Kodak invertors are very problematic. I purchased mine from recommendations and are very dissapointed. Errors and problematic setups to F12 F11 and PV overvoltage even when their are no pv connected. Out of 4 only have 1 unit left. Do not even try to use utility with them it does not work no matter how you set it up. Any recommendation what to replace these Kodak units with that is more reliable.