Hi all, Apologies for resurrecting an old post, but I am having the same issue as described here and there wasn't a clear fix/outcome. The inverter and battery were turned off after the recent widespread power failure in PE, and after turning it on it displays the F03 (battery overvoltage) error before shutting down. The battery voltage on the display reads 32.5v, which is odd due to the fact that this is a 48v unit. I have confirmed that the battery is at 48.1v. Any help would be appreciated.