Thermo Group — Solar Experts You Can Trust
Affordable solar installations for homes and businesses in Durbanville — quality workmanship, transparent pricing, no premium mark-up.
At Thermo Group, we provide professional solar installation solutions throughout Durbanville and the surrounding Cape Town areas, helping homeowners and businesses take control of their energy costs while improving energy independence.
Thinking about solar in Cape Town?
Free solar quotes, no obligation. Installation and City registration handled for you.
Free solar quote · no obligation
Tell us about your home in 5 quick steps
No prices on screen and no pushy sales. We call you back the same day, do a free site assessment, then send an accurate written quote.
Step 1 of 5
Where is the property?
Type of property
What do you need, and how much power do you use?
What are you looking for?
Roughly what is your monthly electricity bill?
Optional: a photo of a recent bill lets us size your system more accurately before we call. Skip this if you do not have one handy.
What must keep running when the power is off?
Tick anything specific you want covered (optional)
How would you prefer to pay?
This only helps us come prepared. You are not committing to anything and no amounts are shown here.
Where should we call you?
Best time to call
Preferred time for the free site assessment
By sending this you agree to our solar quote terms. We use your details only to contact you about this request.
Prefer to talk? Call 021 203 5337 or WhatsApp 082 302 0683
Our experienced team handles the complete solar installation process — from assessing your property and designing the right system, through to installation, testing, compliance and registration.
Whether you are looking for a solar PV system, battery backup, hybrid inverter or a complete energy solution, we work with you to design a system suited to your property’s electricity usage and requirements.
Complete Solar Solutions
Our solar services include:
- ☀️ Solar panel installations
- 🔋 Battery storage systems
- ⚡ Hybrid and backup inverter systems
- 🏠 Residential solar installations
- 🏢 Commercial solar installations
- 🔧 Solar system upgrades and expansions
- 📋 Electrical compliance and certification
- 🏙️ SSEG applications and registration
- 📝 Solar system registration with the City of Cape Town
- 🔍 Solar system inspections and fault finding
- 🛠️ Ongoing solar maintenance and servicing
We Don't Just Install — We Maintain
At Thermo Group, our relationship with our clients doesn’t end when the solar installation is complete.
We offer ongoing maintenance and servicing for our clients’ solar systems, helping ensure that their equipment continues operating safely and efficiently. Our team can assist with inspections, fault finding, inverter issues, battery systems, electrical connections and general system maintenance.
Regular maintenance can also help identify potential problems before they become expensive failures.
As trusted solar contractors serving Durbanville, our qualified solar installers provide dedicated solar panel maintenance and PV system maintenance plans, so your investment keeps performing at its best for years to come.
SSEG & City of Cape Town Registration
Installing a solar system is only part of the process. Where required, your system must also be properly documented and registered with the City of Cape Town.
Thermo Group can assist clients with the SSEG application and registration process, helping ensure that the required documentation, electrical compliance requirements and system information are correctly dealt with.
Our goal is to make the process as straightforward as possible for the property owner.
Your Local Solar Experts
From the initial consultation to installation, compliance, registration and ongoing maintenance, Thermo Group provides a complete solar solution under one roof.
Driven by Quality. Powered by Trust.
More Solar Services
Explore our full range of solar installation and solutions services across Cape Town, or find out more about our solar maintenance plans.
Solar in Durbanville: Sun, Hills, Wind and What They Mean for a System
Durbanville sits on the rolling Tygerberg Hills, with vineyards on slopes roughly 100 to 240 metres above sea level and the Atlantic breeze reaching it from the west. Its climate is Mediterranean: dry summers, and most of the rain falling between May and August. That is generally good news for solar, with long dry summer days, but it shapes the design in a few specific ways.
- Summer output is high, winter output is lower. Short days and passing fronts reduce production just as the evenings lengthen, so insist on seeing a July estimate next to the yearly figure.
