Briggs & Stratton PowerProtect 22kW Standby Generator with Symphony II Controller CHARGER-FAULT Error Fix: Charger Fault — Battery Charger Malfunction

Error code CHARGER-FAULT on the Briggs & Stratton PowerProtect 22kW Standby Generator with Symphony II Controller means: Charger Fault — Battery Charger Malfunction. The built-in battery charger is not functioning correctly. The charger maintains the starter battery at a trickle charge level whenever utility power is available. Without a working charger, the battery will slowly discharge and the generator will eventually fail to start during a power outage. Check the charger output with a multimeter — with utility power present, the charger should output approximately 13.5-14.5V DC. Verify the AC power supply to the charger is intact. Check the charger fuse if equipped. A failed charger module must be replaced by a B&S dealer. As a temporary measure, connect an external trickle charger to the battery.

The most successful fix is "Replace Battery Charger Module" (medium difficulty, ~45 minutes). This fix costs nothing. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Replace Battery Charger Module") is rated medium difficulty and takes about 45 minutes. Tools needed: Phillips screwdriver, Socket wrench set, Multimeter.

DIY cost: $0. Professional repair typically costs $150-$220. Many homeowners save money by trying the top-ranked community fix first.

The Briggs & Stratton PowerProtect 22kW Standby Generator with Symphony II Controller has 8 other known error codes, including: CONTROLLER-FAULT (Controller Fault — Internal Logic Error), HIGH-TEMP (High Temperature — Engine Overheating), INSPECT (Maintenance Due — Service Reminder), LOW-BATTERY (Low Battery — Starter Battery Voltage Low), LOW-OIL-PRESSURE (Low Oil Pressure — Engine Protection Shutdown), and 3 more.

Error code CHARGER-FAULT also appears on 2 other Briggs & Stratton models: 30675 12,000 Watt 20 HP 120/240V Standby Generator with Automatic Transfer Switch Ready, PowerProtect DX 26kW Standby Generator with Symphony II Controller. The fix may vary by model, so check each model's specific page for tailored repair steps.