Ask most people in Lagos how they actually keep the lights on and the honest answer is rarely “NEPA.” It’s a generator — and a fuel budget that climbs every year. So the real comparison isn’t solar versus the grid. It’s solar versus the generator you already run. On that comparison, the maths has shifted decisively.
What generator power really costs in Lagos
A mid-to-large Lagos home or office typically spends between ₦200,000 and ₦800,000 every month on a blend of grid top-ups and generator fuel. Once you fold in fuel, servicing, engine oil, spare parts and the fuel an ageing genset simply wastes — older engines lose 20–30% as heat and idling — most households are effectively paying ₦350 to ₦600 for every kilowatt-hour the generator produces. That is several times the official grid tariff.
Diesel has more than doubled in recent years, and there is no structural reason to expect it to fall. Every price hike makes the generator more expensive to run — and a fixed-cost solar system relatively cheaper. That is the single trend that has changed the conversation for buyers across the city.
| Factor | Diesel / petrol generator | Solar + battery |
|---|---|---|
| Effective cost per kWh | ₦350–₦600 | A fraction of that — and fixed for the system's life |
| Monthly running cost | ₦200,000–₦800,000 in fuel + servicing | Near-zero after payback (minor servicing only) |
| Exposure to fuel prices | Rises with every hike | None — sunlight is free |
| Noise & fumes | Constant | Silent and clean |
| Maintenance | Frequent: oil, filters, repairs | Minimal, and remotely monitored |
| Lifespan | ~3–5 years before a major overhaul | Panels 25–30 yrs · lithium battery 10+ yrs · inverter 5–10 yrs |
| Value over time | Depreciates | Pays back, then keeps saving |
Where solar overtakes the generator
A typical Lagos home system — 7.2 kWp of panels, a 6 kVA hybrid inverter and a 15 kWh lithium battery — starts around ₦5.3 million fully installed. Against a generator habit of ₦200,000+ a month, most homes and offices recover that cost in two to three years. After that, the power is effectively free apart from minor servicing — for another decade or more.
If you’re spending more than ₦200,000 a month on power, you’re already paying for solar — you just don’t own it yet.
Looked at over ten years, a household or office that switches typically saves ₦25–40 million versus staying on diesel — and that gap widens with every fuel increase.
“But I can’t pay ₦5 million upfront”
This is the most common objection we hear, and it has answers. Lease-to-own takes 30–40% down with the balance spread over a few monthly payments — you own the system outright at the end. Uptime as a Service charges a flat monthly fee, roughly 30–40% of your current blended energy cost, with InfraSol owning and maintaining the system throughout. In practice, that means redirecting money you already burn on diesel into power you actually own.
Will I still need a generator?
A well-sized hybrid system runs the building on solar through the day, stores energy in the battery for the night, and falls back to NEPA automatically when needed — with no flicker and no manual change-over. For most homes the generator goes from daily workhorse to rare backup, and often comes out entirely. Larger commercial sites sometimes keep a generator for heavy machinery, but run it a small fraction as often.
The point isn’t that generators are useless — it’s that using one as your primary source of power is now, for most Lagos buyers, the most expensive option on the table.