Mountain Climbing With an i3 REx

Loveland Pass, Continental Divide, Colorado. Elevation 11,990 ft

A few weeks ago Don Parsons of Denver, Colorado took his i3 REx on a 128 mile road trip from his house to Loveland Pass (Continental Divide, Colorado). On his way up to the 11,990 ft elevation of Loveland Pass he stopped at Beau Jo's Pizza for lunch and to charge on their public ChargePoint EVSE where his i3 REx accepted 8.9kWh's of juice to help with the rest of the climb up the mountain. 

The car showed 18 miles remaining at the top of Loveland Pass, and he nearly made the trip entirely on electricity when 62 miles later the range extender kicked on and he was only 2 miles from his home. 

The trip summary: 
-64 miles each way
-8,960 feet of climbing, 2329 Feet of descending on way out
-2329 feet of climbing, 8,960 feet of descending on way back

Having heard about this Continental Divide conquest, I asked Don if he wanted to write a guest blog post about the trip, but he offered to do one better. His next challenge was to take his i3 REx up to the summit of Mt Evans which is the highest elevation paved road in the US. The trip would take him over 14,000 feet above sea level and would most certainly push the range extender beyond its limit. This was not the kind of road trip BMW envisioned people taking the car on when they designed the REx, but nonetheless they have to expect some people like Don would do just that. So what happened? Read Don's words below to find out:

I’ve had my BMW i3 REx for almost two months now and haven’t really used or tested the REx engine.  Before today, I’d driven about 1750 miles total with only about 10 miles using the engine.  I decided to drive from my house in Denver to the top of Mt. Evans and return without stopping for gas or topping off the charge.  Using the REx engine in the mountains can be tough because the output of the small engine can’t really put out enough power to go both highway speeds and climb uphill.  However, the road to the top of Mt. Evans is pretty narrow, has steep drop-offs, no guardrails and a lot of cyclists sharing the road so you really don’t want to go much faster than 35 mph.  For this reason, I thought the small engine could hopefully handle the climb.

For those that don’t know, Mt. Evans is the highest paved road in North America with an elevation of 14,130 feet above sea level!  I live in Denver which is at 5,280 feet above sea level.  It’s 63.5 miles from my house to the top Mt. Evans.  With some up and down hill climbing, the total ascent is 12,446 feet and the total descent is 3,686 getting to the summit.

I set the car into Eco Pro+ and set out on city streets of Denver, then I-70 west up the mountains to Idaho Springs.  Mt. Evans highway winds its way south from Idaho Springs to the Mt. Evans summit in 28 miles.  When I originally entered the destination into the navigation system, the guess-o-meter said 61 miles of range.  I tried to keep the cruise control set to about 5 miles over the speed limit.

I was surprised to find that the Rex engine didn’t turn on until about 52 miles into the drive (about 10 miles from the summit) with a total trip average mi/kWh of 2.8 when the REx kicked on.  However, about 1 minute after the REx turned on I got a Brake error message that ended up making the brake pedal feel stiff and pretty much unusable.  Fortunately, I was still heading uphill and the regen seemed to be working normally.

I could hear the engine speed up during the straight parts of the switchbacks and as I slowed down for the sharp curves, the engine almost immediately slowed down as well.  I never really wanted to travel faster than 35 mph so I didn’t notice any performance hit until near the summit.  On the last few switchbacks, I put my foot to the floor and couldn’t get the car to travel faster than 26 mph.  At close to 14,000 feet of elevation, the engine was probably severely limited from its usual output at sea-level.  I’ve heard people say that an ICE reduces power output by 5% for each 1,000 feet of elevation.  In any event no other cars were traveling any faster than 25 or 30 mph so I didn’t feel unsafe.

I finally made it to the top at 14,130 feet!  The temperature had gone from 68 degrees in Denver to 35 degrees and quite windy.  This road usually shuts down for the winter sometime in September so they will be expecting snow to start accumulating up there pretty soon!

As I was getting ready to head down, I was worried about whether I would have any use of the brakes since I had turned off the car and walked around the summit for about 5 minutes hoping the error would reset but it didn’t and I still had a stiff brake pedal.  Since it was 35 degrees up there, I was pretty cold and didn’t feel like waiting any longer so I thought I would start to head down and see how well the regen worked to keep the car in control.  You can imagine how happy I was to have such a high regen rate because I felt like I was in complete control all the way back home.

