Posting this out there for what it's worth.... Hopefully someone else will benefit. I have 3 Chinese GTI's: 2 Sun 1000 and 1 KLNE 5000. To date: The first Sun 1000 GTI I bought 10 months ago already is making a very loud noise when the fan kicks on, I suspect the bearings are shot. So unless I replace the fan soon it will likely overheat and smoke some circuitry/chips inside. Inverter: Sun 1000 Overall satisfaction (0-10, 10=best) = 5 PROS: The inverter is super simple to setup and get going and cheap. CONS: The efficiency is way-over inflated, with over 1200 watts of panels I've seen ~700w max at solar noon on a clear day. Inverter: KLNE SunTeams 5000 Overall satisfaction (0-10, 10=best) = 4 PROS: Half the cost of SMA or similar high quality inverters CONS: Poor documentation, poor connectors (can't wire 8 gauge wires directly the terminal lugs are two small). Poor quality control, first inverter I got was DOA, second inverter is having other random fault issues. Post your experience with Chinese inverters, perhaps my experience isn't the norm, or perhaps it is.