- Cooler breezes help. Panels lose efficiency as they heat up, so ventilated, flush mounting on an open roof usually does better than a cramped installation.
- The south-easter matters. It blows roughly from September to March, and mounting systems must be designed and torqued for wind load.
- Slopes and trees cast shade. In hillside suburbs, shading from the slope itself and from mature trees is common. A shade check at different times of day should come before sizing.
Dust is the other local factor. Dry summers and nearby farmland leave a film on the glass, and the inverter’s monitoring app shows when output drops against comparable clear days.
Roofs and Property Types: Historic Centre, Estates and Larger Plots
Your roof decides what is possible, and Durbanville offers a wide range of them.
The historic centre
The old core has Victorian and Edwardian houses, many with slate roofs that were later replaced by corrugated iron. Whatever its age, a roof must be checked for condition and load before panels go on, and a tired one is best replaced first. Heritage law also matters: for a structure over 60 years old, the provincial heritage authority issues the permit needed to alter it, and fixing panels to the roof may count, so ask before you commit.
Estates and newer suburbs
Newer homes in estates such as Kanonberg, Clara Anna Fontein and Welgedacht generally have modern tiled or sheet roofs, and may have design rules for how panels look. Get the written rules first.
Roof types in general
- Sheet metal roofs, whether corrugated iron or IBR, are normally clamped or bracketed to the roof structure.
- Concrete tile roofs use hooks slipped under the tiles.
- Flat roofs carry tilt frames, either weighed down with ballast or fixed through the waterproofing and sealed at each fixing.
- Thatch rarely suits panels, because of the fire risk.
- Asbestos-cement sheeting calls for a specialist, because drilling and fast-moving cutting tools are restricted on it.
Larger properties may suit ground mounts or carports, which are structural jobs in their own right and need their own assessment.
Estates, Complexes and Retirement Villages: Getting Approval First
Durbanville has a number of gated estates, lifestyle estates on the hill slopes, townhouse complexes and at least one estate with a retirement village. In all of these, the roof or the boundary may not be yours to alter alone.
- Read the rules. Estate design guidelines often cover panel position, colour, visibility from the street and equipment enclosures.
- Get written approval. Trustees or the homeowners’ association should approve in writing before the City application, since the City process assumes you have the right to install.
- Sectional title is different. The roof normally belongs to the whole scheme, so panels usually need the trustees’ agreement and, in some schemes, a formal resolution or exclusive-use rights over part of the roof.
- Agree on insurance and maintenance. Who insures the equipment, who maintains it and who is responsible if the roof leaks should all be recorded.
- Plan for the long term. A system on a retirement or clustered scheme should be designed with maintenance access and monitoring that the residents can understand.
Where a developer is building several homes, a coordinated design can be simpler than many individual ones. See solar for property developers in the Western Cape for that approach.
Battery, Hybrid and Pump Loads: Designing for Load-Shedding
Solar can trim your daytime consumption, keep chosen circuits alive during an outage, or do both. The design question is which circuits matter to you and for how many hours.
| System | What it does | In an outage |
|---|---|---|
| Grid-tied, no battery | Supplies loads by day and tops up from the grid | Shuts down automatically, so you have no power |
| Hybrid, grid-tied with battery | Solar by day, battery for evenings and outages | Powers a protected essential-loads circuit |
| Off-grid or standby | Runs the property independently | The City no longer accepts applications for these in its supply area |
For a typical home, a hybrid system backs up lights, fridge, freezer, router, gate and a few sockets, and leaves the geyser, oven and pool pump off. Batteries are mostly lithium iron phosphate or lead-acid. Lithium generally allows deeper usable discharge and longer cycle life, while lead-acid may need ventilation and regular checks. Read the manufacturer’s data sheet for usable capacity, since the label’s headline kWh is not what you can draw.