During the descent from the summit down to Idaho Springs I was excited to see that the regen had built up a full 25% of the battery SOC and the guess-o-meter said as high as 28 miles of range on the battery.  I drove home significantly on battery but the REx kicked in a few times where there was some climbing.  It also stayed on once I got out of the mountains but I was easily able to maintain 75 mph on the highway leading east back into the city.

Here's a screenshot of the elevation and speed of the whole trip

Some stats on the whole trip.  I traveled 127.6 miles and averaged 4.9 mi/kWh and average speed was a total of 39.6 mph.  I used a little over a quarter of the rex tank which I think is pretty minimal for traveling almost 130 miles! As you can see from the picture, the brake error was still in place when I arrived home.  However, after being on my EVSE for a little over an hour, everything was cleared out and a quick trip to grab lunch showed that everything was back to normal.

I should point out that I haven’t gotten any software updates yet as I haven’t been able to set aside the time.  Until this trip, the only error I’ve seen from the car is the Check Engine Light, which remains illuminated. There is a software update that will eliminate this waiting for me at my dealer, so I guess it's time to get the car into the shop for the updates.  Hopefully the brake error is related to the 12v battery issues that others have discussed and will also be fixed with the latest software version I'll be getting. 

When I thought about getting the i3 Rex, I figured that I would use the battery over 95% of my driving miles.  So far, it seems like I’m using the battery over 97% of my miles.  That said, I’m still happy to have the Rex as it completely takes away any range anxiety when I’m traveling in the flats of the front range of Colorado.

What about the mountains?  I was concerned about using the i3 REx in the mountains and still believe that having a REx hold mode similar to the European version of the i3 or the Chevy Volt would make this an even more enjoyable car in Colorado.  That said, a couple CCS fast chargers placed strategically off I-70 would go a long way to helping the issue.  Locations in Idaho Springs, Silverthorne (where the 8 Tesla Superchargers are located) Copper Mountain, and Vail would be ideal spots to get a quick top-off and be truly useful in the mountains.  I’ve also kept my 335xi for long distance ski trips since it has all wheel drive and is still a great car. However, even without the fast chargers I was able to make it to the summit and home without a problem.

I’m very happy with the the i3.  The performance, handling, smoothness, and quietness all contribute to a great experience.  Like others have said, it’s hard to go back to a regular internal combustion engine after experiencing electric!

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

The LA Auto Show: Driving Impressions & Details Learned

It's been a long time coming but I finally got to drive an i3. I've actually been getting tired of having journalists contact me and ask me for my opinion of it on the road compared to the MINI-E and ActiveE and having to tell them I haven't had the opportunity to drive one yet! So did it live up to my (high) expectations? Yes, it did. It's certainly not "the perfect EV," but in my opinion, it does do more things better than any other electric vehicle that costs less than $70,000. And yes, the $70,000 is the threshold mentioned because slightly above that, (actually $72,240) is the starting point before incentives, for the least expensive Model S you can buy in the US.

Lined up for test drives

Price is worth mentioning here because since the i3 has launched there have been endless comparisons between it and the Model S. My contention is that they are both excellent electric vehicles and while there will be inevitable comparisons and even some cross-shopping, they are really vastly different cars and if they weren't both electric would never be compared. The i3's base price is $42,275. That's $29,965 or about 40% less than a base Model S and that alone should end the need to compare them. However I feel it was important to touch on this because everybody else is. These are both excellent EVs, but they serve different masters. The one thing fascinating about the Model S is that it's such a great electric vehicle, that every other electric vehicle that comes along will now be compared to it, well done Tesla.

The back up camera video is extremely clear

In addition to my test drives I had the opportunity to sit down and interview just about every BMW representative there and I will do a future blog post dedicated to at least one of those interviews. However, here I'm going to focus on my thoughts on the driving experience and answering the many questions about the i3 I've received in the past few weeks in the form of comments, personal emails or posts on the BMW i3 Facebook page or in the BMW i3 forum, both of which I am the administrator of.

