Solar Panel Repair & Renewal Services in Scotland

Common Solar Panel Faults

Solar PV systems are designed to provide many years of reliable performance, but faults can develop over time due to weather exposure, ageing components, manufacturing defects, or installation issues.

Some of the most common solar panel problems we encounter include:

Cracked or smashed solar panels
Faulty MC4 connectors and wiring
Water ingress and moisture damage
Internal cell damage
Damaged mounting systems
Panel frame failure
Hot spots and performance degradation
Loose electrical connections
In many cases, mounting components and electrical connectors can be repaired. However, if the solar panel itself has suffered internal damage, water ingress, or significant physical damage, replacement is usually the safest and most effective option.

My Solar PV System Has Stopped Generating

If you've noticed a significant drop in performance or your solar PV system has stopped generating electricity altogether, a faulty panel, inverter, or connection could be the cause.

Many solar PV systems are wired in series, meaning a fault on a single panel can impact the performance of the entire array. It's similar to putting your foot on a garden hose; one restriction affects the whole flow.

Accurately identifying the faulty component requires specialist testing equipment and experience.

Our solar fault-finding service includes:

Solar panel performance testing
String voltage checks
Inverter diagnostics
Electrical testing and inspection
Dirty panels - see solar panel cleaning
Repair recommendations and quotations
For SolarEdge and microinverter systems, fault identification is often quicker thanks to panel-level monitoring technology.

Solar Panel Repair or Replacement?

Most solar panels are supplied with long-term manufacturer warranties, often ranging from 20 to 25 years. If your panel is still covered, we can help you assess warranty options and support your claim where possible.

However, many manufacturers require faulty panels to be returned for inspection, and in some situations the cost of removal, transport, and installation can exceed the value of the panel itself.

Because of this, most faulty solar panels are replaced rather than repaired.

Finding matching replacement panels for older systems can sometimes be challenging. Where identical panels are no longer available, we can advise on suitable alternatives and the best way to maintain the performance of your system.

Inverter Repairs & Solar System Upgrades

Not every solar fault is panel-related. We regularly diagnose and repair issues involving:

Solar inverters
Generation meters
Monitoring systems
AC and DC isolators
Battery storage systems
SolarEdge optimisers
Microinverter systems
If repair is not economical, we can recommend modern replacement equipment that improves reliability, efficiency, and monitoring capabilities.

Battery Storage Faults

Experiencing problems with your battery storage system?

Our engineers work with leading battery storage technologies and can investigate faults affecting charging, storage capacity, communications, monitoring platforms, and inverter integration.

Whether you have Tesla Powerwall, Fox ESS, Sigenergy, Growatt, SolaX, or another battery system, we're here to help.

Why Choose RB Grant?

✅ MCS Approved Contractors
✅ Over 28 Years of Solar PV Experience
✅ Scotland-Wide Coverage
✅ Expert Fault Diagnosis & Testing
✅ Assistance with Warranty Claims
✅ Fully Qualified and Insured Engineers
✅ Free No-Obligation Estimates

Need Help With a Faulty Solar PV System?
If your solar panels, inverter, generation meter, or battery storage system are not performing as they should, contact RB Grant Electrical Contractors today.

Our experienced team can identify faults, explain your options clearly, and help get your solar energy system back to full performance as quickly as possible.

Call today for a free estimate and expert advice.