Generator vs battery AC system

diesel powered is the way to go in most cases. depending the situation a battery unit could work for you but there are a lot of benefits to diesel mainly the longer lasting power supply. if you are an OOIDA member they always have discounts going on......check it out.

http://www.ooida.com/BenefitsServices/Discounts/APUs/

 

As far as I know espar has always been in the industrial heating industry. They used to supply the optional gasoline fired heater that you could order with air cooled Volkswagen cars and vans. In fact they make a gasoline version still that is what Volkswagen fans use when retrofitting or replacing the original heater.