Solar Panels Not Generating Power
The solar panel system showing zero or very low generation despite sunny conditions.
What Is Causing This?
- 1Inverter fault or shutdown
- 2DC isolator tripped or turned off accidentally
- 3Wiring fault between panels and inverter
How Urgent Is This?
This should be fixed in the coming weeks. Leaving it may allow the problem to worsen and cost more to repair.
What Needs to Be Done
A solar installer will check the inverter, isolators, wiring, and panel connections. They will identify and repair the fault and verify the system is generating correctly.
How Much Will It Cost?
National average estimate
Labour: £627 – £1,500 | Materials: £1,833 – £5,010
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Some fixes for this problem may require planning permission or building regulations approval. Check if your project needs permission:
How to Prevent This
Monitor generation regularly via the inverter display or app. Check that isolators are in the 'on' position. Have the system inspected every 2 to 3 years.
Related Problems
The solar inverter displaying an error code, red light, or not operating, stopping power generation.
Solar panels producing noticeably less electricity than in previous years or compared to expected levels.
Visible crack or damage to the glass surface of a solar panel, which may reduce output.
Other Solar Panel Installer Problems
Pigeons or other birds building nests under the gap between solar panels and the roof.
Visible crack or damage to the glass surface of a solar panel, which may reduce output.
The solar inverter displaying an error code, red light, or not operating, stopping power generation.
Solar panels producing noticeably less electricity than in previous years or compared to expected levels.