What fools people
- The inverter appears fine during light bench-style tests.
- The real problem appears when a motor, charger, or sensitive electronics come online.
- The symptom looks like random incompatibility when it is actually a repeatable mismatch.
First checks to run
- Separate resistive loads from motor loads and sensitive electronics.
- Review inverter rating versus actual startup demand.
- Inspect neutral, ground, and transfer-switch behavior for the operating mode in question.
Likely causes
- Startup surge above practical inverter capacity.
- Grounding or neutral switching conflict.
- Equipment that dislikes the inverter waveform or changeover behavior.
When it is urgent
- The inverter is overheating, alarming, or dropping critical loads.
- Unexpected transfer behavior is affecting AC safety.
- The system behaves differently underway, on shore power, and on battery, without a clear reason.
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