Generator brands
Every Generator Brand, Repaired and Serviced
We Service & Repair All Generator Brands, on site across Gauteng. That covers complete sets from builders such as Cummins, Caterpillar and FG Wilson; the Perkins, Volvo Penta and Deutz engines fitted by many other builders; Stamford and Leroy-Somer alternators; Deep Sea and ComAp controllers; and portable Honda and Yamaha units. Most generators combine several makers’ parts, so if your brand is not listed below, we work on it from the engine, alternator and controller plates.
- Complete generator sets: named on the canopy or base frame
- Engines: named on the engine data plate
- Alternators: named on the alternator housing plate
- Controllers: named on the front of the module
- Portable and petrol: named on the casing, frame or fuel tank
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
One generator, several brands
| Part | Brand pages | Where its name is | What it decides |
|---|---|---|---|
| Generator set | Brand pagesCummins, FG Wilson, SDMO, Generac | Where its name isNameplate on the canopy, base frame or control panel door: model, serial number, kVA rating, voltage and phases | What it decidesWiring, enclosure, base fuel tank, control panel layout and the set’s documentation |
| Engine | Brand pagesPerkins, Volvo Penta, Deutz, Doosan | Where its name isData plate on the engine block or rocker cover: engine model and serial number | What it decidesOil and filters, the fuel injection system, cooling, the governor and most mechanical repairs |
| Alternator | Brand pagesStamford, Leroy-Somer, Mecc Alte | Where its name isPlate on the alternator housing or terminal box: frame, serial number, rated kVA, voltage and excitation | What it decidesThe AVR, exciter, rotating diodes, bearings and rewinding |
| Controller | Brand pagesDeep Sea (DSE), ComAp, SmartGen | Where its name isThe front of the module; the model is printed there or on a label at the back | What it decidesAutomatic starting, alarms and shutdowns, mains sensing and the signal to the changeover |
Two sets with different names on the canopy can share the same engine and alternator, and two sets with the same name can differ inside. That is why the plates, not the canopy, decide which parts fit.
How to read the data plates
- 01
The set nameplate
On the outside of the canopy, the base frame or the inside of the control panel door, depending on the builder. It gives the builder, model and serial number, the rating in kVA and kW, the voltage, phases and frequency, and often whether the rating is standby or prime.
- 02
The engine plate
A small plate or label on the side of the block or on the rocker cover. Open the canopy only with the set stopped, the engine cool and the controller set to stop or off, because a standby set left in auto can start by itself when the mains fails. The engine model and serial number identify filters, gaskets and injection parts.
- 03
The alternator plate
On the alternator housing or terminal box, usually at the opposite end of the set from the radiator. It names the maker and frame, with the rated output, voltage, power factor and speed, and often the excitation type or AVR fitted.
- 04
The controller screen
The controller’s make is printed on its front. Photograph the screen as it is, including any alarm, before anyone resets it: the alarm text tells us which part to check first (see controller alarms explained), and the running hours show how far the set is from its next service.
Complete generator sets
- CumminsUnited StatesCummins-built sets and Cummins-engined generators: B to QSK-series engines, fuel systems and PowerCommand controls.
- Caterpillar (Cat)United StatesCat standby and prime-power sets: C-series, 3500 and C175 engines, EMCP controls and large alternators.
- FG WilsonUnited KingdomPerkins-powered FG Wilson standby sets: engine, PowerWizard controls, alternator, canopy and base tank.
- SDMO and KohlerFranceFrench-built SDMO and Kohler-SDMO sets with engines from several makers, plus Kohler home standby units.
- Atlas CopcoSwedenQAS mobile and QES sets from construction, mining and hire work: repairs, servicing and site checks.
- HimoinsaSpainSpanish-built sets with engines from several makers and Himoinsa’s own control panels.
- PramacItalyItalian-built stationary diesel sets and portable generators, now part of the Generac group.
- GeneracUnited StatesGas-fuelled Generac home standby units: engine, controller, transfer switch and servicing.
Engines
- PerkinsUnited KingdomPerkins 400 to 4000-series diesel engines in FG Wilson and independently built sets.
- Volvo PentaSwedenTAD and TWD-series genset engines with electronic engine management, in SDMO and other sets.
- DeutzGermanyAir-cooled, oil-cooled and water-cooled Deutz diesels in generator sets and equipment.
- John DeereUnited StatesPowerTech 3029 to 6135 engines in farm, standby and commercial generators.
- KubotaJapanSmall water-cooled Kubota diesels in compact silent sets for homes, small businesses and telecom sites.
- YanmarJapanAir-cooled single-cylinder engines in portable diesels, and water-cooled TNV engines in compact silent sets.
- MTUGermanySeries 1600, 2000 and 4000 engines in large standby and prime power sets for critical sites.
- DoosanSouth KoreaDoosan P and DP-series diesels in mid-to-large standby and prime sets from many builders.
Alternators
- StamfordUnited KingdomStamford alternators: AVR faults, PMG and self-excited machines, diodes, bearings and windings.
- Leroy-SomerFranceLeroy-Somer alternators with SHUNT, AREP or PMG excitation, and the regulators that suit each.
- Mecc AlteItalyItalian alternators, from small capacitor-regulated machines to three-phase ECP and ECO machines.
Controllers
- Deep Sea Electronics (DSE)United KingdomDSE module faults, false alarms, auto-start and mains sensing problems, and module replacement.
