Fault Codes/Generac/505-J4Generac505-J4UnclassifiedGeneralWhat This Code MeansCharger failurePossible Causes•Faulty Battery ChargerSuggested Actions1Troubleshoot and repair Battery Charger systemRelated Generac Fault Codes506100050510055041006503210050221095012111Browse all Generac fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 505-J4 on your specific Generac unit — cited to the OEM manual, not a forum guess.Your question about 505-J4GET THE ANSWERFree account required — we'll bring your question with you.