A generator is one of the bigger purchases most Nigerian households and small businesses make, and getting it wrong is expensive twice over — once at purchase, and again in fuel and repairs for years afterward.
Before you hand over any money, here's what actually separates a good buy from a costly mistake.
✓ Do
- Calculate your actual load in watts before shopping, including the startup surge of fridges and AC units.
- Buy a little above your calculated need — running a generator at 50–80% load is more efficient and lasts longer.
- Ask specifically about after-sales support and where spare parts are sold locally.
- Check the fuel tank capacity against how long you actually need it to run unattended.
- Test-start the unit in the shop before you pay, if at all possible.
✕ Don't
- Don't buy purely on price — the cheapest unit is often the most expensive over 2–3 years in repairs.
- Don't undersize it to save money; overloading a generator shortens its life dramatically.
- Don't buy without checking if a local technician stocks parts for that brand.
- Don't ignore noise level if you live close to neighbours — soundproof casing costs more but avoids real friction.
- Don't skip asking for a warranty in writing, however informal the seller seems.
Petrol, diesel, or inverter — which one fits?
Petrol generators
Best for smaller, occasional loads — a few rooms, a router, some lights and a fridge. Cheaper upfront, noisier, and petrol is generally pricier per hour of runtime than diesel.
Diesel generators
Better suited to businesses and larger homes running heavier, longer loads. More fuel-efficient over time, longer-lasting engines, but a higher upfront cost.
Inverter generators
Quieter and more fuel-efficient for smaller loads, with cleaner power output that's safer for sensitive electronics. A strong option if noise or laptop/TV safety is a priority.
Sizing it correctly
Add up the running wattage of everything you'll power at once, then add the highest single startup surge (usually a fridge or AC compressor) on top. A generator sized to your everyday load, with headroom for the occasional heavier day, beats one bought purely on budget.
Key takeaways
- Size the generator to your real load plus the biggest startup surge.
- Match fuel type to how often and how long you'll actually run it.
- Parts availability matters as much as brand name.
- A proper change-over switch and earthing are non-negotiable, not optional extras.
