I have not had time yet to resolve this. As I said before I called once a couple weeks ago and never got a call back. Thought I would have another chance during my vacation but I could not escape my relatives who all had Vacations at the same time. I also gotta get some bent rims and scuff marks fixed on my brand new car and I have some health related stuff to straighten out. I have been a little too stressed out lately but I will call them to resolve this soon and I will let you all know how it turns out.

Ok, I have an RMA number now. They were going to just ship me a replacement unit but then they realized that they dont have any Positive Ground units in stock. They rarely do. He said they will see if they can find a replacement, if not, then this unit will be repaired and they will do what they can to minimize turnaround time. Now what I am concerned about is shipping costs. I think this thing weighs 88lbs if I remember right. That could be over $100 to ship. Does anyone have any advice on this? I am currently trying to get two seperate claims on my car repaired and the deductables are probably going to break me otherwise this would not be a concern.

Xantrex will pay for shipping, they will issue a call tag, you box the inverter for pickup and that it

I would have done it already if I had known that. They didn't offer to pay for the return shipping until I told them I was the end user, then they said that the GT warranty covers 100% of the shipping. Then shortly after they called back and said they have a fresh set of GT 3.8 Positive Ground inverters, they would be willing to trade for one of them permanantly. Apparently its easier for them to take a loss and give us an upgrade than repair the old one. Im glad because I dont have a credit card anymore so the turn around time should be faster this way. Only bad thing is we will lose our production totals to date. Does anyone know if I would lose efficiency by switching to a 3.8 unit? The Xantrex Rep claimed the efficiency would stay about the same but that doesn't sound right mathmatically or electrically. We have a 3010watt array of Sunpower Panels.
Also they seemed really surprised that I installed this system my self. Is it really that unnusual that people can do thier own installations or is it a regulatory problem with town planning boards that ussually requires professional install?

GT3.8 is actually higher efficiency than your unit, not much and nothing you could ever measure without power analyzers but is better. Most gridtie is installed by contractors not home owners as dealing with the local regulations and inspectors is not for the faint of heart. Sounds like you'll get a new unit with no costs to you, pretty darn good IMHO

Yeah, good deal. Now if by some rare chance I come accross some panels Identical to mine, I can add a few more to each string without losses on the suniest days.

Well this is a bummer. They discovered they were wrong and they actually don't have any positive ground inverters in stock of any size. They are going to repair rather than exchange my unit, but they will fully pay for shipping and they will expedite the repairs for me. They said repairs ussually take about a week which is better than I expected, hopefully all goes well.

Ok, the inverter shipped out yesterday, this month has been a month for record rainfall so far. But of course, the first day its offline, the sky opened up and the sun came out bright as ever, figures.

Ok, we just got the inverter back today. I will let everyone know how it is working tommorow after we have the oportunity to try it out, thanks everyone!

The inverter is working and we are back in Buisness! The invoice said they had to change the main power board because it was defective. Had I not had a warranty it would have cost me $545 for the repair and then shipping on top of that. My only problem is that replacing the board reset the lifetime KWH totals. I guess thats minor though, thanks for all the advice everyone!