More Range Extender Details Uncovered At BMW i Dealer Training

BMW has been hosting i3 training events to get their client advisers up to speed and ready to sell the car. I'm very happy to hear they are doing this because I was really beginning to get concerned that they wouldn't properly prepare their sales staff for this unique vehicle. I even dedicated a post a few months ago to this very topic. I've now talked to a few client advisers that have done the training and they reported that they did indeed get a lot of useful information which will help them service their clients.

The i3's tiny fuel tank is seen here at right in front of the battery pack in the center of the car.  This is where the heat pump is located and why you cannot get the heat pump if you have an i3 REx

This week the latest round of training sessions are being held up at BMW headquarters in Woodcliff Lake, NJ and details of what is being taught are starting to leak out from some of the client advisers that are there. A couple things of interest shared were details about the range extender the i3 will offer as an option.

First, it was learned that the range extender is automatically activated once the state of charge drops below 6.5%. At that moment, it turns on and it's function is to bring the state of charge back up to 6.5% and to maintain that level of charge. It will not charge the car much above 6.5%, and it will not run if the car is stopped, unless the state of charge is critically low. Therefore you can't it in a stationary i3 and wait for the state of charge to increase. I knew the automatic turn on point was around 5% to 6%, but now we have an exact level when it engages.

US i3 REx customers wish they had the European "hold" feature available

You cannot manually turn the range extender off. This is contrary to what I was told by an i3 product manager at the i3 debut in New York City last July. I remember asking this specific question by saying "What if I knew I'd make it home on electric, say I only had a mile or two to go and the REx was about to turn on, could I just turn it off so it's doesn't fire up?" I was told yes, there will be a setting that will allow you to turn it off before it engages, but that setting will reset once you turn the car off. The reason for that is so that the next time you get in the car you won't forget that you had turned off the REx and you may end up needing it. I would have definitely preferred to be able to turn it off manually, and honestly can't see why that isn't going to be allowed.

The range extender exhaust is tucked away under the car so you can't see the tailpipe unless you crawl underneath to look

We also found out that the client advisers have been told that while the range extender is in operation the speed of the car will be electronically limited to 70mph. I'm not buying that; I think they were misinformed. I really think there was a miscommunication on this one because I have had conversations with people at BMW that know a lot about this and even very recently they assured me that there isn't an electronically governed speed limit while the range extender is in operation. I believe the confusion about 70mph is based on the fact that 70mph is basically the top speed that the range extender can comfortably maintain the 6.5% state of charge at while driving on relatively flat ground. The people I've talked to in Europe that have i3's with the range extender say they can drive on the highway at just about 120 km/hr (75mph) and maintain the SOC, but anything higher and the SOC will gradually diminish. It's my contention that the people running the training sessions either aren't 100% clear on this, or they really meant for the client advisers to warn the customers that 70mph is really the fastest they should drive at if they need to drive for a long distance. In any event, I believe they got this one wrong and there isn't an electronic limit, we'll find out pretty soon since the US i3 launch should be in about two weeks.

The BMW i3 range extender is located next to the electric motor and power electronics, over the rear axle.

I saved the biggest news for last. It was learned that the US version of the i3 REx will have not have a 2.4 gallon gas tank as the European version does. Instead it will have only a 1.9 gallon gas tank. I'm going to pause for a moment to let everybody scream bloody murder now...... I know it's only half a gallon, but in the case of the i3, that just reduced the gas tank by 21%! For me this is a non-issue, but I know there are a lot of people that will not like this at all. 99% of the time I use the added range of the REx it will likely be for less than 40 miles. Yes, this does reduce the utility of long range trips even more, as you will now probably have to stop for gas every 40 or 50 miles. There was no reasons given for the smaller gas tank but as far as I can imagine, this comes down to one of two things. Since BMW wants needs the i3 REx to qualify as a BEVx and one of the qualifications of the BEVx is that the car has a smaller gasoline range than it does electric range, my thinking is that one of these two things led to the smaller gas tank:

1) The EPA rating for all electric range on the REx came out lower than they believed it would. If they used the 2.4 gallon gas tank, the gas range would be slightly longer than the all electric range, therefore causing it to be disqualified for the BEVx designation. The only simple way to make the gas range less than the electric range was to reduce the gas range by using a smaller gas tank.

