Have to concur with the fuck electric camp. I built three electric based MVs over the years trying to be green and cool. They suck. For a bunch of reasons.
Charge time. 4 hours if you’re lucky and have lots of power. 1000w gen is very inadequate for a golf cart.
Low capacity. You never get the range you hope for. Think 15-20 mi if you’re lucky vs 300 for gas.
Tech issues; like having one battery in a series that doesn’t hold as much charge as the others, and when it depletes it stops the rest of them till it charges. Most people with electric MVs are futzing with them all the time.
Money. By the time you get the generator, chargers, and misc crap all together, probably costs 5x using a cheap gas engine.
To answer a different question, yes, you can rig it to recharge with a portable gen while you ride around. Thing is, you could just use the gas to run the MV, and cut out the electric middle man. You always lose energy in conversion.
That said, I loved building the electrics I used, and do not regret them. Just decided to make it easier out on the playa.