✅ Inverter errors or shutdowns (e.g., ground fault, arc fault, isolation fault)
✅ No communication with monitoring system (e.g., Enphase app not showing data)
✅ Low or zero energy production from one or more panels
✅ Breaker tripping at the combiner box or main panel
✅ Wiring damage from rodents, weather, or poor installation
✅ Disconnected or degraded panel strings
✅ Old or failed inverters that need replacement
✅ Microinverter or optimizer failures
✅ Poor racking installation causing misalignment or loose panels
✅ PV system never fully commissioned due to installer abandonment
✅ Inverter firmware out of date, causing compatibility or performance issues
✅ Failed fuses, relays, or disconnects in the system
