Commercial Solar & Battery Installations in Cape Town and the Western Cape

First Energy Solar Installers designs, installs and maintains grid-tied, hybrid and battery-backed solar systems for businesses across Cape Town and the Western Cape – from 30 kW office systems to 430 kW industrial rooftop plants. Every project is engineer-led, built with glass-on-glass panels, and handed over with a Certificate of Compliance and municipal SSEG registration. Since 2019 we have installed more than 1.4 MW of commercial solar capacity for factories, warehouses, office parks, schools and farms in the Western Cape.

Request a free commercial solar assessment – send us 12 months of electricity bills and we will show you exactly what your roof can save.

Numbers first. These are systems we have designed and installed for Cape Town and Western Cape businesses, with the generation each one is expected to deliver (and, where we have it, what the client has actually saved).

What these projects have in common: a load study before the design, glass-on-glass modules, DC strings matched to the client’s daytime demand, and a financial model that was signed off before a single panel went up. Browse all of our solar installations for more.

The honest answer is “it depends on your daytime load”, but you can get a good first estimate from your monthly electricity bill. The brackets below are indicative 2026 prices for grid-tied systems in Cape Town and the Western Cape, excluding VAT and before any Section 12B tax benefit. Your proposal will give you the exact figure, modelled on your own half-hourly data.

Rules of thumb: a well-designed commercial grid-tied system in the Western Cape costs roughly R9,000 – R12,000 per kWp installed, and pays itself back in three to five years at current Cape Town commercial tariffs. Adding battery storage costs from about R4,400 per usable kWh on large systems (roughly R4.4 million for 1 MWh), with smaller batteries costing somewhat more per kWh, and is justified by peak shaving, backup or time-of-use savings rather than by the panels alone. Our commercial battery storage and energy arbitrage page shows where a battery pays for itself and where it does not. See our commercial solar financial modelling page for how we calculate payback, NPV and IRR.

1. Bill and tariff analysis. Send us 12 months of electricity accounts. We identify your tariff (City of Cape Town Small or Large Power User, or Eskom Megaflex/Nightsave), your energy and demand charges, and your seasonal pattern.
2. 7-day load logging. We fit a data logger to your main distribution board for a week to record your real half-hourly demand. The service costs R1,500 ex VAT and is credited back against any system you buy from us.
3. Roof and site survey. Roof type (IBR, Klip-Lok, concrete, tile), structural capacity, orientation and shading, DB and cable routes, and whether a carport or ground mount makes more sense than the roof.
4. System design and financial model. We size the array and inverters to your daytime load, then run the design through our financial model to give you payback period, NPV, IRR, 20-year savings and carbon impact – based on your own data, not industry averages.
5. Proposal and funding. A fixed-price proposal with equipment schedule, production estimate and the finance route that suits you (capital purchase, bank finance, rent-to-own or PPA).
6. Installation. Managed by our engineers and installed by our own teams. A 100 kW system is typically one to two weeks on site; a 300–430 kW system three to five weeks. We work around your operations and plan the grid change-over for a short, agreed window.
7. Compliance and SSEG registration. Electrical Certificate of Compliance, municipal SSEG application and authorisation (City of Cape Town, Stellenbosch, Drakenstein, Overstrand or Eskom), and commissioning with the metering upgrade if you want to export.
8. Handover, thermal scan and monitoring. Every new commercial installation gets a free thermal drone scan of the array and wiring, live monitoring and an optional maintenance plan.

Most commercial and industrial accounts in Cape Town are billed on three things: an energy charge for every kWh you consume (often split into peak, standard and off-peak time-of-use periods), a demand charge for your highest half-hourly kVA draw in the month, and fixed or network charges. Knowing which of these dominates your bill tells you what to install.

• Solar PV cuts the energy charge. A grid-tied system replaces the kWh you would otherwise buy between roughly 08:00 and 17:00 – which is why businesses that run Monday to Friday in daylight hours get the fastest payback.
• Solar alone only partly reduces the kVA demand charge. Your notified maximum demand is set by your peak half-hour. If that peak is at 10:00 on a sunny day, PV will shave it; if it is a 06:00 start-up or a cloudy afternoon, it will not. Battery storage with peak-shaving control is the tool for demand charges.
• Exporting surplus. Businesses on City of Cape Town supply can sell surplus energy back to the City through its Cash for Power programme once a bi-directional AMI meter is installed. We design to maximise self-consumption first and treat export as a bonus.
• Wheeling. Multi-site businesses and large users can buy wheeled renewable energy or wheel their own generation between sites across the municipal grid.