2) The EPA rating for the MPG while in range extender mode came out higher than expected, creating the same problem cited above; a longer range in REx mode than in all electric mode. I've heard it gets anywhere from 36mpg to 46mpg from people driving REx's in Europe so this is a possibility. If the range extender got rated at 40mpg, and was using a 2.4 gallon gas tank, then the electric range would need to be 96 miles per charge, which is highly unlikely. If they cut the tank down to 1.9 gallons, then the electric range would only need to be greater than 79 miles per charge, which I believe is attainable, even considering that the REx version will have 6.5% less battery to use than the BEV i3 does, as this is held in reserve as a buffer.

So what do you think? Has any of these new revelations changed you mind about the REx?

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BMW i3 REx European Road Trip!

Back in February we featured Steven from The Netherlands as a Born Electric guest blogger. At the time he mentioned to me that he was planning a road trip with his i3 REx that would take him on a fantastic journey from The Netherlands through Germany and France to the final destination of Switzerland. The funny thing is, I almost was able to meet him along the trip because I was actually in Switzerland the week before he arrived and my wife and I even spent an afternoon at the same lake in Zurich you see pictured below! In any event, once I heard Steven was about to engage upon this 1,100 mile road trip I asked him if he wouldn't mind sharing the details here once he returns and he was kind enough to do so. I get a lot of questions about the range extender, and many people want to know if it is possible to take it on a long trip. This post doesn't answer every question, but it does give some insight into how the car will perform on sure an extended road trip. I haven't read any story of an i3 doing a road trip over 1,100 miles yet, so this may be the first account of such a journey.

Travelcompanion: i3

OK, so we have this i3. It was, and still is, marketed as a city slicker. The question arises: is BMW underestimating itself ?

To begin with the conclusion: yes and no. It will go outside the city and beyond, with quite an aplomb at that, but its driver needs some commitment and perseverance to get there. As stated by Tom elsewhere: it is not a go anywhere, do anything car. With a normal to brisk driving style, it excels on local trips with perhaps a charge or two along the way. But when taking it easy, tourist style, it can haul you much further than your cities limits.

Once you get used to its unconventional lines the design grows on you.
Our i3 in the Appenzeller mountains.

The commitment starts with a careful planning. Call me a nerd, but I rather like planning a trip in detail, time allowing. However, the limited electric range did cause a little frustration. Frustration about not being able to reach the higher alpine passes in the six days we reserved for this trip. When pushed, we certainly could have done it, but in the end we opted to make the journey itself the goal.

The first hurdle is Europe not being the United States of Europe. Different plugs, different chargecards, you name it. Totally unfunny. Luckily, one of Hollands energy suppliers is owned by RWE, a large German energy supplier, so we could apply for a German charge-ID. You’ll need an app on your iPhone to start the charger, but that’s ok. For France and Switzerland, we’re out of luck. A lot of local/regional initiatives, so charging possibilities are limited to free chargers or, in Switzerland, chargers mounted in parking garages where charging is complementary or at a cost, payable at the checkout machines. And these have to match our Mennekes plug as well.

As you’ll understand, planning took a while, especially while I was not only looking for locations to charge, but also for roads worth driving and places worth visiting while charging. Not much fun to be stuck on an industrial estate for three hours… In the end, I planned our trip so that it would take us three days to reach Switzerland, leaving much of the motorway behind after crossing the Dutch border. Slow tourism, like our parents did with their 2cv, before Europe was shrunk by the proliferation of the Autobahn.

Departure

Smoothly gliding away, to not disturb our neighbours, is uneventful in itself. EcoPro is on, but so is the heat, for it was freezing during the night. Damn, we’ll need those electrons! Well, not entirely, to be truthful, for our first stop is at a 50 KW fast charger. The residual charge doesn’t seem to matter much at the fast chargers’; it’ll charge to 90% in 30 minutes anyway. But there seems to be a catch. We left the charger with ~94%, but the charge dropped right down to 86% in a matter of minutes. Something we have observed more than once after a fast charge. A pity in this case, because the next station should have been reachable with a margin. A margin worth having, for we were able to reach our designated charger with only 5 km (3 mi) on the clock. But hey, it was supposed to be an adventure !

