There is some interesting comments about additional cost after article if you haven't read them you might want to. Are they correct I don't know? I do know I think within 5 years someone going to come out with something that even if I paid 2K be worth it to me. I might then think about heating my greenhouse and use lights so I could grow all winter long. I just can't see doing that now with electric bill. If I could buy something that would be enough power for that and pay off in 2 to 3 years I'd do it.