Generator battery repeatedly goes dead between outages

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

• Check charger power: Confirm that the generator's internal charger is connected to a live AC source (often utility power inside the enclosure).
• Measure charge voltage: With utility power present, measure voltage at the battery. It should be around 13.2–13.6V. If only battery voltage is present, the charger may be faulty.
• Inspect fuses: Check any inline fuses between charger and battery and replace if blown.
• Replace charger or battery: Install a new DuroMax‑compatible charger if it is not outputting. Replace an old or sulfated battery that will not hold charge.