A 10kVA diesel generator looks cheaper than solar on day one. Run the numbers over five years and the picture flips dramatically. We do the full math with 2026 fuel prices.
"Solar is too expensive." We hear it every week — usually from someone spending ₦150,000 a month on petrol or diesel. So let's settle the argument with actual numbers, using realistic 2026 prices.
The Contenders
- Option A: 10kVA diesel generator — ₦2,800,000 purchase price.
- Option B: 5kVA hybrid solar system with 10kWh lithium storage — ₦5,500,000 installed.
Yes, solar costs nearly twice as much upfront. Now watch what happens after the purchase.
Running Costs: Where Generators Bleed You Dry
A 10kVA diesel generator under moderate load burns roughly 1.5–2 litres per hour. Run it just 8 hours a day:
- Fuel: 12 litres/day × ₦1,100/litre = ₦13,200 per day
- Monthly fuel: ≈ ₦396,000
- Servicing (oil, filters, plugs) every 250 hours: ≈ ₦40,000/month averaged
- Yearly running cost: ₦5,200,000+
The solar system's running cost? A panel wash a few times a year and a periodic checkup — under ₦100,000 per year, and nothing at all if you're on a maintenance plan.
The 5-Year Scorecard
- Generator: ₦2.8M purchase + ₦26M running ≈ ₦28,800,000 — plus noise, fumes, and at least one engine overhaul.
- Solar: ₦5.5M installed + ₦0.5M maintenance ≈ ₦6,000,000 — silent, clean, and still under warranty.
Over five years the generator costs nearly five times more. Even running the generator only 4 hours daily, solar still wins by more than ₦7 million.
The Costs Nobody Puts in the Spreadsheet
- Health: generator fumes are linked to respiratory illness — a silent killer in dense estates.
- Noise: your family sleeps through the night on solar. No 6am pull-start.
- Security: no fuel storage, no fuel theft, no midnight trips to the filling station during scarcity.
- Property value: homes with installed solar increasingly command premium rents in Abuja.
The Smart Play: Hybrid
Many of our customers keep their existing generator as a rainy-season backup and let solar carry 90%+ of the load. The generator that used to run 8 hours a day now runs 8 hours a month — and the savings fund the solar system in under two years.
Want the exact numbers for your own home or business? Request a free energy audit and we'll model your payback period line by line.
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