Tera World interior is all leather

BMW had fifty identical i3s at the LA Auto Show for test drives. They were all exactly the same color, had the 20" wheels, the top of the line Tera World interior and had every available option the i3 will offer. I later found out from BMW NA i3 product manager Jose Guerrero that these cars were actually the very first i3s to roll off the assembly line and that they were pre-production vehicles and European spec so they had to be updated with US charging ports, navigation software and other small modifications so they could be used here in the US for test drives. Also, after the LA Auto show these cars will gradually filter to dealers all over the US so depending on where you live your local BMW dealer may get one soon for demonstration and test drives.

What about the range extender?

Harb addresses the ActiveE drivers

Unfortunately none of the cars had range extenders so I can't answer many of the REx questions I've had like: "How quiet is it?  Can you feel the vibrations when it's on?  What MPG does it deliver?" I did learn some new details which I'll discuss later in the post though. I will say this though because the question of how robust the range extender is has been a common theme on every website that has an i3 discussion. At a private event on Thursday that BMW held for the ActiveE drivers that question was brought up and Jacob Harb, BMW's North American manager of sales and strategy for electric vehicles said he wanted to straighten out the confusion around a comment that a BMW representative once said, and that was that the REx wasn't meant for daily use. Jacob said you can certainly use it every day if you need to, but that BMW didn't envision the car being used by someone that has a 120 or 130 mile daily commute. The car could do it, but if your daily driving needs were this extensive then perhaps a different vehicle might be a better choice. He was then asked about taking it on a long drive and refilling the tank and continuing to drive. Again he said that BMW doesn't really envision people using the car like that all the time, but technically it's perfectly capable of doing so. He even said that technically speaking, you could drive an i3 from New York to LA simply by stopping for gas every 50 or 60 miles and refueling, and then qualified it by saying, "But I don't know why anybody would want to do that."  And personally I agree.

Driving in LA:

I stopped for quick photo op

I actually had the opportunity to drive the i3 twice, and do a ride along once so I probably spent a collective 20 miles in the car. I had a press pass so I registered for a press drive and then at the ActiveE event we were all allowed one test drive, plus I rode along when fellow Electronaut Todd Crook took his turn. On the first drive BMW handed me a course that they wanted the press to follow. It was basically a 3 mile loop that had you driving five blocks and turn right four times and you ended back where the ride originated from which was the Staples Center parking lot. You were alone, so you could of course vary from the course if you "got lost."  Being from New Jersey and never having driven in LA before I found it difficult staying on course and accidentally drove a little longer. It was pretty much what I expected it to be. Very quick, (we were told it does 0-60 in 7.0 seconds) very quiet (quieter than the ActiveE for sure), it has very responsive steering, an amazingly short turning radius and the braking was probably the best I've ever experienced. I practiced some emergency stops in a parking lot and the car stopped in exceptionally short distances. I can't wait to see official road tests when they measure braking distances. I predict it will deliver some of the shortest braking distances of any car on the road today.

The optional wide nav screen looks great

I really didn't get the chance to push the handling because of the LA city environment but I did have some fun weaving in and out of traffic, sprinting from streetlight to streetlight and mashing the accelerator to the floor at every opportunity. I don't know how it will do auto crossing (yet), but I give it an A+ for making the most fun you can out of city driving. I even tried out the Parking Assistant and it worked perfectly. I also purposely hit every pothole there was - and incidentally LA doesn't have nearly as many of them as we do in New York, and the car absorbed them without a problem and I didn't hear any unusual rattles or noises that I've read a few other journalists report when driving over bumps. The regenerative braking was about 10% weaker than it is on the ActiveE, but it's still by far the strongest regenerative braking on any electric vehicle. I'd say the Volt in low driving mode and the Model S are tied for 2nd, but the i3 has stayed true to BMW's promise of having the strongest regen in the industry which really allows for "one pedal driving." Like on the ActiveE there is what BMW calls a glide mode (basically the ability to coast to improve efficiency). By slightly easing back on the accelerator, the motor decouples and the car freewheels. While this isn't what you would normally need in a city driving environment, it will come in handy at higher speeds on the freeway. By easing back a bit more on the accelerator the motor then reengages and the regenerative braking grabs. 