This is the point where I have to admit we are driving the i3 ‘chicken version’, with the little REx in the boot. The upside: unlimited mobility. The downside: REx wakes at 5-6 km, no matter what. So we were at the threshold of failure to do the E-thing, and that only two hours into our journey! But we made it. We had lunch, walked the totally unremarkable town, takin’ it easy as promised, until the car was charged enough to reach our next goal. The ability to use your smartphone to monitor the car is invaluable.

The next goal: Monschau. A quaint little town, picture book stuff. Flocking with tourists of a more advanced age when in season, it is actually very nice when not. Coffee, apfelstrudel, you’ll get my drift how we passed the time.

Chargetourism: Monschau

With enough inside us and in the i3, off to the next charger. A short charging session of 32 minutes at 32 amps in Daun was all it took to take us to our hotel in Bernkastel-Kues. Again a picturesque village, this time with a larger river (the Mosel) and an ancient castle on the adjoining mountain. And the best news: we have entered the wine region, so the i3 was not the only one being replenished :)

At this hotel, we had the first experience of the friendly cooperation we would encounter along the way. We were fully prepared to have to drive the car to a charging station nearby and to walk back, but the hotel owner promptly offered us a spot in his yard where we were able to plug in under the carport. Sweet.

France

Day two took us through Germany to France. Our second hurdle: the designated electrospots in Saarbrücken were occupied by gas-burners! A Zoe was already double parked and charging, but i3’s cable is not long enough to do this. Damn. Now what? Time for friendly cooperation example #2: the receptionist of the adjoining offices came out to ask us if everything was ok, noticing of course it wasn’t because of me standing there with a large blue cable in my hands, looking lost. The solution was easy: one of the owners of the damned vehicles didn’t mind to take a hike, so we could charge, albeit with a little delay. The upside: the German owner of the double parked Zoe turned up, so we had an opportunity for a nice conversation about the future of the world.

Charged and fed, off to France we went. One possibility to charge with no alternatives. Gold or bust! Golden it was. Free of charge as well. Very good of the Cora supermarket to lure crazy dutch electrotourists to their store :) With enough cheese and charge, we took off through the Alsace, an area we always quite enjoy for a lot of reasons.

One of the reasons is that it has some nice drivers’ roads with not to much other people on them. We already enjoyed some nice, but not too quick, driving in the German Eifel yesterday, and the Alsace didn’t disappoint. Nor did the i3, so it is time for some car stuff, for this is supposed to be a car blog last time I checked….

Like!

I like to start with some downsides here, so I can end the paragraph on a positive note. And I will lift a tip of the vail: it is a very positive note. But first: the grind. Although visibility all around isn’t exactly bad, the car is difficult to oversee, so it takes more practice than I’m accustomed to, to position the car in exactly the spot on the  road you want it to be when driving spiritedly. It is growing on me, of course, but it is still not an intuitive process. I guess it has to do something with not seeing any of the nose or any other external part and the overview you miss in tight left hand bends because of the drivers side A pillar. I am still not used to have to look through the side windows to oversee that tight left-hander. Then there is the steering. Once accustomed, it is excellent and precise, but so direct that you’ll have to handle it smoothly if you want to impress your co-driver with your cornering style. And the last grump, which is really a very small niggle: close the rear doors firmly before doin’ the bends, for the warning signal for these is on a hair-trigger. (Tom's note: I have had other i3 owners tell me this also. If you don't close the rear door firmly, the "door ajar" light can light up while you are driving. It's in no danger of opening, it's just an oversensitive trigger than needs to be fully depressed).

Now for the gold: Do we enjoy it when it is going where no i3 has gone before? Oh yes! Yes! It is fast and nimble, which is good in itself, but it is the smooth as cream comfort that is the hammer. The suspension is firm, you already know that, so that is not the unique selling point comfort-wise. It is the easy, creamy-smooth instant power, the effortless recuperation, the relaxed one pedal driving that makes it so enjoyable to drive on your winding Alsacien roads! Take it out, that i3, if you have it, I’ll think you’ll enjoy it as much as I do !

With plenty charge left, we arrived in the quaint Alsacien winemakers’ town to fill up us and the i3 again at the B&B, a winemakers establishment. My advice: go there, drive the roads, drink the wine. Just do it in that order!

