Solar Troubleshooting Ireland: Fix Common Problems
Something not right with your solar system? Most solar problems in Irish homes come down to the inverter, a tripped switch, a monitoring glitch, or an export-payment setup issue — rarely a failed panel. Pick the problem that matches what you are seeing below for a calm, safety-first diagnostic guide. For routine care, see our solar panel maintenance guide.
Quick Answer
Start by identifying the symptom. If there is no generation at all, check the inverter and isolators first. If output is just low, it is usually season, shading or soiling. Inverter warning lights point to grid or isolation faults. If your CEG export payments are missing, the cause is usually enrolment or smart-meter setup, not your panels. Never open an inverter or touch DC wiring; use a RECI / Safe Electric registered electrician.
Generation problems
Solar panels not generating
No output at all? Work through the most likely causes — inverter off, tripped isolator or breaker, or simply night/low light — before assuming a fault. →
Generation lower than expected
Producing, but less than you thought? Usually season, shading, or soiling. How to compare like-for-like and spot a genuinely underperforming string. →
Inverter problems
Inverter fault or red light
What a red/amber light or fault icon means — isolation faults (common in wet Irish weather), grid faults, over-temperature — and what you can safely do. →
Inverter error codes explained
The fault categories behind brand codes (Huawei, Solis, GoodWe, SolarEdge, Enphase and more) and where to look them up. →
Battery & monitoring problems
Battery not charging or discharging
Usually a mode, schedule or reserve-limit setting rather than a dead battery. What to check in the app before calling your installer. →
Monitoring app not connecting
An offline app is usually a Wi-Fi or comms issue, not lost generation. Reboot steps by brand, and why your CEG export is unaffected. →
Export payment problems
CEG payments not received
Not getting paid for export? Usually CEG enrolment with your supplier, NC6 with ESB Networks, or a smart-meter issue — not your panels. →
Smart meter not recording export
Why your export may not be metered — no smart meter yet, register not active, or NC6 incomplete — and who to contact (ESB Networks vs your supplier). →
A word on safety
Solar DC wiring and inverters carry lethal voltage that is present whenever there is daylight on the panels, even when the system is switched off. You can safely check things like the inverter display, the monitoring app, whether an isolator or breaker has tripped, and whether it is simply night or a power cut.
Never open an inverter, remove panels, or touch DC wiring. For anything electrical, use a RECI / Safe Electric registered electrician in Ireland, or contact your original SEAI-registered installer while the system is under warranty.
Related Guides
Solar Panels Not Generating
No output? Inverter, isolator and breaker checks first.
Solar Inverter Fault
Red light or fault icon? What it means and what to check.
CEG Payments Not Received
Why export payments may be missing and how to fix enrolment.
Maintenance Guide
Cleaning, monitoring, warranties, and lifespan.
Sources
- ESB Networks — Connecting Microgeneration — esbnetworks.ie
- SEAI — Solar Energy for the Home — seai.ie
- Safe Electric — Find a Registered Electrical Contractor — safeelectric.ie
Last updated: June 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
John Rooney is the founder of Solar Info and has been covering the Irish solar energy market since 2023. He fact-checks all content against official SEAI data and maintains relationships with SEAI-registered installers across Ireland.
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