short distances, and I think it's really a great car for trips up to 150 miles or so, but if you really need to frequently drive more than that, it just may not be the best fit. If you need to go further once a month or so, then sure that shouldn't be a problem as long as you don't mind the 2-3 minute stop to refill the tiny tank, but frequent long distance driving just isn't the car's best use.

I also put a big emphasis on the driving experience and the i3 is really a blast to drive. The Volt is fun in its own right, and it is certainly no slouch by any means, but the i3 is noticeably faster and has a much more direct steering feel. I also love the fact that the i3 is all carbon fiber reinforced plastic and aluminum, the open cockpit and simple dashboard with the large center display. It was indeed the better choice for me, but honestly, I would be very happy driving a Volt also, especially if I drove less than the 90 miles a day that I do now. I don't think you can lose with either of these extended range EVs. Just pick the one that fits your budget, needs and desires and you'll be happy with whichever you choose.

You can read David's thoughts on his Green Car Reports article here.

BMW & Tesla Taking Different Approaches But Will Ultimately Face Off

Horatiu Boeriu of BMWBLOG recently did a piece titled "BMW vs. Tesla - Which Company Is A Bigger Innovator?" in which he mentions that while both companies are competing in the premium automobile segment and are committed to electric mobility, they are taking different paths to achieve success.

I'm not going to try to analyze who has it right or who is a bigger innovator, but it's clear that both companies have chosen to focus on different aspects of their respective vehicles. With Tesla, it's all about the batteries. Unlike every other automobile manufacturer, BMW included, Tesla's approach isn't for their electric cars to complement their lineup of gasoline and diesel offerings since they don't have any. Instead, it is to render gasoline vehicles from their competitors obsolete. In order to do so, their cars have to be at least as good or better than most features of competing gas cars; and that includes range, performance and utility. BMW on the other hand doesn't need to necessarily worry about making everything better. They can focus on specific needs of certain customers and make a vehicle that is better than any other at a specific set of tasks, without cannibalizing sales of other vehicles in their lineup. If you accept that premise, it's not difficult to understand why we have the Model S and the BMW i3.

Tesla knew they had to knock it out of the park with their first high volume vehicle offering. They knew they had to offer a car that could stand its ground against all of the top luxury sedans while offering a range long enough to allow for road trips enabled by the Supercharger network. Even though that was an enormous task, and one that few automotive analysts really believed they would pull off, they did just that and the Model S is a smashing success. No disrespect to the sexy styling or the fabulous performance of Model S, but the heart and soul of what the car is can be attributed to the enormous battery pack it uses, filled with industry leading, high energy-density batteries. Tesla is all about the batteries. Even though the Model S uses batteries that have a higher energy density than any other EV manufacturer, they still aren't satisfied. They aren't waiting for the market to bring them better, cheaper cells for their future cars. Instead they are in the process of building what will be the first of many Gigafactories, which will be the largest lithium ion battery manufacturing plants in the world. This will drive down costs, guarantee that they have the supply that they need, and allow them to constantly upgrade to better cells without needing to wait for battery manufacturers to retool production facilities to produce them. The key to Tesla's success is having the best batteries available, and to manufacture them for less than what their competitors are paying for comparable cells. It's the only way to offer large battery, long range electric vehicles and be able to price them competitively.  It's Tesla's edge, and perhaps their only hope to compete and actually beat the large, established automakers.

BMW's not in the battery business and is unlikely to follow Tesla's path as such. As mentioned above, since they didn't need the i3 to do everything better than any other gas offering as the Model S had to, BMW could focus on a specific set of goals with their first electric vehicle. The i3's code name was the Megacity Vehicle and the goal was to develop a car that would be the perfect electric vehicle for the increasing populations within the megacities of the world. They also wanted this car to represent a departure from traditional manufacturing processes with an emphasis on sustainability.  They set out to make the most efficient production car available today and they achieved that goal. The extensive use of carbon fiber reinforced plastic and aluminum allowed BMW to shave 400 to 500 lbs off the car which played a primary role in its efficiency.