Lift the armrest & you can slide across

The seats were comfortable and supportive and felt like they would do fine holding you in place during spirited driving but definitely don't grab you into place like seats in a sports car would. This, plus the lack of a center tunnel on the floor does allow you to easily slide across to the other side of the car and exit out of the passenger side if you wanted to, which I did just to see how easy it would be. The back seats have plenty of room for two big adults. I even brought along three passengers on my second test drive to see how we all fit and if the extra 600+ lbs would effect the driving dynamics. The car was slightly slower as you would expect but the handling felt just as good as when I was driving alone but again, I couldn't push it much on the streets of LA but I did make some rapid lane changes at about 40 mph and the car felt precise and planted even with the full load. 

What was learned: 

As I mentioned above I've had a lot of people ask me i3 questions recently and I promised I'd do my best to get answers once I drove the car and had the opportunity to speak to the program managers again. Without listing the specific questions here the answers to most of what I've been asked:


-The range extender engine is liquid cooled, but it's a different system and coolant than what is used for the battery management system. In fact, the i3 REx has three separate cooling systems. One for the BMS, one for the passenger cabin and one for the REx engine. The battery pack uses air conditioning refrigerant and the REx engine uses conventional liquid coolant.

-Waste heat from the REx is not used to heat the cabin.

-In the US the heat pump is standard on all BEV i3s, but it's not available on the i3 REx. BMW doesn't believe it's a necessary option if you have the range extender.

-Yes, you can certainly precondition the cabin (heat or cool) and the battery even if you have the REx. (Two people from the UK asked me this so evidently there is inaccurate info somewhere there)

-European delivery will not be offered on the i3.

-There are no optional interior color choices. Each interior level only comes in the color shown. So you can't for instance get the Terra World with gray interior, it only is available in the brown leather like the pictures shown above.

-The REx does not turn on until the state of charge is under 5%. It is robust enough to maintain the charge under all but the most strenuous conditions. You can manually shut it off so it doesn't turn on at all for instances when you know you'll make your destination on battery alone. If you do so it resets once you turn the car off and on again. This way you can't forget you shut the REx off.

-The REx has start/stop technology and shuts off when you are driving under 10mph unless the SOC is so low that it needs to stay on to get the car to 5% SOC. This is so that the car remains quiet at low speeds and while parked. This means you can't park the car with the REx on and let it charge up for a while.

-There is no speed limiter when the REx is running, but there is when you choose Eco Pro+ mode. In Eco Pro+ mode you are limited to 56 mph. Jose Guererro showed the ActiveE group a picture of the speedometer he took while driving an i3 with the REx running and he was going about 70-75mph (I don't remember exactly) he also said the car was maintaining the charge without a problem at that speed.

*UPDATE: The US i3's will not be speed limited in Eco Pro+ mode like I wrote above. The European i3's are though, and the car I drove was a European spec i3, so when I put it in Eco Pro+ mode the speed restriction display showed, which is why I reported it as such.

-Heated seats are optional, and this was a bit of a head scratcher: You can't precondition the passenger cabin with heat unless you get the seat heater option. I don't get that at all, but that's the way it is. Anyone who lives in an area that has cold temperatures during the year simply must get the heated seats option in my opinion or they will regret it later.

-The rear seats fold down completely flat and split 50/50. 

-Comfort Access is standard with Giga and Terra World trim packages, as is the sunroof.

-The battery pack is comprised of 8 modules which each have 12 individual cells. The cells are supplied by Samsung but BMW assembles the modules in house.

-You have to get the Parking Assistant package to get the rear view camera, it's not a standalone option.

-US orders will begin in January, not in November as previously reported on InsideEVs.com

-i3s bound for the US will begin production in March, likely arrive in the US for delivery sometime in April.

