Businesses
Generator Repairs and Maintenance for Businesses
We repair, service and maintain the generators that keep businesses trading through load shedding and power cuts: shops, offices, restaurants, clinics, cold rooms, server rooms, filling stations and schools across Gauteng. A business generator only earns its keep if it starts, transfers and carries the load every time, so we test it the way an outage will and book work that interrupts power outside your trading hours. We operate 24/7 and normally arrive within 1–2 hours for a breakdown.
- Standby sets, changeovers and UPS-backed loads
- Maintenance plans for one site or many
- Testing and servicing outside trading hours
- Mixed fleets of any make on one schedule
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
What a power cut really costs a business
When the supply fails and the generator does not take over, the tills, card machines and lights go off, and the alarm and access control start running down their backup batteries. Customers walk out, staff stand idle, and in a food or medical business the cold chain starts to warm. Other costs arrive later: stock written off, a server that shut down mid-write, a security gap overnight or a tenant asking why the backup failed.
Load shedding at least came with a schedule. Many outages do not: a cable theft, a substation fault or a Highveld thunderstorm can cut the supply at any hour. Continuity depends on four things happening with nobody present: the mains failure is sensed, the engine starts, the load transfers, and there is enough fuel and cooling to keep going for as long as the outage lasts.
Most business generators are diesel sets on automatic standby, and they need testing that goes beyond a start. A set that runs happily on its weekly exercise can still fail to transfer, trip when the cold-room compressors start, or run dry on the second day of a long outage. Regular generator servicing keeps the engine healthy, a maintenance plan proves the whole sequence, and generator repairs put right what the tests find.
By business
What the generator carries, business by business
Shops and supermarkets
Tills, card machines, lighting, alarms and refrigeration. Open fridges lose temperature fast, and compressors restarting together after a transfer can trip an undersized set.
Restaurants and takeaways
Extraction, cold rooms, point of sale and lighting. Gas cooking still needs the electric extraction running to be safe, so the extraction belongs on the generator circuit.
Offices
Networks, computers, access control, lighting and sometimes lifts. A UPS carries the IT through the seconds before the generator transfers.
Server and comms rooms
A UPS draws a distorted current through its rectifier, and many UPSs refuse a supply whose voltage or frequency drifts or changes too quickly. A generator with a weak AVR or a sluggish governor may be rejected, leaving the UPS on battery until it runs flat.
Clinics, practices and pharmacies
Vaccine and medicine fridges, sterilisers, examination lights and patient records. Steady voltage and fridge temperatures matter here more than almost anywhere.
Cold rooms and butcheries
Large compressors with heavy starting currents. A set sized for the surge, and compressors that restart in turn, prevent a trip just when the cold room needs power most.
Filling stations
Pumps, payment systems, the shop and canopy lighting. Where the generator stands relative to the forecourt’s hazardous areas is fixed at installation, not moved casually.
Schools
Lighting, security, IT and water pumps. Sets stand idle through the holidays, so flat batteries and old fuel are common when term starts.
Shared buildings and centres
One set may serve several tenants and the common areas. Tests that interrupt power need notice to every tenant, and someone must own the schedule.
Who looks after the generator?
| Arrangement | Who usually books the work | Points to agree |
|---|---|---|
| Tenant-owned set | Who usually books the workThe tenant | Points to agreeAccess to the set and the building’s changeover, and who stores and orders fuel |
| Landlord-owned set serving tenants | Who usually books the workThe landlord or managing agent | Points to agreeNotice before tests that interrupt power, and how tenants report a failed transfer after hours |
| Managed by a facilities manager | Who usually books the workThe facilities manager, for the owner | Points to agreeWho approves quotations, who receives visit records, and who holds keys at night |
| Chain or franchise with several branches | Who usually books the workHead office or a regional manager | Points to agreeOne schedule for every branch, consistent records and one contact for breakdowns |
Whoever books it, the work is quoted before it starts, and we agree up front who receives the record of each visit.
Testing a business generator without stopping trade
The most useful test is a simulated mains failure: the incoming supply is switched off, the controller senses it, starts the set and transfers the building, and we watch the start, the voltage and frequency, and the changeover itself. Where it is safe and agreed, this happens before opening, after closing or at a weekend, with UPS-backed systems checked first.
Where the building load is too light to prove the set, or the business cannot go onto generator power at all, a load bank test loads the generator artificially while it is isolated from the building. Load bank testing is arranged and quoted for each site.
- Tests timed around trading hours, with notice to tenants
- Readings recorded so each test can be compared with the last
- Changeover and interlocks checked, never bypassed
What a business maintenance plan should spell out
A maintenance plan only protects you if everyone knows what it covers. Before you agree one, make sure it answers these questions.
- Which generators and sites are covered, with the make, model and kVA of each
- When services fall due, by running hours and by date, and who reads the hour meter between visits
- Which visits include a mains-failure test or a load test, and when they can happen
- Who on site gets notice, who provides access, and who holds keys after hours
- Who orders fuel, and how much must be on site for the longest outage you plan for
- Who receives the record of each visit and approves quotations for faults found
- How a breakdown is reported at night or over a weekend
Visit records show what was done and found. They are a record of work, not a compliance certificate; if an insurer or landlord asks for something specific, tell us when we quote.
Several branches, one schedule
Retail chains, franchise groups, medical practices and property portfolios often have a generator at every site, and rarely the same one. One branch may have a small silent diesel with a SmartGen controller, another a larger set with a Deep Sea Electronics module and a separate changeover panel. We Service & Repair All Generator Brands, so a mixed fleet can sit on one plan, with each set serviced to its own manual.
One schedule makes due dates visible across every site. Records kept per generator show patterns a single visit cannot, such as the branch that always runs low on fuel or the set that needs a new battery every year. With one point of contact, a store manager knows exactly who to call. We cover all five Gauteng regions.
FAQ
Frequently asked questions
Can you service our generator outside trading hours?
Yes. We operate 24/7, so services and tests that interrupt power can be booked before opening, after closing or at weekends. Work that leaves the mains on can be done in the day, as long as you accept the building has no backup while the set is out of service.
Should our business generator be on a maintenance plan?
If an outage would cost you sales, stock or safety, yes. A plan keeps services on time and adds the transfer tests and checks that prove the set will take over. See generator maintenance.
Do we need a UPS as well as a generator?
For computers, servers, tills and equipment that cannot tolerate even a short break, yes. A generator needs at least several seconds to sense the failure, start and transfer, and a UPS covers that gap. The generator must also give the UPS a steady enough supply to accept.
Our landlord owns the generator. Can we still call you?
Yes, to report a fault or ask for a check. Quoted work normally needs the owner’s or managing agent’s approval, and access to the set and the changeover, so let them know you have called us.
We have added equipment since the generator was installed. Is it still big enough?
Possibly not: an extra cold room, air conditioning or more computers add up. We can measure the load on each phase while the set runs and compare it with its rating, allowing for compressor and motor starting surges. See the kVA sizing guide.
Can you take over a generator another company used to maintain?
Yes, whatever the make. Send the make, model, kVA rating and hour-meter reading, with any previous service records. The first visit records the set’s condition and when each item is next due, and anything that needs attention is quoted before work starts.
Related pages
Related services
Related generator problems
Generator types
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