@Shalvenay ok thanks yeah I do have two inverters, I think I might have a crack at simply looking at the efficiency that is going to be needed if I use the maximum watts, the nice inverter is 600 hundred and i have an old one that is 150, its just for the sake of camping so it's not like there is any real need for it to be capable of operating indefinately, i just thought it would be cool
@NickAlexeev - Thanks very much, Nick :-) I've got a lot to learn. I will be trying my best to "get up to speed" and add value, to help all the users of the site.