This is why we log your load before we design: a system sized on the bill total alone is almost always too big or too small.

A grid-tied PV system switches off when the grid goes down (by law, to protect line workers). If you need to keep trading through outages, or your bill is dominated by demand charges or evening time-of-use rates, a commercial battery energy storage system (BESS) is worth modelling. We install three-phase hybrid and AC-coupled systems from 30 kWh to several hundred kWh using Sunsynk, Deye, Fox ESS, BYD and Tesla equipment.

• Backup for critical loads – servers, cold rooms, tills, security, lighting and selected machinery, sized to the hours of autonomy you actually need.
• Peak shaving – the battery discharges during your peak half-hours to lower your notified maximum demand and the kVA charge that comes with it.
• Time-of-use arbitrage – charge from solar or off-peak grid, discharge during peak tariff windows.
• Generator reduction – a battery plus solar typically cuts diesel run-time dramatically at sites that still rely on generators.

Read more on high-voltage versus low-voltage batteries and the brands we install.

There are four ways Western Cape businesses fund commercial solar, and we model all of them in the proposal so you can compare on the same basis.

• Capital purchase with the Section 12B tax allowance. Solar PV generating under 1 MW can be written off in full against taxable income in the year it is brought into use (the enhanced 125% allowance ran from 1 March 2023 to 28 February 2025 and has now ended). For a company paying 27% tax, that is effectively a 27% rebate on the installed cost. Details on our clean energy tax incentive page – confirm the treatment with your accountant.
• Bank asset finance. We are an approved installer for Standard Bank Business solar finance and can introduce you to the other major banks’ renewable energy facilities. Repayments are typically structured to be at or below your current electricity saving.
• Rent-to-own. Fixed monthly instalments over three to five years with ownership at the end, no large upfront payment, and the saving starts from day one. See rent-to-own vs solar subscription for how to compare offers.
• Power purchase agreement (PPA). For larger sites, a funder owns the system on your roof and you buy the energy per kWh at a rate below your municipal tariff, with zero capital outlay. See our PPA page.

Full options are on our solar power finance page. Already have a quote from someone else? Our independent proposal review will tell you whether the numbers hold up.

• Manufacturing and industrial – factories and plants in Paarl, Epping, Blackheath, Somerset West and Macassar with large flat roofs and heavy daytime loads (our 430 kW, 300 kW Paarl and 200 kW installations).
• Warehousing and logistics – distribution centres and cold storage where refrigeration runs all day (100 kW warehouse, Macassar).
• Office parks and business parks – multi-tenant buildings in Century City, Muizenberg, Claremont, Bellville and Durbanville (Century City, Muizenberg Business Park).
• Schools and education – see solar for schools; an installer on the WCED solar programme, with systems at Kayamandi High School and Delft Primary School.
• Farms, wine estates and agri-processing – packhouses, cold rooms, irrigation pumping and cellars in the Winelands, Overberg and West Coast. See solar for farms and agri-processing in the Western Cape.
• Retail, hospitality and medical – shopping centres, hotels, guest houses, gyms and clinics with seven-day daytime loads.
• Body corporates and sectional title – common-property solar for estates and apartment blocks; see solar for body corporates.

Our head office is in Kirstenhof in Cape Town’s Southern Suburbs and our technical department is in Somerset West, so we have installation teams on both sides of the metro. We regularly install commercial systems in:

• Cape Town CBD, Atlantic Seaboard and City Bowl – Atlantic Seaboard solar installation
• Southern Suburbs and South Peninsula – Claremont, Kenilworth, Tokai, Muizenberg, Fish Hoek; Constantia solar installation
• Northern Suburbs – Bellville, Brackenfell, Kuils River, Parow, Milnerton; Durbanville solar installation
• Helderberg – Strand, Gordon’s Bay, Macassar; Somerset West solar installation
• Cape Winelands – Franschhoek, Wellington; Stellenbosch and Paarl solar installation
• West Coast and Overberg – Table View, Melkbosstrand, Atlantis, Grabouw, Hermanus and the Overberg

See the full list on our solar in Cape Town page.

