Commercial generators
Commercial Generator Repairs Across Gauteng
We diagnose and repair commercial standby generators on site for offices, shops, restaurants, body corporates, warehouses and workshops across Gauteng. If your set fails to start, transfer or carry the building during an outage, call us at any hour: we are open 24/7, arrive within 1 hour for breakdowns and give you a written quote before any work starts. Planned servicing and maintenance contracts for business premises are on our commercial generator servicing and maintenance page.
Callout fee waived when you accept our written quote. 1-year workmanship guarantee. See prices
- Open 24/7, arrive within 1 hour
- ATS and auto-start faults
- Written quote before work
- 1-year workmanship guarantee
- Onsite across Gauteng
Business premises
Commercial standby generators, repaired on site
Commercial generator faults show up at the worst moment. The set did not start when the mains failed, it started but never took the building, or it tripped once the tills, lights and air-conditioning came on. We start from that symptom and test the battery, controller, ATS, fuel and output in turn until we can show you the cause.
Most commercial sets are diesel, with an automatic transfer switch and a Deep Sea, SmartGen or Datakom controller, installed in a plant room, a yard or a basement. Tell us about access, who will meet us on site and whether the mains is off right now, so we arrive ready for the fault.
Once the fault is fixed, a load bank test can prove the set will carry your building before the next outage does it for you; keeping it ready after that is covered on our commercial servicing and maintenance page. We have repaired generators across Gauteng since 2000.
The commercial visit
Diesel standby, automatic start and looking after the set
Commercial diesel generator repairs
We fix fuel, starting, cooling and output faults on the diesel sets that carry offices and retail. We service and repair Cummins, Perkins, Caterpillar, FG Wilson and Volvo Penta generators.
Standby generator repairs
A set that sits for weeks usually fails on a flat battery, old fuel or a controller that was already in alarm. We check all three before anything else.
ATS and automatic start problems
When the set runs and the building stays dark, we test the start signal and the transfer switch together, so you know exactly which one let you down.
Generator controller repairs
We read the alarm that stopped an overnight start, trace the circuit behind it and fix the cause, so the set starts next time without anyone at the panel.
Servicing and maintenance plans
Booked services, maintenance contracts and SLAs for business premises have their own page, commercial generator servicing and maintenance, so a breakdown visit stays focused on the fault.
Load testing
A start in the plant room does not prove the set can run your tenants or tills. A load bank test applies a controlled load and shows whether voltage, frequency and temperature hold.
Generator sizes
Most commercial sets fall between about 30 kVA and 500 kVA. Read the rating from the data plate, because the canopy size tells you very little.
Commercial generator callouts
Send the suburb, a site contact, the fuel type and the fault. That is enough for us to plan the visit and bring the parts the fault is likely to need.
Running a business generator
What different premises need from a standby set
A business generator is judged on the one day it is needed. These are the points we check for each kind of site.
Office and retail standby sets
You usually have a diesel set with automatic changeover. The start signal, the transfer and the battery matter as much as the engine, so we check all three on every planned visit.
Body corporates and estates
Your set may run gates, lifts, borehole pumps or common lighting. We work through the managing agent, trustees or caretaker and give notice before any test that affects residents.
Schools and facilities
Sets that stand idle through holidays still age. Batteries, coolant and stored diesel deteriorate even when the hour meter barely moves, so we book visits by the calendar as well as by hours.
Restaurants and food retail
Fridges, cold rooms and extraction fans draw a surge when they start. We check that your set picks up that load cleanly, because a stalled transfer can cost you a cold room of stock.
Emergency repairs for businesses
When the set fails during an outage, call 082 057 4605 with the suburb, a site contact, the fuel and the alarm. We are open 24/7 and arrive within 1 hour. After-hours callouts cost R700 to R1,400, waived if you accept our quotation.
What a quotation needs
Send the make, model and kVA, the running hours, the last service date, access details and who will be on site. A data-plate photo on WhatsApp saves time for both of us.
Servicing and maintenance
Planned work for facilities managers and body corporates
This page is about breakdowns and faults. Planned servicing, contracts and records have their own page, so here is what you will find there.
Planned servicing around trading hours
Services are booked for early mornings, evenings or weekends, when the building can manage without backup for a while.
Contracts and SLAs per site
Customised maintenance contracts and SLAs, written for each building after we assess the set, with no fixed packages or prices.
Records for landlord, trustees and insurer
Each planned visit is recorded, from the running hours to the parts fitted and the readings taken, ready to pass on.
For shared sets at sectional-title schemes and estates, see body corporate generator maintenance.
