Fault Codes/Gillette Generators/EGillette GeneratorsEUnclassifiedElectricalWhat This Code MeansBattery will not be charged; Bank will not operatePossible Causes•Battery voltage is above 18 volts•Damaged temperature sensor on the output cord•Battery voltage does not rise above 10.5V after 3 hours•Charging in Bulk Mode exceeds 20 hours•Battery may be damagedRelated Gillette Generators Fault CodesFLASHING REDFLASHING RED AND GREENBATTERY FAULT ALARMFLASHING RED AND GREEN LIGHTSBATTERY FAULTFLASHING RED LIGHT1NFPA 110 ALARMSOVER & UNDER VOLTAGERED LIGHTENGINE FAIL TO STARTENGINE OVER SPEEDBrowse all Gillette Generators fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for E on your specific Gillette Generators unit — cited to the OEM manual, not a forum guess.TRY IT FREE