• Engineer-led since 2019. Every installation is designed, managed and signed off by qualified engineers, which is why our Certificates of Compliance and SSEG applications go through without drama.
• Glass-on-glass panels as standard. Better fire performance, lower degradation and long warranties – read why glass-glass panels are the safer choice.
• Free thermal drone scan on every new commercial installation to catch hot spots and loose connections before they become a fire risk.
• Your data, not averages. Load logging and tariff analysis before design; payback, NPV and IRR in every proposal.
• Best price guarantee on like-for-like equipment and workmanship – see our best price guarantee.
• After-sales service – monitoring, panel cleaning, annual inspections and firmware support from our Somerset West technical department.

How much does a 100 kW commercial solar system cost in Cape Town?
Indicatively R1.0 million to R1.3 million excluding VAT for a grid-tied system with glass-on-glass panels and two 50 kW inverters, before the Section 12B tax allowance. Roof type, cable runs and whether you add batteries move the price; your proposal gives an exact fixed figure.

What is the payback period for commercial solar in the Western Cape?
Three to five years is typical for a grid-tied system on a business with a strong weekday daytime load. Our 430 kW industrial client saved R1,000,000 in the first 18 months and is on track for payback in under four years. Section 12B shortens this further.

Will solar reduce my kVA demand charge?
Only partly. Solar reduces the kWh you buy; the demand charge is set by your single highest half-hour of kVA draw. If that peak falls in strong sunlight it will drop; if it is an early-morning start-up, it will not. A battery with peak-shaving control is the way to cut demand charges reliably.

Do I need to register a commercial solar system with the City of Cape Town?
Yes. Any grid-connected system must be registered as small-scale embedded generation (SSEG) with the City or your municipality, using an approved inverter on the NRS 097-2-1 list. We prepare and submit the application, arrange the metering change and handle commissioning.

Can my business sell surplus electricity back to the City of Cape Town?
Yes. Commercial customers on City of Cape Town supply can export through the Cash for Power programme once a bi-directional AMI meter is installed; the credit offsets your account and can be paid out above a threshold. We design for self-consumption first because the export rate is lower than the tariff you avoid.

How long does a commercial solar installation take?
Allow three to five working days for the survey and proposal. On site, a 50–100 kW system takes one to two weeks and a 200–430 kW system three to five weeks. Municipal SSEG authorisation typically takes two to four weeks and runs in parallel with the build.

Will my roof carry the panels?
Usually, yes. A glass-on-glass module with rails adds about 15 kg per square metre. We check the roof sheeting, purlins and trusses during the survey and, where needed, obtain a structural engineer’s sign-off. Carports and ground mounts are the alternative where a roof is unsuitable.

Is the Section 12B solar tax incentive still available in 2026?
The enhanced 125% allowance ended on 28 February 2025. The standard Section 12B allowance still applies: solar PV systems under 1 MW can be deducted in full in the year they are brought into use, and larger systems over three years on a 50/30/20 basis. Confirm your position with your accountant.

Can we finance the system instead of paying cash?
Yes. Options include Standard Bank Business solar finance (we are an approved installer), rent-to-own over three to five years, and zero-capex power purchase agreements for larger sites. We model each against a cash purchase so you can compare on the same basis.

What happens during load shedding or a grid outage?
A grid-tied system shuts down automatically when the grid fails. If you need to keep operating, we add a hybrid inverter and battery sized to your critical loads, or integrate the solar with your existing generator so the generator runs far less.

What maintenance does a commercial solar system need?
Panel cleaning once or twice a year (more in dusty or coastal areas), an annual electrical inspection and thermal scan, and continuous online monitoring so under-performance is picked up within days. We offer fixed-price maintenance plans for all commercial systems.

Which areas do you cover for commercial solar installations?
The whole Cape Town metro and the Western Cape: the City Bowl and Atlantic Seaboard, Southern and Northern Suburbs, the Helderberg, Cape Winelands, West Coast and Overberg. Our head office is in Kirstenhof and our technical department in Somerset West.

Tell us about your site below, or email your last 12 months of electricity bills to info@firstenergy.co.za. Within a few working days you will have a preliminary design, an estimated system size and cost, and the projected payback for your business – with no obligation.

For business enquiries anywhere in Cape Town and the Western Cape, call our office on 087 148 2012.