I was also asked to take some specific pictures, here they are:

Taken by my friend Andre

There were 6 CCS quick chargers there

The display while DC fast charging

One battery module contains 12 cells

There is one more thing that I learned. For some reason, BMW has decided to omit a state of charge gauge. My head nearly exploded when I found this out. Both the MINI-E and ActiveE had state of charge meters and quite honestly it's all I use when I drive. I never use the predicted remaining miles, or the bar graph. I love the simplicity of a simply number, from 0 to 100% to tell me how much energy I have to work with. I am not alone either, when the other ActiveE drivers found out they were as shocked as I was. In fact we brought it up and protested so much the i3 management team promised they would revisit this. I'm going to dedicate my next blog post on this topic, because I don't want this post to be all about the SOC. Other than this topic, most everything else was extremely positive. The car drives as great as I had hoped it would and BMW announced to the ActiveE group that as a thank you for our participation, they would be making a special edition i3 that will only be available for us, and our cars will be some of the first i3s delivered to the US.  I hope I got to everyone's questions and requests. Please leave any other questions in the comment area and I'll answer them if I can.

DC Quick Charge: Better Than a Bigger Battery

A BMW i3 charges at the first public SAE CCS quick charge station open in the US. 

The first public DC quick charger in the US that uses the SAE-endorsed Combined Charging System (CCS) opened this week in San Diego, CA. It's located at the Fashion Valley Mall and uses a dual connector quick charger called a "Freedom Station" by EVgo.

The i3 will have a DC quick charge option that the customer can elect or pass on. The price has not been set yet but the speculation is it will cost somewhere between $750 and $1,000 extra. Having the option will allow you to recharge the car to 80% in about 20 minutes. This is an incredible advantage to have in an EV, since charging times are really what limit EVs like the i3 from being able to cover hundreds of miles without much inconvenience. Of course you can get an EV with a huge battery like the Tesla Model S which will allow you to drive a couple hundred miles between charges, but to be able to really cover long distances without much inconvenience, DC quick charge (or battery swap ability) is really needed. 

Standards War

SAE & CHAdeMO side by side

Tesla understands the absolute need for quick charging on pure electric vehicles and is rolling out their own network of DC quick chargers they call Superchargers. Since Tesla uses a proprietary connector nobody other than Tesla customers will be able to use their network. Nissan uses a different connector called CHAdeMO (short for CHArge de MOve or charge for moving) which was developed by Tempco (yeah, the power utility that runs the Fukushima nuclear power plant) for quick charging electric vehicles in Japan. When Nissan came out with the LEAF, the SAE hadn't yet endorsed a DC quick charge connector for the US so Nissan had no other option but to use the CHadeMO connector on the LEAF for quick charging, not that they wouldn't have anyway. Then, once the SAE endorsed the CCS connector, BMW, along with Audi, Chrysler, Daimler, Ford, GM, Porsche all agreed to use it on their plug in vehicles, when they eventually make them. I'm not going to go into why one is better than the other, or why some manufacturers chose one over the other here. There are plenty of articles on the internet that discuss this at nauseam; just do a simple search and you'll find them. I will say that I've talked with a few BMW engineers about this and they all basically told me there was no decision to be made. That the SAE CCS system is so technically superior to CHAdeMO, especially for future applications, that they wouldn't have even considered it. 

Personally, I really don't care which "standard" my EV has, as long as there are chargers out there for me to use. I've held both and even plugged both into cars and the SAE is a little lighter and less bulky and you only need a single charge port on the car so I tend to favor it, but honestly, I would be fine using CHAdeMO if there were chargers installed in my area and there aren't. At the i3 premier in July a BMW program manager asked me how much would I be willing to pay for the DC quick charge option. I suspect the price for the US market hadn't been finalized yet. My response was, "That depends" eliciting his curiosity. I followed it up by saying right now I won't pay a penny for a DC quick charge option because there are no chargers within driving distance of my home. However let's say there were a couple here and there in my general area, then I'd pay about $500 for it. And if there were a couple dozen of them in northern New Jersey I'd be willing to pay $1,000 for it. 

 
I know we are many years from having DC quick chargers in accessible, convenient locations like gas stations but I also believe that day will eventually come. The West Coast has a huge head start over the rest of the country and probably has as much as 70% of the Superchargers, ChadeMO and now CCS stations installed in the entire country. Plus, with the recent NRG settlement California will get 200 more DC quick charge stations, most being dual connector (CHAdeMO and CCS) units. Tesla currently has 24 Superchargers installed and an aggressive plan to cover the rest of the US in a few years. Nissan meanwhile has committed to installing hundreds of CHAdeMO stations in the US although they haven't delivered much on that promise yet. Outside of California's NRG settlement the future is unclear how and when we'll get the SAE CCS stations installed. Without any clear plan for the area you live in, I think it would be foolish to pay up to $1,000 for the option if you don't even know if you'll ever be able to use it. I have a friend that bought a LEAF in 2011 here in New Jersey and paid for the CHAdeMO option but nearly three years later he has never been able to use a CHAdeMO station because there are none within his range. 

