The latest wave of Chinese hybrids have an extended EV range, and when combined with ICE will give over 600mile range. BYD come with a 240v accessory cable as standard which allows you to run 240v appliances off the cars batteries. Pure EV such as Kia PV5 don’t really work as camper due to range issues as a result of additional weight.
Although EV such as Tesla / BYD advertise a range of 300miles, this is almost impossible to achieve - more like 220/250 especially in winter. If you start also start plugging in electric camping kit, and using the climate control whilst camping, this will soon diminish the battery.
Hybrid is a better base for a camper, as the majority of hybrid batteries can be set to self charge.