Switzerland

Not much to tell about day three, this being a car blog. Only that the leg to Basel was 106 km, mainly motorway, so we kept it between 90-100 (55-60) in the right lane to reach our destination with some electrons to spare, for alternative usable charging stations are sparse around there. With plenty of charge to get us to our next B&B we left sunny Basel and the river Rhine. 40% charge was a luxury I could enjoy for the 10 km (6 mi) drive to and fro from the B&B to the evenings’ restaurant later. This little drive was, besides enjoyable, also a good reminder for me to keep driving carefully during the day to make the most of our E-range, for the battery had only 16% remaining when plugging back in at our B&B at night. Do the math if you like. In our defence, we had the heat on on the way back…

Goal #1: Make it to Zurich using only electric power

Being already very pleased we reached our goal of getting to Zürich fully electric the next day, we set a new goal of reaching at least 1000 km (621 mi) of uninterrupted E-use. After a very enjoyable day in Zürich and at our friends there, totally uninteresting for you i3 enthousiasts, we started drifting in the ‘back’ direction on Saturday afternoon. With one final Swiss charge in St Gallen remaining, we took the i3 through Appenzell. Some mountain roads, not the most spectacular passes, but still sporting brisk climbs once more affirmed our belief that the i3 is a very nice car indeed. It's hard to keep your foot off that throttle :-)).

Goal #2: 1,000 km all electric

Then we reached the dreaded point that was looming in the planning all along. It was not the Swiss border which we passed without ado, it was the point at which the beast in the back had to be awoken. Time for a little car talk intermezzo.

REx

I can understand that a lot of people question the execution of BMW’s REx solution. On the risk of repeating myself: I think they did a wonderful job, for it feels nearly sinful to start the REx after driving on electrons. So smooth. So quiet. So soothing for the conscience. You really get the feeling of doing the wrong thing when firing up ye olde’ ICE. And this is how it should be. It is an electric vehicle extended, mind you! Besides from this, the little bugger does its best to keep you mobile. We here in Europe have it easy, sorry about that American brethren, for we can engage REx at will, so we don’t have to motor through towns and countryside, but we can plan our  REx extension to happen anywhere along the way. The added bonus is of course that you can keep a nice safety cushion in the battery to get it up that Autobahn-slope, although it has to be said I was quite taken with the ability if the REx to keep up the battery when doing 120 (75) on the cruise with A/C to boot. On those not to steep but long slopes (climbing ~250 meters in ~35 km (~820 ft/~22 mi)), the battery level drops a little bit, of course, but I would say that a cushion of around 5% could just about, or just about not, suffice for most journeys. One thing I have noticed is that is seems that the car allows for a bigger battery-drift if you engage the REx earlier. One advantage of this is that it doesn’t have to run at top revs all the time to keep the state of charge on the small marker on your dash-display. Once the state of charge is low, it works very hard to maintain the 5% and prevent very low charge. To end this intermezzo about the REx something on fuel consumption. Exactly economical it is not. Doing 120 (75mph) on cruise gives you something of 15-16 km per litre (35-38 mpg us). Not too bad, not great. Taking 10 km (6 mi/hr) off the speed does wonders to this consumption however, but we kept it at 120 (75) where allowed.

Driving on the Autobahn: Speed kills - consumption rate that is!

A relatively uneventful 628 km (390 mi) later: home. We made a little touristic detour along the Rhine, which we used to recharge a bit during lunch, so we could cruise the 50 km (31 mi) of Rhine-borders in tranquility, and we recharged again at our nearby fast charger to make the last stretch on electricity before parking the car at its homespot with a feeling of well done planner, well done driver, well done little car. It is not perfect, but it is loveable all the way. And it’ll go further if you dare it…

Final stats of the journey

Map of journey

1780 km (1,104 mi), plugging in 16 times during the trip
Approximation of route travelled (source: Google)


Disclaimer - We have undertaken this trip and I have written this article on a strictly personal basis. I am not affiliated to BMW or anyones business mentioned in this story. Please mind that everything you’ve read here are my/our personal experiences and opinions and should be treated as such. Also, bear in mind that the English language is not my native one, so be patient if I’ve made some mistakes or used clumsy language. Any offence is unintentional.

Regards, Steven

A postcard from Steven to summarize his charging efforts along the way!

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