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Solar System Repairs & Maintenance in South Africa: Keeping Your Investment Safe and Productive
Your solar system is a powerful investment in your home's energy security, especially with the reality of loadshedding. When it works, it provides peace of mind. But what happens when you notice a dip in production on your monitoring app or see a flashing error code on your inverter? It’s a clear sign your system needs professional attention.
A qualified solar electrician is essential for diagnosing and repairing these issues. In South Africa, a diagnostic call-out fee typically ranges from R750 to R2,000. A minor repair might cost around R1,500, while a major component replacement, like a new inverter, could cost upwards of R30,000. Most solar repairs are completed within a few hours, while larger jobs might take a day.
“The biggest mistake homeowners make is ignoring small warning signs,” says Sipho, a Kandua-vetted solar installer in Johannesburg. “A small drop in performance could be simple, like dirty panels from Highveld dust, or it could be an early warning of an inverter fault. Getting it checked early saves thousands in the long run.”
The Professional Repair and Maintenance Process
When a qualified Kandua Pro arrives for a solar repair or maintenance job, they follow a systematic process to ensure the issue is diagnosed and fixed safely, adhering to South African standards.
- Initial System Assessment: The electrician will first discuss the problems you have noticed, such as reduced energy production, specific error codes, or unusual noises from the inverter.
- Visual Inspection: They perform a thorough visual inspection of your entire system. This includes checking the panels for physical damage, debris, or signs of water ingress. They will also examine the inverter, batteries, and all visible wiring for wear, corrosion, or damage, a common issue in coastal areas like Durban and Cape Town.
- Inverter Diagnostics: The inverter is the brain of your system. The pro will check its display for error logs and connect specialised tools to analyse performance data. This helps pinpoint if the problem is an internal fault, a grid connection issue, or a communication error.
- Component Testing: Using tools like a multimeter and a thermal imaging camera, the technician will test the voltage of panels and batteries. Thermal imaging is crucial for detecting "hot spots" on panels, which are invisible to the naked eye and indicate a cell failure.
- Fault Identification & Repair: Once the root cause is identified, the electrician will explain the problem and the necessary repairs. This could involve anything from cleaning the panels and re-terminating a loose connection to replacing a faulty component, all while following the strict safety protocols outlined in the SANS 10142-1 electrical wiring code.
- Post-Repair Testing: After the repair, they will perform a final test to ensure the system is operating at its optimal level and the problem is fully resolved. They will also provide advice on preventative maintenance you can perform yourself.
The Risk of DIY Solar Repairs: Why You Need a Professional
Attempting to repair a solar system yourself is extremely dangerous and can be a costly mistake. Solar PV systems generate high-voltage DC electricity, which carries a much higher risk of fire and electric shock than standard household AC wiring if mishandled.
Furthermore, most solar component warranties in South Africa are voided if repairs or modifications are performed by an uncertified individual. A qualified solar electrician understands the complexities of DC power, has the correct diagnostic tools, and is trained to work safely. Their expertise not only ensures the repair is done correctly but also protects your home, your family, and your investment.
Is Your Solar System Underperforming? Common Issues in SA
Based on insights from Kandua’s solar experts, here are the most common culprits for an underperforming system in South Africa:
- Dirty Panels: Dust in Gauteng, pollen in the Western Cape, or coastal salt spray can accumulate and significantly reduce efficiency.
- Inverter Faults: These can range from simple software glitches to complete component failure.
- Damaged Wiring: Rodents and general wear and tear can cause wiring to become damaged, posing a serious safety risk.
- Shading: New tree growth or a neighbour's new extension can cast shadows on your panels, drastically reducing output. A pro can often mitigate this with power optimisers.
For a deeper dive into what a new system might cost, check out our Solar Installation Cost Guide.
Checklist: Before Your Installer Arrives
To make the repair process smoother and faster, have the following ready:
- Note Down the Symptoms: When did the problem start? What error codes are visible on the inverter?
- Clear Access: Ensure there is safe and clear access to your roof, inverter, and distribution board (DB).
- System Documents: Have your original installation documents and component warranties handy if possible.
- Monitor Access: Be ready to share access to your system’s monitoring app or web portal.
Real Customer Stories
Thabo in Pretoria saved over R15,000 in potential repairs. He noticed his system's output had dropped by 20%. A Kandua Pro performed a diagnostic for R850 and used a thermal camera to spot two faulty panels with internal micro-cracks, likely from a past hailstorm. "The installer showed me the heat spots on his camera. I would never have found that myself," Thabo says. By replacing just those two panels instead of the whole string, his system was back to 100% efficiency.
Aisha in Cape Town was worried about a persistent tripping issue during loadshedding. A qualified electrician from Kandua identified that the inverter settings were not correctly configured for her specific battery type. A simple R1,200 service call to reconfigure the system’s firmware solved the problem completely, giving her reliable power during outages.
Frequently Asked Questions (FAQs)
Q1: What are the main components of a solar system that might need repair?
