This is my non UL approved grid tie wind turbine control system. I have added more components since the picture. It has 3 turbines hooked into it with 5 inverters. 2 Sun g's and 3 SWEA grid tie inverters. All with GFCI protection and a 30 amp 220 volt A/C line going back to the main electrical panel. All D/C fusing, electric brake and coooing fan with a digital turnigy meter mounted on the fron for real time amps, watts and volts. I also have a TED 1001 Energy Detecive in my second fl. office for power production from the wind into our home. This is how I do the non UL thing. It works fantastic. The inverters work in harmony. The first two start at 11.8v (Sun G) which I can get at 7-8MPH winds. The Swea kicks in at 20v helping out the other two 10-30v invetrers. The Sun G disconnects at 30v and the SWEA handles the load from there until 60v at which the dump load is activated. Can produce 1800 watts at 30MPH winds. Stick it to the man!!!