Related Pages
Repairs, size, controls and callouts
- Commercial Servicing & Maintenance Planned visits, contracts and SLAs for business premises
- Generator Repairs The core repair service
- Generator Servicing The general servicing page
- Generator Maintenance Contracts and SLAs in general
- Body Corporate Maintenance Contracts and records for trustees
- Generator Sizes kVA for a business load
- Makes & Models Engine and alternator brands we repair
- ATS Repairs Automatic transfer
- Load Bank Testing Prove a commercial load
- Generator Callouts How we book your visit
- Industrial Generator Repairs Larger plant and heavy standby
- Diesel Generator Repairs The usual commercial fuel
- Generator Installation New standby sets and changeover
- Generator Fault Finding Diagnosis before parts
- Generator Controllers Alarms on a commercial set
Common Questions
Questions about commercial generator repairs
What is a commercial generator repair?
A commercial generator repair fixes the standby generator that powers a business premises, such as an office, shop, restaurant, complex, warehouse or workshop. Most of these are diesel sets with automatic start and an ATS.
How quickly do you respond to a commercial breakdown?
We are open 24 hours a day, 7 days a week, including weekends and public holidays, and arrive within 1 hour for breakdowns. Call or WhatsApp 082 057 4605 with the suburb and the fault. Maintenance contract clients are scheduled ahead of new callouts.
Can you repair a breakdown after hours?
Yes. We are open 24/7, so a set that fails in the evening, overnight or over a weekend is attended then. After-hours callouts cost R700 to R1,400. The callout fee is only payable if you do not accept the quotation. If you accept the quotation, the callout fee is waived.
Do you work on body corporate and complex generators?
Yes. We repair and maintain shared standby generators for sectional-title schemes and estates, with access arranged through the managing agent, trustees or caretaker. Our body corporate maintenance page explains contracts, records for trustees and how to compare quotes.
Is commercial the same as industrial?
No. Commercial covers business premises and the standby set for that building. Industrial covers large three-phase plant on factories and production sites, often with prime-power duty and planned shutdown windows.
The generator did not start when the power went off. Can you look at that?
Yes. We test automatic start, the battery and the ATS first, because those three are the usual reasons a standby set stays silent when the power goes.
Do you service commercial generators as well as repair them?
Yes. Planned servicing and maintenance have their own page: commercial generator servicing & maintenance.
Can you test whether it will carry the building?
Yes. A load bank test applies a controlled load and records voltage, frequency and temperature as the set works. Our cost guide puts load bank testing at R2,800 to R5,500, and your written quote gives the exact figure.
Which brands do you repair?
We service and repair Cummins, Perkins, Caterpillar, FG Wilson, Volvo Penta, Deutz, SDMO, Kohler, Mahindra and Yuchai generators, Stamford alternators and Deep Sea controllers. We also work on SmartGen and Datakom controllers. Send a photo of the data plate and we match parts before we visit.
Which areas do you cover?
We cover Johannesburg, Pretoria, Sandton, Centurion, Midrand, Randburg, Roodepoort, the East Rand, the West Rand and the Vaal, including the business parks and industrial areas in those regions.
Still unsure what the fault is? Call or WhatsApp 082 057 4605 for onsite diagnosis.
Service Areas
Onsite visits across Gauteng
We come to your generator anywhere in Gauteng, 24/7. Choose your region for local suburbs, call-out details and the faults we see most there.
What to send before we attend
These details help us plan the visit and bring the right parts. Send what you can on WhatsApp; if you can’t find the model number, we still book the visit.
- Location
- The suburb or site, so the visit can be booked in the right area.
- Make and model
- The generator brand and model, if they are known.
- kVA
- The size printed on the data plate.
- Fuel type
- Diesel, petrol, LPG, natural gas, or dual-fuel.
- Controller model
- The module name on the panel, when it is visible.
- Fault or alarm
- What the set does, and any text on the screen.
- Photos
- The generator, the data plate, and the controller or alarm. Send these on WhatsApp.
Book a Visit
Book a commercial visit
Tell us the type of premises, the suburb, the generator size and whether it failed to start, failed to transfer or failed under load. We come back to you with the next step and a written quote before any work starts.
- Call
- 082 057 4605
- Message us on WhatsApp
What happens next
- We reply with questions about the generator, or to book a visit.
- A technician comes to you. For a breakdown we arrive within 1 hour.
- The fault is diagnosed on site and you get a written quote. No work starts until you accept it.
Charlie, lead technician: Degree in Mechanical Engineering, Degree in Electrical Engineering, Diesel Plant Fitter. Generator specialists since 2000.