A ten-second look at the lights on the front of your inverter tells you whether your solar is working. Pick your brand below.
For Huawei SUN2000 home inverters. Three small lights sit on the front of the unit.
The lights are on the front of the inverter
Power coming in from your solar panels.
Power going out to your home and the grid.
Your inverter sending data to the FusionSolar app.
System is generating and working normally.
No action needed. Enjoy the savings!
Standby mode. Little or no sunlight — night, early morning, evening or heavy rain.
No action needed. The system restarts when there is enough sunlight. Contact us if both stay blinking on a sunny afternoon.
The inverter is sending data to the app. This happens periodically.
No action needed.
Alert on the solar panel side, often damp wiring after heavy rain.
Contact us if this persists for a few hours.
Power to your home is cut off. Usually the solar RCCB in your DB has tripped during rain.
Wait until the rain stops, then switch the solar RCCB back up.
Open the FusionSolar app to see today's power and any alarms. Light 3 blinking fast means data is reaching the app.
For Sungrow home inverters. One light tells you how your solar is doing.
The status light is on the front of the inverter
Its colour, and whether it is steady or flashing, tells you how your inverter is doing.
See any other colour? Send us a photo of the light.
System is generating and working normally.
No action needed. Enjoy the savings!
Standby mode. Little or no sunlight — night, early morning, evening or heavy rain.
No action needed. The system restarts when there is enough sunlight. Contact us if it stays flashing on a sunny afternoon.
No sunlight, so the inverter sleeps.
No action needed. The system restarts in the morning.
Look at the light around midday on a sunny day. Steady blue means you are making power. Anything else at that time is worth a closer look.
Open the iSolarCloud app for today's power, total savings and any alarms. If the app says offline but the light is blue, your panels are still working — check your home Wi-Fi. A fault shows as an error code; screenshot it and send it to us.
If your inverter shows a light pattern that is not on this page, contact us and send a photo of the lights. That is the fastest way for our team to tell what is going on.
Both brands on two pages. Print it and keep it near your DB box, or save it to your phone. Prepared by the FOMO Energy Solar O&M team.
Send us a photo of the inverter lights. Our O&M team will tell you what it means and whether anything needs doing.
