Service areas · City of Johannesburg
Generator Repairs, Servicing and Maintenance Across Johannesburg
We repair, service and maintain generators on site anywhere in the City of Johannesburg: the CBD and inner suburbs, Sandton, Randburg, Roodepoort, Midrand, Fourways and Soweto. Diesel, petrol and gas sets of every make are covered, from a portable unit at home to the standby system in an office tower, and a technician normally arrives within 1–2 hours.
Established 2006
20 years of experience
24/7 operations
We Arrive Within 1–2 Hours
(usually within 1 hour)
Free callouts and quotations
One-year warranty
Qualified and certified technicians
We Service & Repair All Generator Brands
All generator makes and models
1 kVA–20,000 kVA capability
Local pages
Johannesburg areas with their own page
Sandton: Sandton generator repairs
Office towers, hotels and data rooms around the Sandton CBD, business parks in Rivonia, Sunninghill and Woodmead, and home standby sets in Bryanston and Morningside.
Randburg: Randburg generator repairs
Shops and offices in Ferndale and Cresta, hillside homes in Northcliff and Linden, and the workshops of Strijdom Park and Kya Sand.
Roodepoort: Roodepoort generator repairs
The western edge of the city: older homes in Florida, offices in Constantia Kloof, estates in Wilgeheuwel and Little Falls, and light industry.
Midrand: Midrand generator repairs
Office campuses, data and logistics facilities and residential estates between Johannesburg and Pretoria, where standby power is often critical.
Fourways: Fourways generator repairs
Security estates, townhouse complexes, retail centres and smallholdings on the northern edge of the city.
Soweto: Soweto generator repairs
Homes, spaza shops, churches, schools and small businesses in the south-west, with generators from portable petrol units to small diesel sets.
Inner city
Generators in a high-rise city
In the taller buildings of the CBD, Braamfontein and Rosebank, the generator is seldom out in the open. It usually sits in a basement, on a parking level or in a rooftop plant room, often with a day tank topped up from a bulk tank by a transfer pump, a radiator that breathes through ducts, and an exhaust that may climb several floors. In these buildings the fault is often in the installation around the set rather than in the engine: a transfer pump or float switch that lets the day tank run dry partway through a long outage, a radiator that draws its own hot air back in, or an exhaust run with too much back pressure.
The load is different too. Lifts, booster pumps and air-handling fans start in steps, and each step asks the governor and the AVR to recover speed and voltage quickly. A set that is tired, under-serviced or sized for a smaller building shows it here first, as flickering lights, lifts that stall between floors, or a controller that trips the set on under-frequency.
- Day tanks, transfer pumps and level switches
- Ducted radiators and plant-room ventilation
- Exhaust runs and back pressure
- Step loads from lifts and pumps
Where Johannesburg relies on generators
| Where | What the generator does | What we check first |
|---|---|---|
| Office and apartment blocks in the CBD, Braamfontein and Rosebank | What the generator doesWhole-building standby for lifts, water pumps, lighting, access control and IT, through an automatic changeover | What we check firstStart batteries and charger, day-tank supply, changeover timing, and how the set copes with lift starts |
| Hospitals, clinics and care homes, in Parktown and across the city | What the generator doesCritical standby that must start and take the load within seconds, with a UPS carrying the most sensitive equipment | What we check firstStart reliability, transfer time, frequency stability for the UPS, and the record of test runs |
| Homes in Melville, Kensington and the other older suburbs | What the generator doesA silent diesel, petrol or inverter unit for lights, Wi-Fi, gates, alarms and fridges, often squeezed into a small yard | What we check firstAirflow, exhaust clearance from windows and doors, battery condition and the changeover wiring |
| Warehouses and workshops in City Deep and Booysens | What the generator doesLarger three-phase standby sets for cold rooms, compressors, conveyors and offices | What we check firstLoad balance across the phases, motor starting, cooling-system condition and fuel quality |
| Homes, shops and churches in Soweto and the south-west | What the generator doesPortable petrol units and small diesel sets, started manually when the power goes | What we check firstFuel left standing in carburettors, AVR faults, and a safe connection that cannot back-feed the network |
Power cuts in Johannesburg are not all load shedding
City Power supplies most of Johannesburg, while Eskom supplies some areas directly, including much of Soweto. Each publishes its own load-shedding schedule, so two suburbs a few kilometres apart can lose power at different times. Many outages in the city are local rather than scheduled: a cable stolen or dug up, a substation or mini-substation that fails, or lines brought down in a summer thunderstorm.
