Solar panel repairs in Traralgon
Solar system underperforming or damaged in Traralgon? Fault finding on isolators, wiring, cracked panels and leaking mounts, with typical repair price bands.
A solar system that has lost output, shows a fault or has visible damage usually needs a diagnostic visit first, where a licensed electrician tests the panels, cabling, isolators and inverter to find the actual cause. Many faults are cheap to fix once found, such as a loose connector or a failed DC isolator, while a cracked panel or a dead inverter costs more. Repairs requested through this site are diagnosed, priced and fixed by an independent solar electrician working under their own licence; the site handles the enquiry only.
Is it safe to leave a faulty system running?
Not always. Solar Victoria and Energy Safe Victoria list three warning signs that need prompt attention: a loss of performance, burning smells and unusual noises (Be solar safe reminder). If you notice a smell or noise from the inverter, an isolator or the roof, turn the system off using the shutdown procedure displayed near your switchboard or inverter, keep away from the equipment and get it checked. Do not open isolators, climb onto the roof or touch damaged cabling yourself. The DC side of a solar system stays live whenever light reaches the panels.
A drop in output with no smell or noise is less urgent, but it still deserves a look. Losing a fraction of production every day adds up over a year, and the cause can get worse.
What goes wrong with solar systems?
| Fault | What causes it | What you might notice |
|---|---|---|
| Faulty DC isolator | A known weak point in Australian systems | Inverter faults, burning smell near the isolator, no output |
| Loose or corroded connections | Loose MC4 connectors, corroded terminals, damaged cable | Output drops, intermittent faults, arcing risk |
| Animal damage | Possums and birds chewing cables under the array | Strings dropping out, debris or nesting under panels |
| Cracked panel glass or cells | Hail, falling branches, poor handling during installation | Visible cracks, or lower output from hidden micro-cracks |
| Roof leaks at mounts | Poorly sealed roof penetrations | Stains or drips that show up only in heavy rain |
| Gradual underperformance | Dirty panels, new tree shade, a failing inverter, connection problems | Generation down on the same month in earlier years |
Those causes come from Why Solar’s 2026 guide to solar repair (Why Solar repair guide), which singles out the DC isolator: a faulty one is a fire risk and should be replaced straight away. Homes with tall trees over the roof see more of the branch and animal faults, and the Yinnar area page covers what that means for systems on farm and lifestyle properties.
If the inverter itself is the problem, the inverter replacement page covers the choice between a like for like unit and a hybrid.
How can I spot a fault early from home?
Your monitoring app or inverter screen is the cheapest fault detector you have. Once a month, compare daily generation on a clear day with a clear day in the same month last year. A sudden drop to zero usually points to a tripped isolator, the inverter or a lost internet link to monitoring. A drop of a third or so on a system with two or more strings can mean one string has stopped working. A slow decline over many months is more likely to be shading, dirt or an ageing inverter. Write down the dates and figures, because a provider can use them to narrow the cause before arriving.
How does a technician find the fault?
A careful diagnostic visit follows a set order, so that one fault is not mistaken for another:
- Read the history. Check the inverter fault log and your monitoring data for when output changed.
- Isolate safely. Shut down using the displayed procedure and confirm the system is isolated before touching anything.
- Inspect from the ground and the roof. Look for cracked glass, debris, nesting, chewed cable and lifted or damaged mounts.
- Test each string. Measure voltage and current against what the panels should produce to find a weak string or panel.
- Check isolators and connectors. Open covers to look for water, scorch marks and loose terminals.
- Check the roof penetrations. Look at seals and flashings where frames or cables pass through.
- Report and quote. Explain what was found, what is safe, and the options with prices.
Ask for the findings in writing, with photos. If you are getting a second opinion, the written report saves the next provider repeating the same tests.
What do solar repairs cost?
Why Solar’s 2026 national guide gives these bands. They are a guide only, and a quote for your system will depend on access, roof height, parts and how many faults are found.
- Health check and fault diagnostic: $150 to $300 per visit
- Wiring and connection repair: $150 to $400
- Faulty DC isolator replacement: $200 to $500
- Cracked or damaged panel replacement, plus labour: $300 to $800 per panel
Finding an exact match for an old panel can be hard, because models change. Ask whether the replacement will be electrically compatible with the rest of the string, and whether it changes the output of the array.
When is repair no longer worth it?
Why Solar’s rule of thumb: when a repair costs more than 40% of the value of a new replacement component, replacing is usually the better investment, especially for inverters. Apply it part by part. A cheap connector repair on an otherwise healthy system is good value. Paying a large share of the price of a new inverter to fix an old one that is near the end of its life is usually not.
Other signs that replacement is the better path:
- Several panels are cracked or failing, and matching parts are no longer made.
- The inverter has failed before and is near the end of its expected life.
- The roof under the array needs replacing, so the panels must come off anyway.
Where the roof is the issue, the panel removal and reinstall page explains how that work fits around a roofer. If you are weighing repair against replacement, say which parts you suspect in your solar repair enquiry so the provider can price both.
What should I ask for after the repair?
Repairs to the electrical parts of a solar system are electrical work. The Be solar safe reminder tells owners to get a Certificate of Electrical Safety for repairs, so ask for one once the job is done and keep it with your system paperwork. Ask the provider to update the shutdown procedure if anything about isolation has changed, and to note in the fault log what was repaired.
Repairs fix the fault you know about. Regular servicing, done by a licensed electrician, is how faults are caught before they show symptoms, and the solar safety inspection page explains what that service covers.
What should a solar repairer never do?
- Clean the panels and call it a repair or a safety check.
- Reset a tripping inverter repeatedly without finding why it trips.
- Leave a scorched or water-damaged isolator in service.
- Seal a leaking roof mount with silicone and leave the cause unchecked.
- Finish electrical repairs without providing a certificate.
Next step: what helps a provider diagnose the fault
When you report a solar fault for repair, include:
- The inverter brand and model, and the exact error code or status light shown.
- A screenshot from your monitoring app showing when output dropped.
- Photos of any visible damage taken from the ground, such as cracked panels, hanging cable or nesting.
- Whether you have noticed a smell, noise or roof leak, and your suburb.
Frequently asked questions
- Is solar repair covered by my installer's warranty?
Some faults are. Leaks at roof mounts and poor connections are often workmanship issues that fall under the installer's workmanship warranty, while failed panels or inverters may be covered by the manufacturer. Check your paperwork for the warranty periods and contact the original installer first if the business is still trading.
- Will my home insurance pay for storm damaged solar panels?
It depends on your policy, so ask your insurer whether fixed panels are covered as part of the building and what excess applies. Photograph the damage from the ground, keep the provider's written report and quote, and ask your insurer before work starts whether they need their own assessment.
- Can I hose down dirty panels myself to fix low output?
Climbing onto a roof is risky, and spraying water at older panels and connections can let water into parts that have deteriorated. Cleaning also does nothing for electrical faults. If output has dropped, get the system tested before assuming dirt is the cause, and leave roof work to people equipped for it.
- How do I keep possums and birds away from my solar cabling?
A provider can fit mesh or critter guards around the edge of the array to stop animals getting underneath, and repair any chewed cable at the same time. It is easiest to do while someone is already on the roof for a repair or service. Trimming branches that give animals access to the roof also helps.
- Why does my inverter keep showing an isolation or earth fault?
An isolation or earth fault means current is leaking somewhere it should not, often through damaged cable insulation, water in a connector or isolator, or a damaged panel. It needs testing by a licensed electrician to find where. Do not keep resetting the inverter; switch the system off and arrange a diagnostic visit.