I have an Ecoflow Delta 2 unit in my campervan. I removed the inverter from my van. 1 x dc input but I fitted ignition operated 12v 20A relay to divert from solar(on the roof) input to alternator input to the Delta 2 when engine is running. Does everything I need and my van is completely electric now (not the engine
) . Much less hassle although depends how much power you need. I do all my wiring myself as I have years of electrical experience and qualifications. You can also charge in around an hour at home via mains. I've also got a 50aH lithium battery and controller but I don't really need them now unless I'm away for a while without hookup