Hi guys, i installed an infinisolar 15kw. The the settings are Grid tie with backup II, and charges with PV only. The bad thing is, if connected to PV and Battery it works perfectly well. The same applies if its connected to grid and battery, but if i connect battery, pv and grid, it quickly goes to error 12. Went to a level of testing with new panels not installed and not earthed, it does the same. Anyone with an idea of what might be the error.