Generator battery repeatedly goes dead between runs, even though the charger is connected.

Safety first: Turn OFF the generator and disconnect battery negative before testing.

• Test charger output: With utility power present, measure voltage at the charger leads; it should be around 13.2–13.6 V DC. Replace the charger if output is low or zero.
• Check for parasitic draw: With the generator off, use an ammeter in series with the battery to measure current draw. More than a small standby current may indicate a fault in accessories or controller.
• Inspect battery: Load-test the battery; replace if it fails to maintain voltage under load.
• Clean and tighten terminals: Ensure all battery connections are clean and tight to minimize resistance.

Correcting charging and parasitic draw issues will extend battery life and ensure reliable starting.