A: The most common components needing repair are the solar panels (for damage), the inverter (for electronic or software faults), and the batteries. Wiring and connections can also degrade over time.
Q2: How do I know if my inverter is faulty?
A: Look for persistent error codes, a sudden drop in power production, unusual humming noises, or a complete shutdown. If your monitoring app shows zero production on a sunny day, the inverter is the first place to check.
Q3: Is it normal for my solar panels to produce less energy in winter?
A: Yes, absolutely. Shorter daylight hours and a lower sun angle mean lower production in winter. This is normal and not a sign of a fault unless the drop is significantly worse than in previous years.
Q4: How can I check if my solar system is still under warranty?
A: Refer to the documents from your original installer. Panels typically have a 20-25 year performance warranty, while inverters and batteries have shorter, separate warranties (usually 5-10 years).
Q5: What should I do if a bird has nested under my solar panels?
A: Do not disturb a nest with eggs or chicks. Once the nesting season is over, you can have it removed. To prevent it from happening again, ask a professional to install bird-proofing mesh around your array.
Q6: Can a lightning strike damage my solar system?
A: Yes. A nearby or direct lightning strike can destroy your inverter and other electronics. Proper surge protection, as required by South African regulations, is essential to minimise this risk.
Q7: How much does professional solar panel cleaning cost?
A: In South Africa, professional cleaning for a standard residential system typically costs between R800 and R2,500, depending on the size and accessibility of your roof.
Q8: Can I add more panels to my existing solar system?
A: Usually, yes, but it requires a professional assessment. Your installer must confirm if your current inverter can handle the extra capacity and if the new panels are compatible with the old ones.
Q9: Why does my inverter shut down during loadshedding?
A: Standard grid-tied inverters are legally required to shut down during a grid outage to protect municipal workers. Only hybrid or off-grid systems with batteries are designed to provide power during loadshedding.
Q10: My neighbour's new tree is shading my panels. What can I do?
A: The best first step is a friendly chat with your neighbour about trimming the tree. If that’s not possible, a solar pro can assess if reconfiguring your panels or adding optimisers could solve the problem.
Electricians in South Africa: what to know before you book
Electrical issues have a way of starting small… and turning serious fast. A plug that “sometimes trips” can become a melted socket. Flickering lights can point to loose connections. And if your earth leakage keeps going off, it’s often your home telling you something isn’t right.
Kandua helps you get it sorted by matching you with a vetted electrician for your job — whether it’s a repair, installation, inspection, upgrade, or an urgent call-out.
A few quick answers (so you don’t have to scroll)
How do I choose a good electrician?
Pick someone who explains the cause (not just the symptom), tests before they replace parts, prices transparently, and can issue the right compliance paperwork when it’s required.
Do I need an Electrical Certificate of Compliance (CoC) in South Africa?
Often, yes — especially for property transfer and for any additions/alterations to an installation. The Department of Employment and Labour has also warned against “paper CoCs” issued without proper testing, and urges homeowners to use legally registered electrical contractors.
What should electrical work cost?
Most electricians charge a call-out fee + labour + materials, with higher rates for after-hours, complex fault finding, DB work, or urgent callouts. (There’s a pricing guide further down.)
What should I do first in an electrical emergency?
If it’s safe, switch off power at the main breaker, keep people away from the affected area (especially if there’s water), and call an electrician. If there’s smoke/fire risk, treat it as an emergency immediately.
Common electrical problems (and what they usually mean)
You don’t need to diagnose like an electrician — but it helps to know what the usual “signals” point to.
“My plugs keep tripping / the power keeps going off”
Often caused by an overloaded circuit, a faulty appliance, a loose connection, or a problem at the DB (distribution board). If it’s frequent, don’t just keep resetting — you want proper testing to prevent heat build-up and damage.
“My earth leakage trips randomly (especially at night or when it rains)”
This can indicate moisture ingress, a faulty appliance, deteriorating insulation, outdoor circuits taking on water, or an earthing/bonding issue. It’s common — and it’s exactly the sort of thing that needs systematic fault finding.
“My lights flicker / dim when I use appliances”
Sometimes it’s a supply issue — but it can also point to loose connections, voltage drop, an overloaded circuit, or a stressed neutral. If you’re noticing it across multiple rooms, get it checked.
“I smell burning / a plug is warm / there’s buzzing at the DB”
Treat this as urgent. Heat + electrics is how small problems become big ones. Switch off the circuit (or main breaker if you’re unsure) and book an electrician.
“I get a small shock/tingle from taps or appliances”
That can be an earthing/bonding fault and should be investigated quickly — especially in kitchens, bathrooms, and anywhere near water.
When it’s a DIY job — and when it isn’t
DIY can be fine for low-risk, non-electrical basics (like replacing a light bulb, resetting a tripped breaker once, or unplugging an appliance to test if it’s the cause).
