At Premium Electricians Zimbabwe, we install and integrate generator and changeover switch systems — both manual and automatic (ATS) — for properties across Zimbabwe, including Harare, Bulawayo, Mutare, and other major towns.
Our goal is to keep your home, business, or workshop powered safely through load-shedding and power cuts.
When the grid is off for hours and batteries are running low, a reliable generator with a safe changeover is the simplest way to keep business moving and the house comfortable.
We install and integrate generators for homes, shops, offices, clinics, and workshops throughout Zimbabwe — so you can switch power without stress, without back-feeding ZETDC, and without frying sensitive equipment when power returns.
Our focus is practical: the right generator size, clean wiring, a compliant changeover or ATS, proper earthing and surge protection, and a tidy handover that anyone in the family or team can use confidently.
What a changeover (or ATS) actually does
A changeover switch is a mechanical or electrical selector that feeds your DB board from either the utility (ZETDC) or the generator—never both.
A manual changeover is a lever you move yourself; an ATS (Automatic Transfer Switch) senses a power cut, starts the generator, transfers the load automatically, then switches back to the grid and stops the generator when power returns.
Both options prevent dangerous back-feed to the street and simplify day-to-day use. We’ll help you choose based on site, budget and who will operate it.
Petrol vs diesel, single-phase vs three-phase, AVR and size
For small homes and light shops, petrol generators can be fine: affordable to buy, quieter at low kVA, straightforward to service.
For longer runtimes or heavier loads, diesel wins: robust, more fuel-efficient, made for continuous use.
If your premises run three-phase equipment or a large DB with multiple phase loads, we’ll plan a three-phase generator and balance phases properly during commissioning.
We also prioritise units with AVR (automatic voltage regulation) so lights don’t flicker and electronics stay happier, and we confirm 50 Hz frequency stability under load.
Sizing isn’t guesswork. We list the circuits you want alive during an outage (lighting, fridges/freezers, POS/IT, pumps, fans, security/NVR, gate/garage, maybe air-con), add starting surges for compressors and pumps, and add a cushion so the generator doesn’t grunt every time the fridge kicks in.
A small home might be comfortable around 5–8 kVA; a busier home or shop might sit around 8–12 kVA; workshops and multi-fridge businesses can step into the teens or higher. We’ll look at your actual appliances and distribution board so the recommendation fits real life.
Manual changeover or ATS: which is right for you?
If you’re often on site and happy to walk to the switch, manual changeover is cost-effective and very reliable.
You’ll start the generator, flip from GRID → GEN, and keep an eye on fuel. For convenience and unattended sites, ATS is brilliant: the ATS senses the outage, starts the generator, transfers automatically, then returns to grid later and cools the generator down before shutting it off.
ATS also reduces mistakes under pressure and is ideal for clinics, fridges/freezers, servers and security equipment that mustn’t switch off for long.
The installation approach (what we actually do)
We start at the DB board. The supply side must be clean, labelled and easy to isolate.
We mount the changeover or ATS close to the board, route cabling in trunking, and install proper isolators on both grid and generator sides.
We check earthing and bonding and add a dedicated earth spike if needed. On the generator, we set a safe neutral-earth bonding strategy that doesn’t fight with your RCDs/RCBOs, and we confirm the frame is earthed.
Where sensitive electronics are present, we add surge protection devices (SPDs Type 1/2/3) to protect TVs, routers, NVRs and point-of-sale from power-return spikes.
If the site is three-phase, we balance loads, verify rotation (for motors), and label circuits clearly so staff know what lives on the generator and what stays off.
Placement matters. Generators need ventilation, safe exhaust routing, and clearance from windows and doors.
We’ll help you choose a spot that minimises fumes and noise, keeps rain off controls, and allows safe refuelling.
For businesses, we can add a mains fail indicator near reception or security, and simple SOPs so staff follow the same steps every time.
Using a generator with an inverter/UPS or solar
If you already have an inverter system, the generator becomes your “long-cut” option: batteries cover short load-shedding; the generator takes over during extended outages or heavy loads.
We set a clean changeover/ATS so you can choose when to bring the generator online, and we configure the inverter to charge batteries efficiently from the generator without tripping breakers or overloading.
If there’s solar, we confirm DC isolators, charge priorities and protections so all three sources play nicely.
Fuel, noise and running costs
Petrol units are cheaper to buy but cost more per kWh to run; diesel is the opposite.
We’ll give you a simple rules-of-thumb estimate for fuel burn at your typical load so you’re not surprised later.
Noise depends on kVA, enclosure quality and placement; we’ll recommend realistic sound levels and practical steps—rubber feet, proper base, exhaust direction—to keep the peace with neighbours and staff.
Maintenance and reliability
Generators like regular exercise. We encourage a monthly 10–15 minute test run, under load if possible, and a straightforward service routine: oil and filter at the maker’s interval, air filter if it’s dusty, spark plug checks on petrol units, and fuel quality management (especially on diesel—keep water and dirt out).
We can set reminders and show you the quick visual checks that catch problems early.
Safety and compliance
Back-feeding a street line is dangerous and illegal. A compliant manual changeover or ATS, correct cable sizes, sound terminations, earth testing and proper labelling keep everyone safe.
We test voltage, frequency and RCD/RCBO behaviour under generator power, verify earthing, and confirm the generator cannot energise the utility side.
If your scope requires it, we can arrange a Compliance Certificate (CoC) after testing.
What to expect on installation day
We’ll confirm the circuits you want on generator supply, isolate safely, and fit the changeover or ATS. The generator is positioned, earthed and connected; then we run live tests—manual transfer or simulated mains fail for ATS—checking voltage, frequency and load behaviour.
We label the board and give you a simple handover: how to start/stop, how to transfer, what not to plug in, and what to do when the grid returns.
Prepaid meters and ZETDC realities
Your prepaid meter remains on the utility side; the changeover prevents any back-feed into ZETDC lines.
If the meter misbehaves after installation, we’ll test your side first, then guide next steps with the utility. Clear isolation and good labelling make inspections faster and friendlier.
Areas we cover in Zimbabwe
Harare, Bulawayo, Chitungwiza, Mutare, Gweru, Masvingo, Kwekwe, Kadoma, Chinhoyi, Marondera, Bindura, Norton, Ruwa, Nyanga, Victoria Falls—and other towns.
FAQs
How big should my generator be?
We add up your essential loads and include starting surges for fridges and pumps, then add headroom so the voltage stays steady. Small homes might be 5–8 kVA; busier homes/shops 8–12 kVA; workshops can be higher. We’ll size it from your actual appliances.
Manual changeover or ATS—what’s better?
Manual is cheaper and very reliable if you’re on site. ATS is best for convenience, clinics, cold storage and security—no one has to rush to a switch when the power drops.
Will a generator damage my electronics?
Not if it’s installed correctly. We use AVR-equipped units where possible, set proper earthing, and add SPDs at the DB to soak up surges, especially when power returns.
Can I run air-cons, stoves or geysers on the generator?
You can if the generator is sized for it, but fuel use and noise jump fast. Most clients keep big heat loads off the generator and prioritise lighting, fridges, POS/IT and security.
Does this work with my existing inverter?
Yes. We integrate a changeover/ATS so the generator can charge batteries and support loads without tripping the inverter or back-feeding the grid.
Do you provide ongoing service?
We can set a service plan for oil, filters and checks, and show you a simple monthly test routine so the unit starts first time when you need it.