I had the opportunity to talk with a BMW manager at the i3 premier about DC Quick charge infrastructure and one of the questions I asked was will the BMW i dealerships be required to install a DC quick charge station. I thought that would be a great way to at least begin the roll out of compatible DC quick chargers for the i3 so customers will at least have their local dealerships to fill up quickly at. They could also look for BMW i dealerships along the route of their long trips and since most dealerships are on highways, the locations would probably be good ones. Unfortunately that isn't going to happen. The dealers will not be required to install DC quick charge stations, but they will be "encouraged to." Personally I'd like to see BMW "encourage" them by offering to supply them with the DC charging station for free, as long as they pay to install, maintain it and have it available for use even when the dealership is closed. The dealerships will however be required to install multiple level 2 charging stations though which is a start, but really doesn't help out with longer road trips.

"Quick" Level 2 Charging

Is there such a thing as quick level 2 charging? While level 2 charging (240v) isn't necessarily quick, some cars do charge quicker than others. The Model S is the king (in the US at least) of L2 charging as it can charge at a rate of up to 20kW with optional dual onboard 10kW chargers. However the real L2 charging champ is only available in Europe. The Renault ZOE's onboard "Chameleon charger" can charge at up to 43kWs! On the other end of the spectrum is the Chevy Volt that is restricted to 3.3kW charging. However since the Volt has a much smaller battery than a Model S, it can actually fully charge in about the same time as a Model S can with it's massive 85kWh battery. The i3 will be able to charge at up to 7.4kW, and since it has only a 22kWh battery, it can fully charge in under 3 hours. This delivers a rate of about 30 miles of range per hour when charging from a 240v 30 amp level 2 charging station. That's a good improvement from my ActiveE, which returns only 15-18 miles of charge per hour. BMW is quick to point out how fast the i3's battery can be replenished while charging on L2, and while it is better than any non-Tesla EV here in the US, it still pales compared to the 80 miles of range you can get in 20 minutes on a DC quick charger.

Bigger battery vs DC quick charge 

The i3's 22kWh battery will allow for 80-100 miles or range in every day driving conditions, and up to 125 miles if the more efficient ECO-Pro+ driving mode is selected (Says BMW). So if range is so important, why not just slap a 40kWh battery in there and call it a day? The i3 would get about 200 miles of range and you wouldn't need quick charge, right? Wrong. Tesla uses enormous battery packs and they still realize they need a DC quick charge network to really make their electric cars viable to the broad public. Even with 200 to 300 mile range their customers want to be able to quickly recharge so they can drive long distances. The truth is, no matter how big your battery is and how far you can drive on a single charge, people will always want more range and quick charging. This is way BMW is offering the range extender on the i3. They know that it's going to take years for a comprehensive DC quick charge network to be built out, so until we have a robust infrastructure in place, the range extender will be a very popular option and will allow the owner to drive as far as they need on the few occasions they need to travel long distances. For daily use they won't use any gas, as the ~100 mile range should be more than enough for the vast majority of the time, yet they still have the flexibility of being able to cover hundreds of miles should the need arise. I believe the range extender becomes obsolete once we have adequate quick charge infrastructure in place. In fact, large Tesla-sized batteries won't be necessary either. Why carry the additional weight around and pay for a huge battery pack when you can use one half the size and just charge it quickly when the occasional need arises? The main reason EVs cost more than conventional powered vehicles is the cost of the battery pack. A smaller pack combined with readily available quick charge is clearly the way to go, however getting the infrastructure in place is the 800 lb gorilla in the room. It's not just going to happen without the support of the manufacturers. Tesla and Nissan seem to be doing their part, will BMW and the others that have signed up to use the SAE CCS standard do their part? Only time will tell.
 

The BMW EV infrastructure team was well represented at the grand opening event for the first public CCS quick charging station. Will they continue to be involved in assisting CCS station deployment, or wait by the sideline and watch?