[bennelson]

The other thing to remember for heating is that you need a really good switch to turn the heater on and off.

We are dealing with DC power and a fair amount of amperage. Seems like most guys are using solid-state relays for heater controls.

Also, you could use a locally purchased heater (that runs at native voltage) for preheating your car while it is charging. It can be set on a timer. That warms the whole interior of your car, and makes it much more comfortable.

All the new commercially built electric cars coming out are going to have electric pre-heat and pre-cool.