Vanagons are not a smart platform for an electric vehicle.  It's way too heavy.

You should only consider electrifying a Vanagon if you need cargo
space and a very short range at slow speeds.

I'm not bashing EV's, I think electric vehicles, hybrids, and PHEV's
are really cool, but you have to realize a gallon of gas is
equivalent to between 10 and 15 kilowatt-hours of energy.

Now calculate how large a motor required to propel a Vanagon and
you'll see you need a busload of batteries to go the distance that 2
gallons of gas will propel you.

If you want to be eco friendly, buy a small car as a daily driver or
a small electric car.