Motors need extra thought
Smallholdings, farms and some larger homes run borehole pumps, irrigation pumps and compressors. Motors draw a surge on starting, so an inverter that handles the running power can still trip when a pump starts. Check starting current before sizing. Our pages on farm solar for irrigation and boreholes and solar for wine estates cover agricultural sites in more detail.
City of Cape Town Registration, Certificates and Insurance
Where the City of Cape Town is your electricity supplier, a solar and battery system tied into your wiring needs the City’s authorisation before installation and before switch-on. New systems have counted as grid-tied since 1 October 2023. Registration costs nothing, and a fee arises only when an owner fails to register. If Eskom or another body supplies you, which is more likely on farms and smallholdings, ask that supplier for its current requirement first.
How it unfolds
- The application is made on the City’s e-Services portal, using an inverter from the approved list.
- Permission to Install follows from the City. Panels may go up, but the system stays off until approval.
- Once the work is complete, the Certificate of Compliance, commissioning report and supplemental contract go in, and an ECSA-registered professional signs the commissioning report.
- Switch-on happens only after the City’s commissioning letter arrives.
Certificate and authorisation are separate documents, and a grid-connected system needs both. Running a system before approval can lead to a contravention notice, a service fee and eventually disconnection. Supplies above 100 A and group developments are assessed case by case, and any later expansion means a fresh application. For the systems we install, Thermo Group takes care of the City registration.
Once the system is in, tell your insurer and ask what is covered for theft, lightning and fire. Insurers often request proof of a valid certificate after a claim, so file the certificate, invoices and commissioning papers together. The solar certificate of compliance page lists what is inspected.
Commercial, Industrial and Farm Solar Around Durbanville
Durbanville’s light industrial parks, shops, schools, clinics and farms often use most of their electricity during daylight, which suits solar. The questions to settle are how much of the daytime load solar will cover and how that changes the bill.
- Load profile. A year of consumption data, compared with trading hours, shift patterns and weekend use.
- Tariff structure. Business tariffs from the City often mix energy charges, time-of-use periods and a charge for peak demand. Solar cuts daytime energy purchased, but a cloudy spell can coincide with your peak, so it cannot promise a lower demand charge.
- Cold rooms and cellars. Refrigeration runs around the clock, so batteries or a generator changeover may be needed to protect critical loads.
- Roof or ground space. Roof age and strength, asbestos, access for maintenance and room for inverters.
- Export or zero export. Export needs an advanced meter at the owner’s cost, while zero export uses reverse-power-flow protection.
Business owners have been able to claim a tax deduction on qualifying PV under section 12B of the Income Tax Act, though the rate and conditions have shifted and ownership of the system matters. Your accountant can confirm today’s position. Where a business rents, landlord and tenant should settle who pays for the system, who owns it and whether the lease permits changes to the roof.
For the citywide service, see solar installations in Cape Town.
Choosing a Solar Installer in Durbanville: Checklist, Credentials and Upkeep
A sound quote names the panels, inverter and batteries by make, model and quantity. It gives the array in kWp, the inverter in kW and the battery in kWh, and it confirms the inverter appears on the City’s approved list. It explains how the roof and wind load were assessed, says who deals with approval, registration and the Certificate of Compliance, and spells out what stays powered in an outage. Be wary of a quote with no site visit, kit described only as “equivalent”, registration called optional, or pressure to pay everything upfront.
Credentials
Thermo Group is a SAPVIA member and holds PV GreenCard, a quality-assurance and training scheme for PV installers that runs through SAPVIA. A certified company hands the owner an as-built report once the job is finished. The scheme is voluntary and cannot stand in for the electrical Certificate of Compliance. The City further suggests asking any installer for references to earlier City-authorised installations.
Upkeep in dry, dusty summers
Wash panels in the cool of early morning or evening, using clean water and a soft brush. Pressure washers and abrasive pads can damage the coating, and steep roofs should not be climbed without fall protection. A yearly inspection should look at fixings, connectors, earthing, inverter ventilation and the battery. For servicing and faults, see solar maintenance and solar repairs and fault finding.