Will BMW leave Tesla in their rear view camera? That doesn't look very likely at present.

I believe the i3 is as much of a learning experience for BMW as it is their first electric vehicle. Every step of the manufacturing process was rethought and redesigned for the i3. In fact, the i3 uses 70% less water and 50% less electricity to manufacture than a comparable-sized conventional BMW would. In addition, the Leipzig manufacturing plant where the i3 is made is now completely powered by wind-generated energy. So as much as the i3 is an important vehicle to BMW today, the lessons learned bringing it to market today will pay dividends when future i cars are made. The i3 indeed paved the way for the rumored i5 and other models from the i brand. You can expect larger battery, longer range electric cars from BMW i in the not-so-distant future. I suspect by the time Tesla releases the Model III, BMW will have an electric offering which is comparable size, range and price, and that will be good news for the consumer.

My i3 had a visit by its big brother. I'm one of the few lucky people outside of some select journalists who have driven an i8 on public roads. The future is definitely looking electric!

BMW knows that by focusing on a specific set of needs (efficiency, performance, sustainability) rather than long range, the i3 isn't as well suited for road trips as the Model S. They knew that every kWh of battery that they added would sacrifice efficiency and increase the cost of the car. I still maintain that if BMW had indeed used a slightly larger battery and delivered a true 100-mile EV, it would have been much better received, but that's a pointless argument now. While it does have a shorter range, the i3 does have features that are not even available in the Model S, such as adaptive cruise control, collision avoidance with automatic braking and self parking. As you would expect from BMW, the i3 is an extremely fun car to drive, and a great addition to the current lineup of EV offerings. I think it fits in well situated directly between the Model S and the LEAF in price.

My i3 at home

BMW did realize some customers would want a longer range so they offered the range extender as an option. It's really a great option to have and while I personally like how well it works, it isn't for everybody. Many have argued that the REx ruins the purity of an EV, and while I can agree with that, I can't agree that it shouldn't be an option. If such a feature allows more people to buy a plug in car, then I think that's great. I see the range extender as a temporary fix until batteries get better, lighter and cheaper, but a necessary evil at present. Obviously BMW agrees with that and unlike Tesla, they will wait for the market to bring them improved battery tech while Tesla has decided to bring improved battery tech to the market. Different approaches, different cars and I don't think either is right or wrong. They are both working on bringing cutting edge technology to market today with the promise of even better things to come. BMW and Tesla aren't going head to head in the EV space right now, but they certainly will. Competition is good because it forces innovation. Maybe Horatiu was onto something after all.

One last point: If Nissan does deliver on the rumors that the next generation, 2016 LEAF will have a 150+ mile range, and they can deliver it for a reasonable price, then both Tesla and BMW should be concerned, very concerned...

BMW and Tesla going nose to nose in the premium electric vehicle market is inevitable.

BMW i Announces New DC Quick Charger and It's a Potential Game Changer

The very first public display of the new BMW i DC quick charger

BMW stole the show today at the start of Plug-in 2014 in San Jose, California by not only announcing a new DC quick charger that will charge an i3 to 80% in 30 minutes, but also by saying the use of these chargers will be free for i3 users through the end of 2015. 

This is a huge step forward for BMW i and the EV movement in general. I have consistently contended that the mass adoption of electric vehicles will hinge on the deployment of rapid charging. Even though the majority of charging will be at a slower rate and overnight, for EVs to really be taken seriously by the masses they need to be capable of refueling in less than an hour while making longer journeys. Tesla and Nissan have already demonstrated that they understand this and have made significant investments in DC quick charge infrastructure, and today's announcement from BMW is proof that BMW also realizes this and appears ready and willing to jump into the DC quick charge game.  

The new BMW i 24kW DC quick charger

The interesting thing about BMW's approach is that they didn't just use existing DCQC equipment. Instead, they took a different approach working with Bosch to create an entirely new type of DCQC that is specifically tailored to suit the needs of their car, the i3. One of the barriers to installing DC quick chargers is the cost of bringing the high voltage service to the location.  By limiting the draw to 24kW's the site won't incur the sometimes-astronomical utility demand fees which can make DC Fast charging cost as much as filling up a car with gas. BMW has worked with utilities to agree on a level of supply which would avoid these high demand charges. 

