Generator cranks slowly or not at all; no error code is displayed.

Safety first: Disable auto-start and wear eye protection when working around the battery.

• Visual inspection: Check the Honda generator's starting battery for swelling, cracks, or leaking electrolyte. Replace immediately if damaged.
• Clean terminals: Remove negative then positive cables. Clean posts and clamps with a wire brush and baking soda solution. Reinstall, tightening firmly (positive first, then negative).
• Test battery: Use a battery tester or multimeter. If voltage is below ~12.0 V after charging, or fails a load test, replace with a battery meeting Honda's CCA and size specifications.
• Check charger: With AC utility present, measure voltage at the battery. If it does not rise to ~13.2–13.6 V, inspect and replace the onboard battery charger module or DC power supply.