Call an electrician when:
- a socket/switch is hot, crackling, discoloured, or smells burnt
- breakers/earth leakage keep tripping
- you suspect faulty wiring, water exposure, or a hidden issue
- you’re touching the DB, adding circuits, or upgrading capacity
- you’re installing high-load appliances (oven, hob, geyser, heat pump) or adding dedicated circuits
- you’re adding solar/inverter equipment or changing the installation layout
- you may need a CoC for compliance, insurance, or sale/transfer
Certifications, registrations & compliance in South Africa (what matters and when)
This is the part people usually discover too late. Here’s the simple version.
1) Electrical CoC (Certificate of Compliance)
A CoC is a legal document confirming an electrical installation has been inspected and tested and is compliant. It’s commonly required before property sale/transfer, and it’s also required when electrical work involves additions or alterations.
Also important: the Department of Employment and Labour explicitly warns that a registered contractor may only issue a CoC after proper inspection/testing, and may not issue on behalf of an unregistered person.
2) “Registered person” (who is actually allowed to certify)
In practice, certification is tied to being a properly registered/authorised person (often referred to as a wireman’s licence / registered person in the industry). If you need a CoC, ask upfront:
“Are you legally registered to inspect, test, and issue the CoC for this work?”
3) CoC validity (the part everyone argues about)
A useful way to think about it:
- For transfer purposes, the regulations are commonly applied as “not older than 2 years”.
- For day-to-day living, it remains relevant until changes are made — if you alter/add to the installation, you’ll typically need a supplementary CoC for that work.
4) Solar / inverter / PV additions (very common now)
If you’re adding solar PV or inverter equipment, treat it as a compliance-sensitive electrical project. Industry guidance stresses that PV work should be under the supervision of properly qualified electrical persons, and the City of Cape Town’s guidance notes you should request the original electrical CoC from the registered installation electrician.
Pricing: what to budget for an electrician in South Africa
Pricing varies by city, travel distance, urgency, and complexity — but most homeowners will see a familiar structure:
Typical cost structure
- Call-out fee (travel + initial assessment)
- Labour (hourly)
- Materials/parts
- After-hours premium (nights, weekends, public holidays)
- Specialist testing / fault finding time (often where the real value is)
Typical ranges you’ll see (guideline)
- Labour: roughly R350 – R700/hour for many standard jobs (average often around the mid-range), with higher rates for specialised work.
- Emergency call-out: often around R600 – R900 (and may or may not include the first hour — always ask).
A realistic “small job” expectation
Even when it sounds simple, budget for a call-out + 1–2 hours labour plus parts. If you have a few small fixes, bundling them into one visit often saves money.
10 Genuinely helpful electrician FAQ's
- What’s the difference between “the power tripped” and “earth leakage tripped”?
A normal breaker trip usually points to overload or a circuit fault. Earth leakage trips when it detects current leaking to earth (often moisture, insulation breakdown, or a faulty appliance). If earth leakage trips repeatedly, it needs proper fault finding. - How do I figure out if it’s my appliance or the house wiring?
A safe starting point is to unplug high-load appliances and see if the trip stops — but if trips continue (or you see heat/burning smells), stop testing and get an electrician. The correct method is measured testing, not guesswork. - Why does my plug socket feel warm?
Warmth can mean a loose connection, overload, poor contact, or damaged wiring — all of which can create heat and become dangerous. Book it in sooner rather than later. - My lights flicker when I use the kettle/microwave — is that normal?
Occasional minor dimming can happen, but persistent flickering/dimming can signal voltage drop, loose connections, overloaded circuits, or neutral issues. If it’s happening across rooms, get it checked. - Do I need a dedicated circuit for an oven/hob/geyser/heat pump?
Very often, yes — these are high-load items and are safer (and usually more reliable) with correct isolation and wiring sized for the load. An electrician should assess and advise based on your DB capacity. - What’s involved in a DB (distribution board) upgrade?
Typically: inspection of existing circuits, correcting unsafe/incorrect connections, adding/replacing breakers, ensuring earthing and bonding are correct, labelling circuits, and testing. DB work should be done carefully and properly documented. - Do I need a new CoC after renovations?
If the renovation involved electrical additions/alterations (new circuits, moved points, new DB work, solar/inverter additions), you’ll usually need a supplementary CoC for that work. - How long does a CoC take to issue?
It depends on how many defects are found. A proper CoC requires inspection and testing — if repairs are needed, it may take longer. Be wary of instant “paper CoCs” with no testing. - Does an electrical CoC cover everything in the house?
A CoC generally relates to the electrical installation and its safety/compliance (distribution, wiring, earthing, bonding, etc.). If you have specialised systems (like solar PV or an electric fence), ask what additional documentation is required for those. - What should I ask an electrician before they start?
Three questions cover most issues:
- “What do you think is the likely cause, and how will you test it?”
- “Is this priced as call-out + hourly + materials, and what counts as after-hours?”
- “Will this work require a CoC or supplementary CoC — and are you registered to issue it?”
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