Local faults are the hardest on a generator because nobody knows how long they will last. A set that copes easily with a two-hour load-shedding slot may have to run through the night after a substation fault, and that tests the fuel supply, cooling and oil in a way short runs never do. Diesel sets that run for long periods on a light load can also suffer from wet stacking. Regular generator servicing, and a maintenance plan that includes test runs under load, are what keep a set ready for the long outage as well as the short one. If it has already failed, our generator repairs page explains how we find the fault.
Before we visit a Johannesburg building
A few details sent ahead make a visit to an office, apartment block or hospital much quicker:
- Who authorises contractor access, and whether a permit to work or an induction is needed
- Where the set is (basement, parking level, roof or yard) and any height limit on the parking entrance
- Whether a test that transfers the building onto the generator is allowed, and at what time
- The make, model and kVA rating, the hour-meter reading and a photo of the controller screen
- What else runs from the generator supply: lifts, fire systems, a UPS or server room
- Any alarm codes, warning lights or recent changes to the building’s electrical installation
More on getting ready in preparing for a technician visit.
Coverage
Towns and areas in Johannesburg
- Johannesburg CBDOffice towers, banks, government buildings and converted residential blocks
- BraamfonteinOffices, student residences and the Wits University precinct
- RosebankOffices, hotels, shopping centres and apartments around the Gautrain station
- Parktown and HoughtonLarge older homes, schools, hospitals and head offices
- Melrose and IllovoOffice parks, apartment blocks and Melrose Arch
- Melville and Auckland ParkHomes on small stands, restaurants, media houses and a university campus
- Kensington and Bezuidenhout ValleyEstablished eastern suburbs with older homes and small businesses
- City Deep and BooysensIndustrial, logistics and rail freight areas south of the CBD
- Rosettenville and TurffonteinSouthern suburbs with homes, churches and small businesses
- Mondeor and GlenvistaSouthern suburbs near the Klipriviersberg hills
- LenasiaSouth-western suburb with homes, schools, shops and places of worship
Service areas
Other areas we cover
FAQ
Frequently asked questions
Which parts of Johannesburg do you cover?
Does it matter whether our building is on City Power or Eskom supply?
Not to the generator itself: the changeover only senses whether a healthy mains supply is present. What differs is when outages happen, because City Power and Eskom publish separate load-shedding schedules and repair their own faults. Check your supplier’s schedule and plan for the longest outage you are likely to see, not the shortest.
Do you work on generators in office and apartment buildings?
Yes, including sets in basements, on parking levels and in rooftop plant rooms, and paralleled sets that share the load. Tell us about access and permits when you book, and we agree with building management when a test may interrupt the power.
Our building’s generator has not run in months. What should we do?
Have it serviced and tested before the next outage. Batteries go flat, chargers fail, diesel collects water and the changeover can stick while a set stands unused. A service with a test run under load shows whether it will take over when it is needed. See generator maintenance.
Can you look after generators at several sites across the city?
Yes. Property managers, schools, churches and businesses often have sets in more than one suburb. A maintenance plan puts them on one schedule of services and test runs, with a record kept for each set.
Do you also work outside Johannesburg?
Yes, across Gauteng: Ekurhuleni, Pretoria and Centurion, the West Rand and the Vaal Triangle.
Related pages
Who we work for
Need a generator technician?
- 24/7 operations
- We Arrive Within 1–2 Hours (usually within 1 hour)
- Free callouts and quotations