So if these DC quick chargers only supply 24 kW's that must mean they charge the cars much slower than a conventional 50kW DC quick charger, right? Wrong. This is what I meant about these being tailored for the i3. The i3's relatively small battery can't really utilize a higher rate than 24kW effectively. All DC Quick chargers taper off to a lower charge rate once they get close to fully charging the battery to prevent overcharging and damaging the cells. The i3 only has a usable battery capacity of 18.8kW's so on a 50kW quick charger it only will charge at the full rate for about 10 minutes before it starts ramping down to a lower charge rate. In fact, BMW claims the i3 will charge to 80% in about 25 minutes on a 50kW DC quick charger. On this new 24kW unit, it only takes about 5 minutes longer, charging to 80% SOC in 30 minutes. So for only an extra 5 minute penalty, you get:

1) A low-cost solution for DCQC. BMW will sell the unit to their partners for only $6,548 which is less than half as expensive as the least expensive 50kW CCS DC quick charger made by ABB. "Partners" include BMW dealerships, utilities and municipalities that want to provide this service. BMW hasn't decided on a regular retail cost for the units but they are willing to discuss it with interested parties.
2) The unit is small, measuring 31"(H) x 19" (W) x 12"(D) and only weighs about 125 lbs. It can even be pedestal or wall mounted, unlike any other DCQC on the market.
3) The sites won't have to pay the excessive demand charges for electricity. Instead it will be the regular  electric rate, allowing for a reasonable cost to be assessed for use of the charger. 

Even with all this great news, you'll notice the title reads that this is a "potential" game changer. As good as these units sound, they won't do any good if they aren't installed. It's already been announced that in California the NRG eVgo DC Fast Charging network will deploy a minimum of 100 BMW i3 compatible DC Fast Chargers, but what about the rest of the country? Will BMW step up and prove they are "all in" like Nissan and Tesla have and assist (yes that means subsidize) the deployment of these quick charge stations in other markets? Only time will tell, but I have to say I like what I'm seeing so far. Let's keep the ball rolling BMW.

Specifications for the new DCQC unit

Below is the full press release from BMW:
 
San Jose, CA/Woodcliff Lake, NJ – July 28, 2014… At Plug-In 2014, a conference dedicated to discussing key issues for the long-term success of electric vehicles, BMW of North America launched its BMW i DC Fast Chargers which can charge the BMW i3 all-electric vehicle’s battery up to 80 percent in 30 minutes. A joint development between BMW and Bosch Automotive Service Solutions, BMW i DC Fast Chargers will change the face of public charging as the first compact and affordable DC Combo fast charger. The first BMW i DC Fast Charger will be on display at Plug-In 2014 on July 28 at the San Jose Convention Center. BMW also announced its new ChargeNow DC Fast program in cooperation with NRG eVgo, in which BMW i3 drivers in California can enjoy no cost unlimited 30 minute DC fast charging, at NRG eVgo Freedom Station® sites equipped with DC Combo Fast Charging, through 2015.

Introducing the BMW i DC Fast Charger
Conventional DC fast chargers are about the size of a standard refrigerator, cost tens of thousands of dollars and require a significant amount of electricity. Half the size of a traditional electric vehicle DC charger – measuring 31”H x 19”W x 12”D and weighing approximately 100 pounds – BMW i DC Fast Chargers can be mounted on a wall, a first for electric vehicle DC fast chargers. In addition, BMW i DC Fast Chargers will be priced significantly less than other DC Combo chargers in the market at $6,548 for authorized BMW partners.

“This is a milestone in the development of the DC fast charging infrastructure. With more than five years of real world experience, we understand that a robust network of publicly available DC Combo Fast Chargers is a key part of the mobility of tomorrow,” said Robert Healey, EV Infrastructure Manager, at BMW of North America. “BMW is offering the BMW i DC Fast Charger at an appealing price point, and more manageable size, to make the convenience of DC fast charging more accessible for BMW i3 owners.”

