A generator wins on day one. It's cheaper to buy, it's available immediately, and it doesn't require any planning. That's exactly why it's the default choice for most Nigerian homes and businesses — and it's also exactly why so few people ever step back and compare the two paths over a longer stretch of time.
When you do, the picture changes completely. Here's what five years actually looks like for each option.
Year by Year: Generator Ownership
Assume a mid-sized household spending a modest ₦150,000 a month on fuel and upkeep — on the low end of what many families actually spend.
| Year | Running Cost | Cumulative Spend |
|---|---|---|
| Year 1 | ₦1,800,000 | ₦1,800,000 |
| Year 2 | ₦1,800,000 + repairs | ~₦3,800,000 |
| Year 3 | ₦1,800,000 + major service | ~₦6,000,000 |
| Year 4 | ₦1,800,000 + parts replacement | ~₦8,300,000 |
| Year 5 | ₦1,800,000 + generator nearing replacement | ~₦10,600,000+ |
And at the end of five years, you own an aging generator that's probably due for replacement — the spending doesn't stop, it just continues into year six.
Year by Year: Solar Ownership
Now compare that to a solar system sized for the same household — say, a Standard package in the ₦2,500,000 range, similar to what's on our products page.
| Year | Running Cost | Cumulative Spend |
|---|---|---|
| Year 1 | ₦2,500,000 (installation) | ₦2,500,000 |
| Year 2 | Near-zero | ~₦2,550,000 |
| Year 3 | Near-zero | ~₦2,600,000 |
| Year 4 | Near-zero | ~₦2,650,000 |
| Year 5 | Near-zero | ~₦2,700,000 |
By year two, solar has already become the cheaper option. By year five, the household has saved roughly ₦7.9 million compared to running a generator — and the solar system still has 15–20 years of useful life left, with the batteries and panels covered by warranty for most of that time.
Why the Numbers Flip So Fast
The reason solar overtakes a generator so quickly comes down to one structural difference:
- A generator's cost is almost entirely recurring — fuel, servicing, and parts never stop.
- Solar's cost is almost entirely upfront — once it's installed, sunlight is free.
Every additional year you run a generator adds a nearly identical cost to the year before. Every additional year you run solar adds almost nothing. The lines cross earlier than most people expect — often within 18–24 months for a typical residential setup.
What This Looks Like for Larger Systems
The same math scales up for businesses. One of our commercial customers in Ikeja, Lagos was spending over ₦1.5 million a month before switching to a 50kW hybrid system — a 65% reduction in energy costs, with the system paying for itself well within the 5-year window this article is built around. See more examples in our Portfolio.
Run Your Own 5-Year Comparison
Every home and business is different, so the exact crossover point depends on your current generator spend and the system size you actually need. Our Power Audit calculator takes your real appliances and usage and gives you a personalized cost estimate and payback period in a couple of minutes.
