The #1 reason for (european) companies not buying full EV vans is range, they need to drive a LOT during the day.

REX would solve that with minimal emissions. And depending on the battery size, they could drive on full EV in city centres and only allow the REX to charge the battery during longer drives.

The BMW i3 REX is a fantastic car, if you can find one, buy it.

I think a Diesel indirect injection REX would be awesome. It could burn vegetable oil, which is more viscous, but indirect injection doesn't need to atomize the fuel as much.

Could you expand on this? What was the actual problem? For example, did the range extender start and run? Did it put any energy into the battery at all?

I don't know what to call this.

"Legislated fragility"

And yet that's what an ICE car is.

So a range extender (RX) should be no worse than ICE: in fact a little less complex because you don't have a gear train and transmission.

> The LEVC TX is powered by a full-electric hybrid drivetrain. It drives in full-electric mode all the time, but is recharged by an 81-horsepower (60 kW; 82 PS) Volvo-sourced 1.5-litre turbocharged three-cylinder petrol engine.

Assume the car gets 4 miles per kWh delivered and the charging cycle is 90% efficient (measured from generator output). The 2.2kW generator can add 8 miles/hour of generator runtime (2.2 kW * 0.9 * 4 miles/kWh).

For range anxiety of the form "we're driving to a destination pretty far away and I'm not sure we can get there", that's not very helpful. For range anxiety of "I'm driving to a destination that's over half my range and then going to spend a full day [or overnight] there, but I'm not sure there will be working chargers available there", charging 8 mph times 8-10 hours is very helpful.

Worrying about being stuck in the boondocks without a charger is addressed by an 8 mph on-board charger, but I think that's the less common form of range anxiety.

The Chevy Volt range extender was 75kW; the i3's was 26.6kW. 2.2kW is literally an order of magnitude too small to replace those.

Also, something I didn’t mention in my post; at full power they’ll suck their tank dry in a little over 3 hours. You’ll get about 20 miles of range (using your assumptions above) from one. Tbf you can also parallel two of them, or buy a slightly larger model (EU3200i), but either way, it’s still not going to be anything other than an emergency backup where you have a lot of time to kill.

Re: maintenance, small engines typically are pretty needy. That one wants an oil change, spark plug gap adjustment, and spark arrestor cleaning every 100 hours of use. The latter two are only usage-based, but the oil is time-based as well (6 months) since it oxidizes, and suffers from fuel dilution. Then there’s the fuel: god help you if you put ethanol gas into a small engine and let it sit for any period of time. It’s often difficult to find E0 fuel, and while there are external fuel tanks for generators that can hold quite a bit, they also tend to vent vapor in the heat (as does any tank, including a car’s), which is unpleasant when it’s in your frunk.

Finally, engines of all kinds really don’t like being left sitting for months on end unless prepared to do so. Generally you want to run them monthly, getting them up to operating temperature, putting a load on them for a bit to fully exercise all components.

I say all this because I have an EU2200i and dearly love it, but am also painfully aware of its limitations and needs. I got it when I lived in Texas because the power outages were getting to be absurd, and my house wasn’t plumbed for natural gas, so a whole-house was out of the question. The 2200i was plenty to power two fridges, a deep freezer, TV, fans, and my server rack. I got really good at quickly running extension cords (which is a whole other discussion on ensuring proper amperage ratings and calculating voltage drop, something most people ignore).

proverbial

As dboreham says in the sibling comment, the range anxiety morphs into charger-availability anxiety. Even if I know a charger physically exists at my destination, if it's 45% or more of the range away, I still need to worry that it will be working, that my access will work, that it won't be occupied or blocked, etc.

In nearly 40 years of driving, I almost never researched gasoline availability (through the Nevada desert and in Central America, I did).

In a little over a decade of BEV driving, I've done a lot of EVSE (charger) researching.

Today, if I run out of petrol|gasoline somewhere, even if I'm in the middle of nowhere and don't have a gas can, I can still recover from that situation within an hour or so (hitch a ride to the next gas station, buy gas can, fill with gas, hitch back to my vehicle). With an EV the density of fueling/charging locations is orders of magnitude lower than for gas, and if I end up discharged I'm looking at finding a flat bed truck, or perhaps a mobile high power generator.

Disclosure: I own both kinds of vehicles.

I've had my BEV for about 5 1/2 years. My first road trip (Portland -> Santa Clara, ~560 miles each way), I planned it out ahead of time with ABRP. These days, I'll just let the nav figure it out.

I have been totally unconcerned about it since.

You’d need to tow around a 7.2kW 240V for 30A at 240V (more likely a 14.4kW generator for 240V 60A).

Using the small Honda inverter generator (which is amazing for plenty of stuff!) is akin to covering your car in solar panels to get range extension, the math just doesn’t work out.