EV for a very hilly, very small island?

[iDrive]

Hi

I have the prospect of working on StHelena - an island in the middle of the South Atlantic, with lots of hills, a 30mph speed limit and good access to UK 240V power supply

Would an EV be a realistic proposition? Would the hills kill the car?

I'm thinking Twizzy, perhaps 2nd hand?

I'd appreciate your views!