- Solar Repairs Cape Town covers fault finding and repair on solar systems that are already installed.
- Most faults sit in one of four places: panels, inverter, battery or wiring and protection.
- Compare quotes from technicians who will diagnose the fault before replacing parts.
Describe the symptom, any error code on the inverter, and the make and model of your inverter and battery.
Get Solar Repair QuotesCommon Solar Faults and Where They Start
| Symptom | Likely area | Where to read more |
|---|---|---|
| Low or zero solar output on a sunny day | Panels, DC wiring, isolator, MPPT | Solar panel repairs |
| Inverter error code or shutdown | Inverter, settings, grid or battery fault | Solar inverter repairs |
| Battery drains quickly or shuts off early | Battery, BMS, settings, communication | Solar battery installation |
| Earth leakage or breaker tripping | Wiring, water ingress, insulation fault | This page |
| Monitoring app offline | Wi-Fi dongle, router, logger | This page |
| Output slowly falling over months | Dirt, shading, degradation | Solar panel cleaning |
How Solar Fault Finding Works
- History and logs. The technician reviews the monitoring data and inverter event log.
- Visual inspection. Panels, mounting, cable runs, isolators, breakers and connectors.
- Electrical tests. Open-circuit voltage and current per string, insulation resistance, earth continuity and battery cell voltages.
- Settings check. Battery type, charge limits, grid settings and firmware.
- Written finding and quote. What failed, why, and what the repair costs before any parts are ordered.
Solar Repair Prices
| Repair | Indicative cost (incl. VAT) |
|---|---|
| Call-out and diagnosis | R850 - R2,000 |
| Replace MC4 connectors or repair a DC cable | R1,200 - R4,500 |
| Replace a DC isolator or surge protector | R1,500 - R4,000 |
| Replace a damaged panel, supply and fit | R3,500 - R7,000 per panel |
| Inverter repair (board, fan, firmware) | R2,500 - R12,000 |
| Battery BMS or communication fault | R1,500 - R6,000 |
| Re-roofing around panels (remove and refit) | R600 - R1,500 per panel |
| Replacement 5kW hybrid inverter, installed | R20,000 - R38,000 |
Parts under manufacturer warranty may be free, but labour and call-out are often still charged. Check warranty status before booking.
Describe the fault once and compare repair quotes from local technicians.
Find a Solar Repair TechnicianRepair or Replace?
- Repair when the fault is a connector, fuse, isolator, fan, setting or a single damaged panel.
- Replace when an inverter is out of warranty with a failed power board and parts are unavailable, or when a battery has lost much of its capacity.
- Upgrade when the fault coincides with a system that was undersized from the start. See solar system upgrades.
Systems Installed by Someone Else
Many repair calls are for systems where the original installer has closed or stopped responding. A technician can still work on these, but will want to see the original CoC, inverter and battery models, and ideally the SSEG approval. Missing paperwork is often fixed as part of the repair.
Cape Town Causes of Solar Faults
- Wind. The south-easter loosens poorly fixed mounts and chafes cables.
- Salt and moisture. Coastal air corrodes connectors and isolators, leading to earth faults, especially after the first winter rains.
- Heat. Inverters in unventilated garages derate and fail early in summer.
- Lightning and surges. Less common here than inland, but grid surges still damage unprotected inverters.
- Rodents and birds. Pigeons nest under panels and rats chew cables.
Staying Safe
Solar panels produce dangerous DC voltage whenever there is light, even with the inverter off. Do not open isolators, disconnect battery cables or go onto the roof to inspect wiring yourself. Switch the system off using the inverter's shutdown procedure and call a technician.
Preventing Repeat Faults
Regular solar maintenance catches loose connectors, corrosion and failing fans before they stop the system. For repair quotes, Solar Installers Western Cape lets you compare local technicians.
Solar Repairs Questions
How much does a solar repair call-out cost in Cape Town?
Call-out and diagnosis typically costs R850 - R2,000, with parts and repair labour quoted separately.
Why is my solar system producing less power?
Common causes are dirty panels, new shading, a failed string connector, a tripped isolator or inverter settings. A technician can test each string to find it.
Can you repair a system installed by another company?
Yes. Technicians regularly work on other installers' systems, though they will ask for the original paperwork.
Is my solar repair covered by warranty?
Equipment faults within the manufacturer's warranty period are usually covered. Installation faults fall under the installer's workmanship warranty, if it still applies.
Why does my earth leakage trip when it rains?
Often water getting into a connector, isolator or junction box, or a damaged cable. It needs insulation testing to locate.
Should I switch my solar system off if something looks wrong?
Yes, using the inverter's shutdown procedure. Do not touch panel wiring or battery cables yourself.
Repairs and Maintenance Services
Solar Installers Western Cape is a free quote-comparison service. Installation, repair and maintenance work is carried out by the independent solar installers that quote you, and your contract is with the installer you appoint. Ask each installer for a written, itemised quote, the registered electrician who will issue the Certificate of Compliance, and their equipment and workmanship warranty terms before appointing anyone.
Solar Repairs Cape Town. Compare repair quotes from local solar technicians.
Get 5 QuotesGet Solar Repair Quotes
Describe the fault and your equipment, and solar technicians covering Cape Town will quote directly.
Free to use, no obligation. Your request goes to LEADERR APPROVED solar installers covering Cape Town and the Western Cape, who quote you directly.
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