so lets say you need an efficient continuous 15 hp 5 days out of the year with your EV?
This is how I would approach it from an efficiency/cost/low timeframe standpoint. Make a bolt on range extender (this is actually a "glorified" version of the motorcycle EV pusher) that runs at bsfc at 55mph for the average cruising load, and use the EV to get up to that speed (and to help on hills). It bolts to the BACK of the EV when needed and sits in a corner of the garage the other 360 days of the year.
Note: assume the EV can freewheel, and that you can also tilt up the range extender. Just lower it to "bump start" it when necessary, tilt it up for tight maneuvers. External fuel tank might be of concern to some, but putting it in the trunk could be worse, lets just say it uses biodiesel so it is less likely to explode
I needed an excuse to play w/sketchup anyway
