Load shedding has made solar one of the most-searched electrical topics in Cape Town, and it’s easy to see why – a well-designed system can keep your home running through an outage and cut your monthly Eskom bill at the same time. Here’s what actually goes into a residential solar installation, what it costs, and what you need to know before you commit.
Grid-tied, off-grid, or hybrid?
Grid-tied systems feed excess power back into the municipal grid and are the cheapest option, but they typically switch off during load shedding unless paired with battery storage – a common misconception that catches homeowners out. Off-grid systems run entirely on solar and battery storage, disconnected from Eskom, and are rare for suburban homes given the cost. Hybrid systems – solar panels plus battery storage plus a grid connection – are what most Cape Town homeowners actually install, because they keep essential circuits running through an outage while still drawing from the grid when needed.
What’s involved in installation
A typical residential install includes a site assessment (roof orientation, shading, roof condition and structural load), panel and inverter sizing based on your actual usage, the physical installation of panels, inverter and battery, and wiring into your DB board – usually with a sub-board for the circuits you want protected during an outage (lights, wifi, fridge, and so on).
Do you need a compliance certificate for solar?
Yes. Any grid-tied solar installation in Cape Town needs an Electrical Certificate of Compliance for the installation itself, and grid-tied systems also need to be registered with the City of Cape Town under its small-scale embedded generation (SSEG) process. Skipping this step can cause problems later – when you sell the property, when you claim on insurance, or if the City identifies an unregistered system feeding back into the grid. We handle both the CoC and the registration paperwork as part of every grid-tied installation.
What affects the cost
System cost depends mainly on three things: how much of your usage you want covered (a few essential circuits versus the whole house), battery capacity (batteries are usually the single biggest cost item), and roof complexity (a simple, unshaded north-facing roof costs less to fit than a shaded or multi-angle roof). We provide a free, no-obligation quote based on your actual usage and roof, rather than a generic package price.
Choosing an installer
Look for a registered electrical contractor who issues a proper CoC, handles the SSEG registration for you, and is transparent about battery brand and warranty – battery quality varies significantly and is where cost-cutting shows up first.
Frequently asked questions
How long does a residential solar installation take?
Most straightforward residential installs take one to two days on site, though SSEG registration with the City can take several weeks to process.
Will solar work during load shedding without a battery?
No – a grid-tied system with no battery storage is required by regulation to shut down during a grid outage, including load shedding, for safety reasons. You need battery storage to keep power flowing during an outage.
Can I add battery storage to an existing solar system later?
In most cases yes, depending on your existing inverter’s compatibility. We can assess an existing system and quote on a battery retrofit.
Ready to talk through a solar installation for your home? See our solar installation service or get a free quote.