The 24 kW DC Fast Charger feeds the current directly to the vehicle’s battery, resulting in a more efficient and faster charge. BMW i DC Fast Chargers use the SAE Combo 1 connector, the North American automotive industry standard for fast charging; feature a rugged aluminum IP54 enclosure; meet NEMA 3 requirements; and are designed to perform in extreme weather conditions, from -40°F to 185°F. Additionally, the BMW i DC Fast Charger is ChargePoint network-enabled, allowing electric vehicle drivers with the SAE Combo 1 inlet to access the BMW i DC Fast Charger using a ChargePoint or ChargeNow card. Major automakers including BMW, GM, Ford, Chrysler, Daimler, Volkswagen, Audi and Porsche have committed to adopting the SAE Combo 1 inlet for DC charging. The BMW i DC Fast Chargers will be available for BMW i Centers across the U.S. beginning in August.

Introducing ChargeNow DC Fast for BMW i3 Drivers
In keeping with its holistic approach to making DC fast charging more accessible and, in turn, increasing the adoption of electric vehicles, BMW, in cooperation with NRG eVgo, will offer no cost charging to BMW i3 drivers at participating eVgo Freedom Station sites equipped with DC Combo Fast Charging in California through 2015.

Using their ChargeNow cards, BMW i3 drivers will have access to unlimited 30-minute DC fast charging sessions with the ChargeNow DC Fast program. BMW i3 owners can sign up easily for ChargeNow DC Fast at chargenow.com/us. In order to receive the full benefits of the program, BMW i3 drivers must use the ChargeNow card, provided with their BMW i3, to charge the vehicle at least once by December 31, 2014, at a participating eVgo Freedom Station. By doing so, BMW i3 drivers will enjoy continued access to no cost DC charging sessions through the end of 2015. Eligible BMW i3 vehicles must be equipped with the DC Fast Charging option (SAE).

“We’re confident the rapidly-expanding NRG eVgo DC Fast Charging network will provide significant benefits to BMW i3 drivers in California,” continued Mr. Healey. “With the cooperation between ChargePoint and NRG eVgo, ChargeNow DC Fast brings us closer to the reality of one card, one account public charging network interoperability.” eVgo will deploy a minimum of 100 BMW i3 compatible DC Fast Chargers across California to support the ChargeNow DC Fast Program.

“This is a milestone in the development of the DC fast charging infrastructure. With more than five years of real world experience, we understand that a robust network of publicly available DC Combo Fast Chargers is a key part of the mobility of tomorrow,” said Robert Healey, EV Infrastructure Manager, at BMW of North America. “BMW is offering the BMW i DC Fast Charger at an appealing price point, and more manageable size, to make the convenience of DC fast charging more accessible for BMW i3 owners.” - See more at: http://www.longtailpipe.com/2014/07/bmw-shows-smallest-and-lowest-cost-dc.html?utm_source=dlvr.it&utm_medium=facebook#sthash.B9P4jL3V.dpuf

“This is a milestone in the development of the DC fast charging infrastructure. With more than five years of real world experience, we understand that a robust network of publicly available DC Combo Fast Chargers is a key part of the mobility of tomorrow,” said Robert Healey, EV Infrastructure Manager, at BMW of North America. “BMW is offering the BMW i DC Fast Charger at an appealing price point, and more manageable size, to make the convenience of DC fast charging more accessible for BMW i3 owners.” - See more at: http://www.longtailpipe.com/2014/07/bmw-shows-smallest-and-lowest-cost-dc.html?utm_source=dlvr.it&utm_medium=facebook#sthash.B9P4jL3V.dpuf

BMW and Daimler Collaborate on Inductive Charging System For Future EVs

BMW's inductive charging system uses two electromagnetic coils. One attached under the vehicle and the other one is located underneath the car. BMW is using some retired ActiveE's for the test fleet.

Will the next generation BMW i3 have a wireless charging option? That appears very possible with the announcement that BMW is working with rival Daimler on developing an inductive charging system for their electric vehicles.