- ComApCzech RepublicInteliLite, InteliGen and InteliSys controllers on single standby sets and paralleled plants.
- SmartGenChinaHGM-series controllers, chargers and ATS controllers on imported and refurbished sets.
Portable and petrol
- HondaJapanEU-series inverters, conventional Honda generators and other builders’ sets with a Honda GX engine.
- YamahaJapanEF-series inverter and conventional Yamaha petrol generators for homes, leisure and small businesses.
- RyobiOpen-frame Ryobi petrol generators for home backup, DIY and outdoor work.
- Mac AfricSouth AfricaPetrol and small diesel generators from a South African tools brand, repaired and serviced on site.
- KiporChinaKDE silent diesels, petrol and inverter generators, repaired and serviced on site.
- LutianChinaOpen-frame Lutian petrol generators: starting, speed and output faults, and servicing.
Other brands we work on
Engine makes
- Baudouin
- Mitsubishi
- Scania
- Iveco (FPT)
- Lister Petter
- Weichai
- Yuchai
- Hatz
- Lombardini
- Briggs & Stratton (Vanguard)
Set and portable generator brands
- Bundu Power
- Turner Morris
- Dellent
- Ellies
- Magnum
- Firman
- Steco
- Ecco
- Pro-Power
- Coelmo
- Zest
- Grip
What the brand changes about the work
Parts: Generator repairs
We identify parts from the engine plate and serial number and the alternator plate, not the canopy name, and fit genuine or quality-equivalent parts as the job suits. Parts for older or less common sets can take longer; we say so when we quote.
Service schedule: Generator servicing
Oil grade, filter types and intervals come from the engine maker’s schedule, counted in running hours and at least once a year. Heavy load shedding brings the hours interval round far sooner than test runs alone.
Planned maintenance: Generator maintenance
Battery, charger, fluid-level, leak and test-run checks follow the same routine whatever the make. What differs is how each controller records running hours, alarms and service reminders, which we read on every visit.
Controller menus and alarms: Control panel repairs
Each controller maker names its alarms and arranges its settings differently. We read the event log where the module keeps one, and check the start, cool-down and changeover timers in the module’s own menus before changing anything.
Voltage regulation: AVR repairs
Alternator makers use different AVRs and excitation systems: self-excited, auxiliary winding or a permanent magnet generator (PMG). A replacement AVR has to match the machine’s excitation and sensing.
Fuel and set design: Generator types
Whether a set burns diesel, petrol or gas, and whether it is a portable unit or an automatic standby system, shapes its faults and its servicing as much as the name on the canopy does.
Independent service
We Service & Repair All Generator Brands
Onsite Generator Repairs is an independent generator specialist. We repair, service and maintain every make of generator, engine, alternator and controller.
Manufacturer warranty claims go through the manufacturer’s own network. If your generator is still under warranty, check the warranty terms before arranging work by anyone else.
Brand names and trademarks belong to their respective owners. Onsite Generator Repairs is an independent service and repair company.
FAQ
Questions about generator brands
Are you independent of the generator manufacturers?
Yes. We are an independent generator specialist: We Service & Repair All Generator Brands. Brand names on this site describe the equipment we work on and do not indicate any connection with the companies that make it.
My generator’s brand is not listed. Can you still help?
Yes. Most sets are built from an engine, an alternator and a controller bought in from specialist makers, so an unfamiliar name on the canopy usually hides familiar parts. Send us photos of the plates and we can usually tell what the set is built from before we come out.
Do you work on Chinese, imported or unbranded generators?
Yes. We Service & Repair All Generator Brands, including imported sets sold under a retailer’s name or with no name at all. Larger ones may have a Chinese-built engine, such as a Weichai or Yuchai, with a SmartGen controller; small portables usually have an air-cooled single-cylinder engine. Their alternators work on the same principles as any other. Where a plate is missing, we identify the engine from its layout, its markings and the part numbers on the fitted filters, and match replacement filters by size and thread.
Can you get parts for older or imported generators?
Usually. We work from the engine and alternator data plates and serial numbers rather than the name on the canopy, because those identify the actual parts. Filters, belts and service items are widely available, with genuine or quality-equivalent options. Parts for older or less common engines can take longer, and where a part is no longer made we look at a compatible replacement, such as a current AVR or controller that suits the set. We give you the lead time when we quote.
How do I find out which engine, alternator and controller my generator has?
Start with the set nameplate, engine plate, alternator plate and controller front described in the four steps above. If a plate is missing, painted over or faded, the engine maker’s name is often cast into the rocker cover or block, and photos of the whole engine from both sides, plus the part numbers on its oil and fuel filters, usually let us identify it. Only open the canopy with the set stopped, the engine cool and the controller set to stop or off.
Does the brand change how often my generator needs a service?
The engine maker sets the interval, in running hours and by time, so it does vary between engines. How you use the set matters as much: a set that runs through several outages a day during load shedding reaches its hours interval long before one that only runs on test. See service intervals and oil care and generator servicing.
Is an older or discontinued generator worth repairing?
Often, yes. A sound engine and alternator frequently outlast the controller and canopy around them, and an obsolete control panel can usually be replaced with a current module. It stops making sense when the engine or alternator needs a major rebuild and parts are scarce. The repair or replace guide sets out how to weigh it up.
Tell us what is on the nameplate
Send photos of the nameplate, the engine plate and the controller screen with your enquiry. Free callouts and quotations. We arrive within 1–2 hours, usually within 1 hour.
