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The BMW i3 is anything but the average car. Not only is it BMWs first electric offering, it's also the only car available today that has an optional auxiliary power unit; the range extender. It's really unlike any car that's ever been available, and unsurprisingly, it's often misunderstood. Most people really don't understand how the range extender works; what it can do, and what its limits are. This is, unfortunately even true for many of the client advisers selling them! So getting information on how the  car works out there is very important. BMW has produced a series of videos that help to explain the i3. While very helpful to new owners, they don't go into too much of the technical details that many people are also interested in. The book is filled with graphs on charging, range, power, consumption, etc Enter BMW i3 owner and engineer, David Bricknell. Earlier in the year, David published a book called "Electric Vehicles and the BMW i3" that was ...

The "Hold state of charge" feature shown here on this i3 display is at the center of the recently filed lawsuit alleging the BMW i3 REx is unsafe to drive. Recently news has spread of a class action lawsuit filed in the state of California by MLG Automotive Law alleging that the BMW i3 REx is dangerous and "can result in a catastrophic situation for all those on the road." This, in my opinion, is grossly misleading. However in fairness, to say the vehicle can be driven like any other car while the range extender is in use is also grossly misleading. To understand the juxtaposition of those two statements takes some explanation. The truth is, the plaintiffs aren't making this up. What they are describing in the lawsuit is called "Reduced Power Mode" and it can happen under certain strenuous circumstances when the vehicle continues, for a prolonged period, to consume more power than the range extender can provide. In this post I'm going to attemp...

Donner Summit is the highest point along Interstate 80 in California at 7,228 feet elevation. Last week we heard from i3 REx owner John Higham in a post he wrote which detailed his thoughts on the i3's range extender restrictions for the North American market. John certainly didn't mince words and offered his reasoning why he believes the range extender on the i3 should have its artificial restrictions (which are in place to satisfy CARB), relaxed a bit. John also promised to do a road trip which would take him from the San Francisco Bay area up to the 7,228ft Donner Summit in Lake Tahoe and report on the range extender's performance under these strenuous conditions. Below are his findings. SF Bay to Tahoe by the Numbers, Part 2 Nailed it.  Well, nearly. In Part 1 of this post about all things REx, I declared that a US spec BMW i3 REx could not make the popular weekend getaway of Lake Tahoe from the San Francisco Bay area without being speed limited within 15 miles of Sacr...

John spending some time with the i3's carbon fiber big brother, the BMW i8 Below is a guest post from a fellow BMW ActiveE Electronaut who went on to get an i3 REx, just as I did. John and I have had quite a few discussions about the i3's range extender implementation for the North American market. In fact, he almost didn't get the car because of it. As you will read below, he's given a lot of thought to how BMW has implemented the REx to achieve the California Air Resource Board's BEVx designation and why he believes CARB should reconsider the strict requirements they have imposed. This will be the first part of his contribution here. Next week I'll publish the second part which will summarize his "SF Bay Area to Tahoe" road trip to see how the range extender fared on this strenuous, 7,000+ ft climb up to Donner Summit. ------------------------------------------------------------------------------------------   My name is John Higham and I was Born El...