Wrenches,
We have an installation in place since 2008 working well with a Solectria PVI 2500 feeding a supply side grid connection. Homeowner wants us to double the system size now. I can buy a SB3000 inverter for $ 300 less than the Solectria PVI 2500 (with upcharge for 10 yr warranty) and I'm inclined to go with the Sunny Boy. We would add an Inverter 240Vac combiner load center before our 30A Fused Disconnect. I would think that it would be OK to combine the 240vac outputs of different inverter manufacturers and sell into the grid but never having done this I wanted to run it by you folks. The SMA phone tech didn't seem to be the most experienced person and after I spoke with him for a minute I had him saying that it should work fine. But wanted to check with more experienced people. One wrinkle is that the Solectria does not use a Neutral, but the Sunny Boy does. Again, I don't think that this will any problem. David Palumbo Independent Power LLC 462 Solar Way Drive Hyde Park, VT 05655 www.independentpowerllc.com NABCEP Certified PV Installer Vermont Solar Partner 24 Years Experience, (802) 888-7194
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