Dual Batteries or one single

[megatexture]

yeah they are not cheap.. just the unit itself is 450 and u have to add a battery to it. But they do have all the connections I could need including a 240v output.

450$ sounds like a lot but if you were to make it yourself it adds up fast but I bet you would get a better unit at the end of the day. if you were to get a battery monitor also the ark wouldn't be such a bad option though mind you i added a bit on these prices as I'd be using baintech plugs and USB and cheaper parts could be used.

battery box $74 20 if you get a blank one
Merit,cig cig plugs 60
Anderson plug 20$
Inverter 60$- 300$
Dual USB plugs 65$
Ctek 7amp charger 145$ ebay
Isolator switch 30$

Around $450