Osun State
Solar in Irepodun: sunlight, tariffs and what a system costs
A rooftop in Irepodun gets about 4.4 peak sun hours a day, so every kilowatt of panels makes roughly 1,342 kWh a year. A 5 kW home system produces about 18 kWh on an average day, against roughly 18 kWh of daily demand.
Every figure below is recalculated for the audience you pick.
Peak sun hours
4.4 h/day
Daily average across the year
Yield per kW
1,342 kWh/yr
Delivered output, after 17% system losses
5 kW system output
18 kWh/day
6,708 kWh a year
Grid tariff (modelled)
₦209.50/kWh
IBEDC Band A, cost-reflective
What it costs and how you pay
A five-year facility on this system costs about ₦122,535 a month, against ₦92,779 a month of savings — a gap of ₦29,755 a month to top up until the fuel bill falls away.
Pay outright
₦4.2m
Lowest lifetime cost, fastest return
5-year facility
₦122,535/mo
Indicative at 25% a year
Monthly saving
₦92,779
Year one, fuel and tariff combined
Monthly top-up
₦29,755/mo
What you add until the fuel bill falls away
Spent on power today
₦26,098/mo
Typical building in this area
What this area buys
Full home system
Affordability index 1.43 against the national average
Lease and pay-as-you-go structures exist for businesses with a steady load — those are priced per site, not per package.
What a system costs in Irepodun
Installed price estimates using today's median Nigerian hardware rates plus installation, and savings valued at your local tariff and what a generator costs to run. Estimates, not quotes.
Essentials
Lights, fans, TV, phones and a small fridge
₦2.9m
3 kW solar · 5 kWh battery · 3.5 kVA inverter
- Generates
- 335 kWh/month
- Avoided spend
- ₦137,382/month
- Pays back in
- 1.7 years
- Fuel avoided
- 800 L/yr
Family home
Full home minus air conditioning, with overnight backup
₦5.1m
5 kW solar · 10 kWh battery · 5 kVA inverter
- Generates
- 559 kWh/month
- Avoided spend
- ₦242,438/month
- Pays back in
- 1.8 years
- Fuel avoided
- 1,411 L/yr
Whole home
Air conditioning, boreholes and a home office
₦10.2m
10 kW solar · 20 kWh battery · 10 kVA inverter
- Generates
- 1,118 kWh/month
- Avoided spend
- ₦495,651/month
- Pays back in
- 1.7 years
- Fuel avoided
- 2,885 L/yr
What this system returns in Irepodun
A four-bedroom home running fans, fridge, TV, pumps and light air conditioning. 5 kW solar, 10 kWh battery, 4.8 kW inverter — installed at about ₦4.2m. Solar costs ₦176 a unit over its life, and 81% of demand is met without the grid.
Year-one savings
₦1.1m
₦92,779 a month off the bill
Payback
5.0 yrs
Simple payback on installed cost
Return (IRR)
22%
Over a 20-year life
20-year savings
₦16.3m
Net present value ₦2.3m
What it returns here
No two buildings in Irepodun save the same amount. Across every viable roof modelled here, the middle half lands between 4.1 and 6.4 years to pay back, with returns of 17%–25% a year. If you already run a generator, solar starts by replacing the most expensive units you buy, so it pays back fastest; a grid-only building displaces cheaper units and takes longer.
Payback
4.1–6.4 yrs
Median 4.4 years
Return a year
17%–25%
Median 25% IRR
With a generator today
4.4 yrs
Fuel displaced first, then grid units
Grid-only building
4.4 yrs
Nothing to displace but tariff units
This page's system
5.0 yrs
From the simulated run above
Year-one saving
₦303,681–₦469,325
Implied by the payback spread on a typical system
Pay back inside 5 years
58%
7% inside three years
Energy independence
38%
Share of the year covered by solar and storage
Demand unlocked
1.1 kWh/day
393 kWh a year, per building
What that runs
24 fan-hours
Or a fridge running unbroken, plus lights all evening
Modelled solar unit
₦168/kWh
Across every viable roof here
- Beyond the money, the change people notice is that the things they switch off stay on — about 1.1 kWh a day of currently suppressed demand comes back.
Modelled at today's fuel and tariff, against what each building spends on power now. Both have moved upward, which shortens payback.
Environmental benefit in Irepodun
Diesel avoided
1,411 L/yr
About ₦2.5m of fuel
CO₂ avoided
4,663 kg/yr
Grid factor 0.5 kg per kWh
Generator hours cut
565 hrs/yr
At a typical 2.5 L an hour
Clean energy
6,038 kWh/yr
Used on site, not exported
Nearby areas in Osun
Sizing the market rather than a single site? See the rooftop market data for Osun State.
Generation figures for Irepodun use the Osun State average, which is within a few percent across the state.