This follows a recent announcement from Toyota that the next generation plug in Prius would have wireless inductive charging available. Toyota is using technology from Massachusetts-based WiTricity for their system. It's unclear if BMW is also working with WiTricity or if they and Daimler are developing the system on their own.

The two things about inductive charging that have always made me question its viability are the charging losses incurred and the rate of charging. I'm just not willing to pay a 10% premium on my energy just so I don't have to take a couple seconds to plug in my car. Wireless charging will never be quite as efficient as conductive charging, but the technology does seem to be getting better. BMW claims the system they are developing is better than 90% efficient so that's good news. Personally I'd like to see it get closer to 95% efficient though, which would make the energy loss a little more palatable. The charging speed is another issue. The system BMW is working on is limited to 3.6kW which is only half the rate of speed the i3 can charge at. BMW has said that they are working on improving the charge rate to 7kW which would be a great improvement, but would that then lower the efficiency?

Inductive charging for public locations makes sense.

Public EVSE has cables stolen

The issues I noted above with inductive charging are based on home charging where the majority of EV charging occurs. However when you consider public charging, I definitely can see the advantages a wireless charging system would have. For example, you wouldn't have to touch a dirty connector that may have been left lying on the ground. Plugging your EV in on a public chargepoint in the rain or snow can be challenging at times and inductive charging could definitely improve the experience. Inductive charging could also cut down on charger vandalism, as some clever thieves here in the US are beginning to realize they can cut the cables off public EVSE's and sell the copper for a quick profit. Even if it is less efficient, it's likely a better method for public charging, all things considered. The charging rate would have to be faster than 3.6kW though, as larger battery EVs simply need faster charging than that. Take for instance a Tesla Model S. Charging inductively at 3.6kW a typical Model S will only gain around 8 to10 miles of range per hour when you factor in the charging losses and that just isn't good enough to be useful in many circumstances. The more efficient i3 will get around 12 miles per hour charging inductively at 3.6kW which is better, but still not nearly as good as the ~25 miles of range per hour achievable on a conductive public EVSE charging at 7kW.

An answer to a problem that doesn't exist?

One of my home EVSEs

Getting back to home charging I really think a lot of the angst over plugging in at home is generated by people that have never owned a plug in vehicle. When I talk to potential EV owners, they frequently ask me questions about charging. They want to know if it's inconvenient, if I'm always thinking about when I have to plug in or if I forget to do so. Honestly, plugging in your car at home is so simple that it becomes something you do without even thinking about it. It takes all of about 5 seconds, and as long as you position your home EVSE in a convenient location in your garage most people will never have any problems plugging in. If you talk to other plug in car owners the vast majority of them will say the same thing. I really don't see me spending a lot of money for a home based inductive charging system, especially if it charges slower and has greater charging losses than my existing conductive system. I really think this is something that non-EV owners believe they would need, but once they actually get a plug in car they realize it's not necessary. I'm still open to the possibility of home inductive charging, but it has to be fast, efficient, and not cost much more than the existing conductive home charging equipment does. In other words, I believe we are still some years away before I have a system like this in my garage.

Independence Is Empowering. Go EV Now and Claim Yours!

Today's date is July 4th 2014, and here in the US the 4th of July is a national day of celebration. The 4th of July is "Independence Day" and is a federal holiday which commemorates the adoption of the Declaration of Independence on July 4, 1776, declaring our independence from the Kingdom of Great Britain. This was of course a great moment in America's history, and one worthy of celebration.

However for me, this date has had a dual meaning over the past five years. I too celebrate the birth of our great nation 238 years ago, but I also have a little extra to celebrate since 2009, because that's when I began driving electric.

My beloved MINI-E and me in 2009. You always remember your first...EV!

Merriam Webster defines independent as follows: "Not subject to control by others; Not requiring or relying on something else," so it's clear why this calendar day has been designated Independence Day in the US. 

