commercial vehicles

Oshkosh wins USPS fleet contract (sae.org) Looks fascinating. The drive train can be changed as technology changes. Telematics and cameras and ..... Looks like these could be on the road for 30 to 40 years.

I'm considering an EV as my next car (favourite is a leaf at the moment) and simultaneously setting up a small catering business. My question is can we use the EV to run a small kitchen on a trailer (fridge, kettle/urn)? To save having a nasty diesel generator. I'm aware the battery capacity...