alt Hacker NewsI agree I don’t like having both engines, more to fail. BUT I could see a world where you basically have basically an EV with a smaller battery pack (150 mile range) and basically a swappable $300 generator. I saw swappable so that if anything goes wrong they just swap it for $300, and credit you back async any recovery value. Just electricity generation from it, for rare needs of longer range. I think in theory, it could be a good way to get a cheaper EV supporting rare bursts of range and low maintenance cost.
But I’m not even sure regulators would allow such a design. Even then I’m not sure it’s worth it.
But I am totally done with ICE car maintenance. I want nothing to do with it anymore.
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The bmw i3 range extender engine only generates 19kw of electricity. It doesn't allow you to "fill up and drive anywhere" like a car. It is more like a bigger battery.
I think the solution is actually what we have now - high-power dc fast chargers spread around the country.
Why not towable gas generator trailers that you can rent for long trips.
Hook it on, plug the connector up and attach your license plate to the back (or use eink).
> for rare needs of longer range.
Hmm. Supposing we need a 6 hour drive at 20 kWh per hour (eschewing specific speed/distance figures), and a generous "smaller battery pack" can provide 3 hours (60 kWh). Then the generator must supply the missing 60 kWh during the 6 hour interval, i.e. a 10 kW generator.
Google says those cost from 1k to 5k USD, and they seem rather beefy.
(Just doing the math out of curiosity, otherwise agree with you.)
You might be interested in https://en.wikipedia.org/wiki/Extended-range_electric_vehicl...
It's not exactly what you're describing, but I think it will become more common as battery technology growth slows down.
I’m not sure why you’d offer a drop in option if you can just build it into the car. Extended-range electric vehicle (EREV) / Range Extender Electric Vehicle (REEV) do exist on the market already.
A more practical solution is to just rent out a small generator on a trailer.
Unless I’ve completely misunderstood what you’re getting at.
Basically a modular trunk add-on, with an air and exhaust pipe?
> swappable $300 generator
It's never that simple, but it could be. Modular standard parts that could be installed on a standard chassis design would be great. So have a small generator or an additional battery, maybe even a fuel cell. Probably never happen but it would be the nirvana of car design. Standardization would drive scale and it could work really well. That approach did wonders for the PC industry.
A cheap diesel/gasoline generator might do like 5kW, which is enough for overnight charging but not for range extension or powering the wheels. There were several pretty good range extended EVs (plugin hybrid with larger battery and smaller engine), like the Volt and BMW i3, those had small engines that mainly acted as generators for the battery, but with enough horsepower to at least keep you rolling on the highway. A $300 modular generator ain't quite gonna cut it.
I believe there's also a bunch of Chinese vehicles with similar design, entirely electric drivetrain with gas generators for range extension. Most of these will need to kick in before the battery is empty so that there's some stored energy buffer available for acceleration.