I define my personal transportation energy independence as driving an electric car that is powered by sunlight which is captured on my rooftop solar array. Yes, I have a grid tied array and use net metering so I still rely on the utility to provide power when my array isn't producing. However the net benefit is I can drive as much as I want and I'm paying very little for the energy to power my home and drive my car. I am completely isolated from the extreme fluctuations of the cost of gasoline, and I'm not at the mercy of the supply chain of oil. Ask anyone who lives the EV + PV life and they'll tell you it's certainly an empowering feeling, and part of why electrics are indeed the vehicle of the future. 

Me and my second electric vehicle, the BMW ActiveE in 2012

So far I'm averaging a little over 4 miles per kWh in my i3. My solar array produces an average of about 30kWh's every day of the year. That's enough energy to power my i3 about 130 miles. Compare that to a gas car that gets 30mpg, (which is much higher than what the average car delivers) and it would need 4.3 gallons of gas to drive 120 miles. At today's gas prices that would cost about $16.00. Gas prices constantly fluctuate, and are very sensitive to any governmental instability in one of the main Oil Producing and Exporting Countries, but eventually they always go up. Conversely the sun will always be free, and electricity rates from the local utility are mostly stable. Sure, there was an initial investment for the solar array, but with my savings I'll be cash positive in about 8 years and the array's lifespan is about 30 years. 

In 2014 I'm now plugging my BMW i3 into the sun!

Plug into the sun!

So come join me in the electric revolution! Declare your independence from oil and grab a plug instead! There are many ways to generate electricity; many are from clean, renewable sources and some you can even do yourself. You can never make your own gasoline, it will never be clean, and you'll always be dependent on others to provide it to you. There are many reasons to go electric, but energy independence may just be my personal favorite. Have a happy and safe Independence Day everyone!

How Much Does it Cost to Charge an Electric Car?

There are many reasons for considering making an electric car the next car you buy or lease. Besides the many environmental benefits, the promise of energy security, the silky-smooth driving experience with instant torque available without delay and low maintenance, one of the best characteristics of electric vehicles is how little they cost to operate. I've covered this topic here before, but this is something that really needs to be driven home. While Electric cars are currently more expensive than their conventionally-powered counterparts, the total cost of ownership over time can certainly be less, and in some cases much less.

Just as with gasoline cars some EV's are more efficient than others, but the average EV needs about 30 kWh’s of electricity to power the vehicle for 100 miles. For example, the EPA rating for the Nissan LEAF is exactly 30 kWh’s per 100 miles. A Tesla Model S 60 is rated at a combined 35 kWh’s per 100 miles and uses a little more energy since it’s heavier and more powerful than a LEAF, while the Chevy Spark EV has a combined consumption rating of 28 kWh’s per 100 miles. The BMW i3’s EPA consumption ratings haven’t been announced yet, but since the i3 is likely to be wear the “most efficient EV” crown, I expect it to be rated somewhere around 26kWh’s per 100 miles. The consumption for all electric vehicles can be viewed at the US Department of Energy’s website: www.fueleconomy.gov

According to Researchers at the University of Michigan Transportation Research Institute, the sales-weighted average fuel economy of all new vehicles sold in the United States in 2013 was 24.8 mpg. The average cost for a gallon of regular gasoline in the US over the past three years was $3.53/gallon. By using 15,000 miles as the average amount of miles a person will drive in a year, the annual cost of gasoline for the average car will be $2,135 per year, using the average cost of gasoline from 2011 through 2013.

Electricity rates vary much more than gasoline across the country, but the cost is much more stable. Unlike with gasoline, there aren’t huge spikes in electricity rates if a refinery has a problem, and neither does the price skyrocket when there is political instability in one of the large oil producing countries as we have seen lately, since all of the electricity we use in America is domestically produced. The average cost of electricity in the US is 12 cents per kWh. Therefore the average person driving an average EV 15,000 miles per year pay about $540.00 per year to charge it. As mentioned, the cost of electricity can vary greatly depending on where you live, but in order to equal the price of the average gasoline car’s fuel costs, the price of electricity would have to be four times the national average, and cost 48 cents per kWh. Nowhere in the US does electricity cost even close to that much. So the average American would save roughly $1,600 per year in fuel alone, and that's if gasoline prices remain around $3.53 per gallon. Gasoline prices do frequently spike up and down, but in the long run they always goes up. Electricity costs do eventually increase also, but not nearly at the pace of gasoline. Plus with fewer moving parts, EV's cost much less to maintain. If you combine the fuel savings with the reduced maintenance costs, it's clear to see an EV will cost you much less in the long run, even if the vehicle costs a little more up front.

