How we size backup power without guesswork
A good backup system starts with a proper assessment. We look at which circuits must stay on, how much power those circuits draw, and how long the backup should last during an outage. That includes checking whether the property is single phase or three phase, whether there is enough wall space for equipment, and whether the electrical board can support the changeover or essential circuit arrangement.
We work with inverters and lithium batteries because they offer a practical balance of efficiency, usable capacity and day to day reliability. In many homes, a smaller system can cover the essentials quite well. In commercial spaces, the answer may be a larger battery bank, more careful load separation or a staged expansion plan. On coastal or humid sites, we also pay attention to ventilation and enclosure placement so equipment is not stressed by heat or damp conditions.
- Site assessments for homes, offices and light commercial spaces
- Backup sizing based on actual loads and outage needs
- Essential circuit planning for lights, plugs and internet
- Battery expansion planning for future growth
Installed properly, signed off properly
Backup power is only useful when it is installed correctly. All installations must be done by a registered electrician, and a certificate of compliance is required for the electrical work. Where a system is grid-tied, municipal registration is also needed. We work with those requirements from the start so the job is done properly and the paperwork is not left hanging at the end.
Our services include inverter installation, battery installation, essential circuit wiring, changeover solutions and system commissioning. We also support compliance work and monitoring setup where required. That means checking polarity, protection devices, cable sizing, isolation and the final test sequence before handover. It sounds basic, but these steps are where many problems are avoided. A tidy install is easier to maintain, easier to fault find and safer for the people using it every day.
Share what must stay on during an outage and the size of the property, and a backup planner will phone or message you.
Contact formBuilt around the realities of South African power cuts
PowerCut designs backup power that is easy to understand and easy to live with. In South Africa, load-shedding is not just an inconvenience, it affects working hours, security systems, internet access, point of sale equipment and everyday family routines. We have built our service around that reality, helping clients choose inverter and lithium battery solutions that keep essential loads running without overcomplicating the job.
We serve residential and commercial clients from Randburg and across Johannesburg, Pretoria, Centurion, Midrand, Roodepoort, Sandton and Fourways. Some customers want only the basics covered, like lights, Wi-Fi and a few plugs. Others need a fuller setup for offices, small shops, medical rooms or home workspaces. Our job is to match the system to the load, the budget and the site conditions, not to oversize or guess.
Support across Gauteng, from first call to aftercare
Our base in Randburg puts us close to the areas we serve most often, including Johannesburg, Pretoria, Centurion, Midrand, Roodepoort, Sandton and Fourways. We work with homes, offices, retail spaces and other businesses that need backup power during load-shedding or unexpected outages. Because every property is different, we treat each job as a specific electrical problem to be solved, not a standard package to be pushed out.
After installation, we remain available for routine servicing, battery expansion advice, commissioning checks and fault investigations. Lithium batteries and inverters are generally low maintenance compared with older backup options, but they still need proper setup and periodic attention. Fans, cabling, battery health and loading all matter. When those details are handled well, the system is far easier to live with and less likely to give trouble when the power goes off again.
At PowerCut, the aim is simple: keep the essential power on, keep the installation compliant, and keep the process clear from start to finish. That is what clients expect from a local supplier, and it is what we work towards on every project.
A team that keeps the process clear
PowerCut is led by Sifiso Ngobeni, with a team that handles the work from first enquiry to final handover. Ayesha Ntuli manages operations, Marnus Rabie leads technical sales, Nompumelelo Sigcau coordinates projects, Sibusiso Govender plans service visits and Rentia Fouche looks after customer support. Each person has a clear role, which helps us keep communication direct and the process moving.
Clients usually reach us through the enquiry form on our contact page, then we arrange the next step based on the property and the kind of backup needed. Sometimes the customer already knows what equipment is in place and needs an expansion or fault check. Other times we start from the beginning with a site visit and a simple load review. Either way, we keep the advice practical and the next actions clear, so people know what is being done and why.
- Clear project planning from enquiry to commissioning
- Fault checks and routine servicing for existing systems
- Support for monitoring setup and battery expansions
- Simple communication with one point of contact
What we value on every job
We value honesty, neat workmanship and systems that are sized for real use. That means we do not push a bigger setup than a client needs, and we do not leave people with a half explained installation. Backup power should be dependable and straightforward, especially when the grid is unstable and everyone in the home or business is counting on it. We would rather explain the limits of a system clearly than promise more than it can do.
We also respect the practical side of South African properties. Some sites have old wiring, some have limited space, and some need careful phasing in stages because the load is too high for a single step change. In those cases we advise on the order of work, what can be covered now and what can wait for later. That approach helps clients make sensible decisions without pressure, and it keeps the system working well over time.