Small Generator Prices in Nigeria 2026: Price List by Size
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Small generators in Nigeria: size it right, run it safely
The purchase price is the small number. What decides whether a generator is affordable is the fuel it drinks and whether you sized it correctly in the first place. Work out both here — then read the safety section, because generators kill people in Nigeria every year.
The short answer
- Size by starting watts, not running watts. Fridges, freezers, pumps and air conditioners draw several times their normal load for a second or two when the motor kicks in. Size for that spike or the generator stalls.
- Convert watts to kVA by dividing by about 0.8, then add headroom. A 2,000W load needs roughly 2.5 kVA before headroom.
- Fuel dominates the cost. Over a couple of years of daily use, petrol usually costs far more than the machine did.
- Oversizing wastes fuel, undersizing destroys appliances and the generator. Both are expensive mistakes.
- Never run a generator indoors, in a garage, or next to a window. Carbon monoxide is odourless and kills quickly — see the safety section below.
Nigeria runs on backup power, and small petrol generators are the most common answer for homes and small businesses. The buying decision usually gets made on sticker price, which is the wrong basis: a cheap generator that’s undersized will strain and fail, and one that’s oversized will burn fuel you didn’t need to buy, every hour it runs.
This guide gives you the two calculations that actually matter — what size you need and what it will cost to run — plus the safety information that’s missing from most articles on this subject.
Generator sizing & running cost calculator
Tick off what you need to power, then work out the fuel bill at today’s petrol price.
Two calculations, one tool
Nothing is stored or sent — it runs entirely in your browser.
How the numbers work, and what they don’t cover
Appliance wattages are typical figures for common household and small-business equipment. Yours will differ — check the rating plate on each appliance, which is always more accurate than any published table.
Starting watts apply to anything with an electric motor or compressor: fridges, freezers, pumps, air conditioners. The surge lasts a moment but the generator must be able to supply it. We assume the largest single motor starts while everything else is already running, which is the standard sizing approach.
kVA conversion uses a power factor of 0.8, the usual assumption for small generators. We then add 20% headroom, because running a generator continuously at its maximum rating shortens its life considerably.
Fuel figures come from you. We publish no petrol price or purchase price, because both move constantly in Nigeria. Consumption varies with load — a generator at half load uses far less than at full load.
Outputs are planning estimates. Have an electrician confirm anything you’re wiring into a building.
Generator safety: carbon monoxide kills.
Never run a generator indoors or in an enclosed space
Generator exhaust contains carbon monoxide — a gas with no colour, no smell and no taste. It causes deaths in Nigeria every year, frequently whole households at once, often while people sleep. Victims typically have no warning: the early symptoms are headache, dizziness and drowsiness, which are easily mistaken for ordinary tiredness.
- Outdoors only — never inside a room, kitchen, corridor, garage, balcony enclosure or under a carport that traps fumes.
- Well away from windows, doors and air vents. Exhaust drifts back inside through any opening; several metres of clear distance is the minimum.
- Never in a locked shed or generator house without proper through-ventilation designed for the purpose.
- Point the exhaust away from the building, and check where the fumes actually drift on a still night.
- If anyone feels headache, dizziness or nausea while a generator is running, get everyone into fresh air immediately and seek medical help.
- A carbon monoxide alarm is inexpensive insurance if a generator runs anywhere near where people sleep.
Never refuel a running or hot generator — petrol vapour ignites off hot exhaust. Let it cool first. Store fuel in proper containers away from the house, not in jerry cans indoors. And have an electrician install a changeover switch if you’re connecting to house wiring: back-feeding the grid endangers utility workers and is illegal.
Why this page no longer lists prices.
This guide used to publish naira price bands by capacity. We’ve removed them, because generators are overwhelmingly imported and dollar-priced, and the naira has moved substantially since those figures were written. A price list on a page like this is accurate for a few weeks and misleading thereafter.
What’s stable enough to be worth knowing:
- Price scales with capacity — a 5 kVA unit costs several times a 1 kVA one, so sizing correctly saves money twice over.
- Established brands cost more — and generally justify it through parts availability, service support and engine life.
- Features add cost — electric start, sound insulation, inverter technology and lower weight all carry a premium.
- Diesel costs more upfront, and generally makes sense only at larger sizes or heavy daily running hours.
For a current figure on a specific size and brand, ask us for a quote — we’ll give you today’s price rather than last year’s.
What actually matters when buying.
Right size, not biggest
An oversized generator burns fuel you don’t need. An undersized one strains, overheats and damages both itself and your appliances.
Parts and service
The most important question nobody asks: can you get spares locally? A cheap generator with no parts supply is disposable.
Fuel consumption
Compare litres per hour at realistic load, not just the tank size. Over a year this outweighs any difference in purchase price.
Inverter models
More expensive, but they vary engine speed with load — quieter, more fuel efficient, and cleaner power for computers and TVs.
Warranty and genuine goods
Buy from authorised dealers. Counterfeit and grey-import units are common, and warranty means nothing without a service network.
Noise
You and your neighbours live with it nightly. Sound-insulated models cost more and are worth it in dense residential areas.
Generator or solar?
Worth asking honestly, because the answer has shifted. A generator is cheap to buy and expensive to run; a solar and battery system is the reverse. Which wins depends on how many hours you actually need power.
| Petrol generator | Solar & battery | |
|---|---|---|
| Upfront cost | Low | High |
| Running cost | Fuel every day it runs | Essentially none |
| Maintenance | Regular servicing, oil, filters, parts | Minimal; battery replacement eventually |
| Noise | Constant while running | Silent |
| Fumes | Carbon monoxide risk | None |
| Heavy loads | Handles AC and pumps if sized right | Needs a larger, costlier system |
| Cloudy days / night | Runs whenever fuelled | Depends on battery capacity |
| Best for | Occasional outages, heavy intermittent loads | Daily sustained use, lighting and electronics |
Many Nigerian households end up with both — solar carrying lights, fans, phones and electronics daily, with a generator held back for heavy loads and long outages. If you want to price that properly, see our solar installation page.
Quick answers
What size generator do I need for my house?
How much does a small generator cost in Nigeria?
How much fuel does a small generator use?
Can I run a generator inside my house or garage?
What is the difference between kVA and kW?
Is a generator or solar cheaper in the long run?
Important: This page is general information for planning purposes. Appliance wattages are typical values only — always check the rating plate on your own equipment, which takes precedence. Calculator outputs are estimates generated from figures you enter and are not a specification, quotation or electrical design; have a qualified electrician verify any installation, and never connect a generator to building wiring without a properly installed changeover switch. Safety guidance here is a summary and not a substitute for the manufacturer’s instructions, which you should read and follow. No prices are published on this page because generator and fuel prices in Nigeria change frequently with exchange rates and market conditions. Brand names are the trademarks of their respective owners and are used for identification only.
Know the size you need? We’ll price it.
Wigmore sources and supplies equipment for homes and businesses across Nigeria — tell us the capacity and we’ll come back with a current price.
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