Nigeria
Solar in Osun State: sunlight, tariffs and what a system costs
A rooftop in Osun State 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 a system costs in Osun State
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
- ₦78,001/month
- Pays back in
- 3.1 years
- Fuel avoided
- 188 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
- ₦137,650/month
- Pays back in
- 3.1 years
- Fuel avoided
- 332 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
- ₦281,417/month
- Pays back in
- 3.0 years
- Fuel avoided
- 679 L/yr
What this system returns in Osun State
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
₦92,836 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
Environmental benefit in Osun State
Diesel avoided
332 L/yr
About ₦597,725 of fuel
CO₂ avoided
3,406 kg/yr
Grid factor 0.5 kg per kWh
Generator hours cut
133 hrs/yr
At a typical 2.5 L an hour
Clean energy
6,038 kWh/yr
Used on site, not exported
Local government areas in Osun
Sizing the market rather than a single site? See the rooftop market data for Osun State.