Equipment fault guides
Plain answers to the fault codes and alerts we see most often on solar systems, with what our own monitoring and service records show.
Enphase
- Enphase gateway: not reporting — what it means and what to do
The Enphase cloud has stopped receiving data from your IQ Gateway. That usually points to a connection problem between the gateway and your internet rather than panels that have stopped working. It is not urgent, but it is worth fixing so monitoring and alerts work. Start by checking your router and the gateway's network light.
- Enphase IQ Battery: low charge — what it means and what to do
Your Enphase IQ Battery has a low state of charge. During a power outage the battery shuts down at its configured shutdown level to conserve energy, and it restarts when solar power is available or the grid returns. This is not a fault by itself. Reduce the load, wait for solar or grid power, and check the Enphase App.
- Enphase microinverters: grid frequency out of range — what to do
The Enphase microinverters saw the utility grid frequency outside the range they accept, so production pauses. This usually comes from the grid rather than from your equipment, and it is not an emergency. Check the app, wait for the grid to settle, and get it looked at if it keeps coming back.
- Enphase microinverters: grid voltage out of range — what to do
The Enphase microinverters saw the utility grid voltage outside the range they accept, so production pauses. This usually comes from the grid rather than from your equipment, and it is not an emergency. Check the app, wait for the grid to settle, and get it looked at if it keeps coming back.
- Enphase system: low production — what it means and what to do
Your Enphase system is producing less than expected. Shade, weather, or a problem with some panels or microinverters can all cause this. It is not urgent. Check the app for which devices are affected and look for obvious shade or snow, then ask for a diagnosis if it persists.
- Enphase system: no production — what it means and what to do
Your Enphase system reported that it is not producing power. Causes range from a tripped breaker or grid problem to a microinverter or communication fault. Check the app and the gateway lights, confirm the solar breaker is on, and call for service if it does not recover.
SolarEdge
- SolarEdge inverter: arc fault detected — what to do now
The inverter has detected a possible electrical arc in the solar DC circuit. Treat this as urgent. Switch the system off with the inverter ON/OFF switch, do not restart it repeatedly, and call a professional.
- SolarEdge inverter: DC isolation fault — what it means and what to do
The inverter has detected that the solar array is not properly isolated from ground, which can mean a ground fault in the DC wiring. Treat it as urgent. Switch the system off with the inverter ON/OFF switch, do not restart it repeatedly, and call a professional.
- SolarEdge inverter: external fan fault — what to do
This alert means one of the inverter's external cooling fans is not working. SolarEdge's steps are to check the cable, clean or replace the fan, and open a support case if it persists. A technician should handle it.
- SolarEdge inverter: grid frequency error — what to do
This means the inverter detected the grid's AC frequency outside its allowed range, which affects production. SolarEdge's guidance is to check the country setting and consult the grid operator. Wait and recheck the app, and contact a professional if it continues.
- SolarEdge inverter: grid voltage error — what it means and what to do
This means the inverter measured AC voltage outside the allowed range and stopped producing to protect the system. SolarEdge says the inverter should restart once the voltage returns to normal. Wait, check the app, and contact a professional if it keeps coming back.
- SolarEdge inverter: no communication with the inverter — what to do
This alert means the monitoring platform cannot communicate with your inverter. The cause is often your home network, but it can also be the inverter being off. Check the router and the inverter status lights, make sure the solar breaker is on, and contact a professional if it continues.
- SolarEdge inverter: no communication with the meter — what it means
This alert means the monitoring platform is not getting data from the energy meter connected to your system. SolarEdge raises it only after no communication for at least a full day. Metering data in the app may be missing, so a technician should check the meter connections.
- SolarEdge inverter: no site communication — what it means and what to do
This alert means the SolarEdge monitoring platform is not receiving data from your system. Often the inverter has lost its internet connection rather than stopped producing. Check that your router is on and that the inverter lights look normal, restart your router once, and contact a professional if it does not return.
- SolarEdge inverter: production issue detected — what to do
This alert means the inverter's voltage is low and it is not producing energy. SolarEdge points to underperforming power optimizers, for example from shade, snow, dirt, or a malfunction. Check for snow or shade from the ground and contact a professional if it does not clear.
- SolarEdge power optimizer: no communication — what it means
This alert means a power optimizer, the small device at a panel, is not sending data to the monitoring platform. SolarEdge lists shading and connection problems among the things to check. Look at the monitoring layout to see which one, note it, and contact a professional.