Thank you both for taking the time to respond. As you can see though, you have given opposite answers and hence my confusion! @robtm can you please provide a link to where you see that it can only be claimed once per property? The other response from @NCperson links to an IRS page where it says you can claim for each time you install "eligible property," which I would assume additional new panels would be. I am more partial to thinking you can claim each time you add new panels, unless there is some document that states this clearly that it is once only per each property (and you can't claim for additions). Thanks very much.
