Generator shuts down and displays E07; may occur when large loads start or during transfer.

Safety first: Isolate the generator from the building by opening the transfer switch or main breaker. Turn OFF the generator and disconnect the battery. High voltage can be lethal.

• Check load conditions: Confirm that no unauthorized external voltage source (such as a backfed inverter) is connected to the generator output. Remove any non-standard wiring.
• Inspect sensing leads: Locate the small gauge wires from the alternator to the AVR and controller. Ensure they are intact, not pinched, and firmly connected. Damaged sensing leads can cause the AVR to overcorrect.
• Controller configuration: Verify that the controller is set for the correct voltage (e.g., 120/240 V single-phase) as per the A-iPower model. Incorrect settings can misinterpret normal voltage as overvoltage.
• Test with no load: Start the generator with all loads disconnected. If E07 appears and measured voltage is above spec, the AVR or rotor field circuit is likely faulty.
• Do not operate with overvoltage: Running with high voltage can damage appliances. Arrange for professional AVR and alternator testing and replacement.