Another great thing about electric cars is that you can easily reduce your electric bill by $40 to $50 per month just by being more efficient, and therefore completely eliminate your transportation fuel cost! You really can't use less gasoline unless you drive less or buy a more efficient car, but you can reduce your electricity usage at home and still drive as much as you always have. Simple measures like a programmable thermostat and the use of compact florescent or LED light bulbs can make a big difference. In fact, five 100 watt light bulbs left on continuously for a year use nearly the same amount of energy as it takes to power an electric car 15,000 miles! Here's how: five 100 watt light bulbs use 500 watts per hour. In 24 hours they use 12,000 watts or 12kWh. In 365 days they use 4,380kWh’s. A typical EV that uses 30 kWh’s for every 100 miles will use 4,500 kWh’s to drive 15,000 miles. Simply by turning unnecessary lighting off at your home, you can drastically reduce or completely eliminate your annual transportation fuel cost. Try doing that with a gasser!

How Long Will it Take To Charge an i3?

The i3 will charge in about 3 hours on a standard level 2 supply.

Since installing public charging stations at my restaurant in Montclair NJ, I have conversations with EV-interested folks nearly every day. One of the most popular questions they seem to always ask is how long does an electric car take to charge?

I wish I could just give a quick answer, but it's just not that easy. Nearly every EV takes a different amount of time to charge since they have different size batteries and the also have different charging rates. Then you throw in three different levels of charging (120V, 240V & 480V DC quick charge) and there isn't even a single answer for every car. For instance if I said the i3 takes about 3 hours to charge I'd be correct. However I could also say it will charge to 80% in under a half hour (DC QC) as I could say it takes about 15 hours (simple 120V household outlet) to charge and I'd still be correct. So I try to quickly explain the different methods of charging and the fact that every car is different without totally confusing the person or making it sound so complicated that they are are turned off by it all. After all, getting gas may be expensive but let's face it, it's very easy to understand!

The size of the battery, the onboard charger and the supply provided will all work together to determine how long your EV will take to charge. The vast majority of the time most EV owners will charge their car they will do so on a 240V electric supply, so I'll focus on that here. One advantage "little battery" EV's like the i3 have is since they have a small battery, they will charge relatively quickly, provided they have robust onboard charging capabilities. The i3's standard 7.7kW charger will fully charge the battery in under three hours which is pretty good compared to the other EV's on the market. Only Tesla (9.6kW charging standard) and Renault (43kW Chameleon charger) offer an EV with a faster level 2 charging rate than the i3.

Miles Per Hour:

One way to condense the conversation about charging time is to simply say how many miles of range per hour of charging you get. The i3's small battery (18.8kWh usable) combined with its relatively fast onboard charger will allow you to gain about 30 miles of range for every hour you are plugged into a 240v 32 amp supply. This will be something I really welcome. My MINI-E could accept up to 12kW's and I would get about 30 miles per hour of charging. However after a recent BMW software tweak my ActiveE only gets about 15 miles of range per hour and it feels painfully slow, especially when I need to charge to get somewhere. I am
so looking forward to getting back to charging at 30 miles per hour when I get my i3. Being able to charge quickly on a standard level 2 supply is really helpful and once you've been able to do so you don't want to go to a slower charging rate. The car becomes imminently more usable when you can charge it quickly so I'm glad BMW is offering a pretty robust onboard charger. Now of course I wish it was a 9.6kW charger like Tesla uses, but that's just the part of me that is never satisfied speaking. In reality 7.7kW's is fine for a car with a 22kWh battery. It will charge twice as fast as my ActiveE and deliver about the same range, and that will really make the car much more versatile.