We also install across the Northern Suburbs, including Bellville, Brackenfell, Kraaifontein and Welgemoed. For a free quote, send your details, or call 021 203 5337 or 082 302 0683 directly.
Solar Installers Durbanville: More Questions Answered
It affects the mounting more than the panels. The wind blows roughly from September to March, so rails, clamps and fixings must be designed and torqued for wind load, and the roof structure must be sound where the brackets connect. Flush mounting is generally preferred on pitched roofs. Have the array checked after severe storms.
It can. Slopes and mature trees often cast shade in hillside suburbs, and even a small shadow can pull down a whole string, depending on the wiring. A good installer checks the shade at several times of day and lays the array out around it, using optimisers or separate strings where needed.
Often yes, provided the roof is sound and can carry the load. Have its condition checked first, because redoing a roof after panels are fitted is costly. For a building more than 60 years old, find out whether a heritage permit is required before anything is fixed to it.
Ask your trustees or homeowners’ association for the written design rules, and get their approval in writing before applying to the City. In sectional title, the roof is normally common property, so a resolution or exclusive-use arrangement may be needed. Settle insurance and maintenance responsibility at the same time.
Yes, if the system is sized for it. Pumps and compressors draw a surge when they start, so the inverter must handle the starting current as well as the running power. Your installer should check the motor ratings and circuits and design the protection, before quoting.
That depends on who supplies your electricity. Where the City of Cape Town does, its SSEG process applies. Eskom-supplied properties, and those served by another body, may follow a different procedure, so ask your supplier for the current requirement before buying equipment or signing a quote.
It depends on dust, nearby farmland and bird activity. Watch your inverter app: if clear-day output falls against comparable days, the glass may be dirty. Clean with water and a soft brush when the panels are cool, avoid pressure washers, and consider professional cleaning for steep or high roofs.
Often, but under the City’s rules adding batteries is a modification and calls for a new application. The inverter must be able to support them, and the board may need splitting to create an essential-loads circuit. Mention likely batteries at the quote stage so the design leaves room.
Book Your Durbanville Solar Consultation
Fill in your details below and our team will contact you to discuss your solar installation or maintenance needs in Durbanville.
How much does solar installation cost in Durbanville?
It depends on your household’s usage and system size — a small backup system for essentials during load shedding costs far less than a full system covering your whole home. We assess your usage and roof before quoting, so you get an accurate price rather than a generic estimate.
How long does a solar installation take in Durbanville?
Most residential installations take 1 to 3 days on site, depending on system size and roof complexity, plus the time needed for approvals. We’ll give you a clear timeline once we’ve assessed your property.
Durbanville has a lot of established homes and wine estates — does that affect installation?
Not usually a problem, though older Durbanville homes sometimes need DB board upgrades alongside the solar installation to safely handle the new circuits, and we can quote for both in the same visit. We also install on wine estate properties, coordinating around functions and operating hours where needed.
Will solar keep my home running during load shedding?
Yes. A correctly installed and configured solar and battery system will keep your essential circuits running during load shedding, and we handle the City of Cape Town’s SSEG registration and Notice of Completion as part of every installation.
Do you also handle compliance certificates and ongoing maintenance for the system?
Yes. We issue the Solar Certificate of Compliance your installation needs, and we offer ongoing maintenance and fault-finding to keep it performing well for years — whether we installed it or another company did.
Solar Installations & Maintenance in Durbanville
Registered, experienced solar technicians serving Durbanville and the surrounding Cape Town area — installation, compliance, registration and ongoing maintenance.
Other Thermo Services In Durbanville
- Certificate of Compliance Durbanville
- Electrician Durbanville
- Emergency Electrician Durbanville
- Solar Maintenance & Repairs Durbanville
See all Solar Installation areas in Cape Town or everything we offer in the Northern Suburbs.
