I'd like to set up a home hydro electric generator and house battery. Annoyingly, the traditional components to do this are pretty crazy expensive.
That said, used i3s are cheap and seemingly have almost all the components I'd need on board (everything other than some gears and a transformer)?
Here's my basic, afternoon of pondering, concept:
1) Donor i3 is left in the "on" position 100% of the time.
2) Water wheel is geared directly into the rear axle such that it charges the battery via regen. If the battery gets full, the car would automatically switch over to coast mode with no input from me, so it’ll never be overcharged
3) House would be connected to the battery via inverter.
4) Battery temperature regulation would continue to occur via the cars standard battery heating/cooling system
5) Everything in the car is weatherproof, so it could just be parked in the mill house and not worried about beyond that
6) If we had a drought or our needs outran the battery capacity/power generation, the REx could step in to give us a bit extra
7) Unlike solar, hydro generates around the clock—so I could program the normal (driving) cars to only charge after we go to bed. This would maybe allow them to be charged (at a reduced rate) without depleting the house (donor i3) battery, significantly reducing the size of a home battery we’d need (and I believe the 2017 i3 battery is already 2x the capacity of a Tesla Powerwall). In a pinch, where we need a fast home charge for some reason, could do a high speed charge off the battery.
8) use the rest of the car as a parts car for my i3 as things break
I’m sure this is actually a terrible idea somehow. What am I missing?