Rivers State
Solar in Andoni: sunlight, tariffs and what a system costs
A rooftop in Andoni gets about 4.6 peak sun hours a day, so every kilowatt of panels makes roughly 1,406 kWh a year. A 5 kW home system produces about 19 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
4.6 h/day
Daily average across the year
Yield per kW
1,406 kWh/yr
Delivered output, after 17% system losses
5 kW system output
19 kWh/day
7,030 kWh a year
Grid tariff (modelled)
₦209.50/kWh
PEDC 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 ₦93,526 a month of savings — a gap of ₦29,008 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
₦93,526
Year one, fuel and tariff combined
Monthly top-up
₦29,008/mo
What you add until the fuel bill falls away
Spent on power today
₦918,307/mo
Typical building in this area
What this area buys
Full home system
Affordability index 3.02 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 Andoni
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
- 351 kWh/month
- Avoided spend
- ₦143,943/month
- Pays back in
- 1.7 years
- Fuel avoided
- 838 L/yr
Family home
Full home minus air conditioning, with overnight backup
₦5.1m
5 kW solar · 10 kWh battery · 5 kVA inverter
- Generates
- 586 kWh/month
- Avoided spend
- ₦254,016/month
- Pays back in
- 1.7 years
- Fuel avoided
- 1,479 L/yr
Whole home
Air conditioning, boreholes and a home office
₦10.2m
10 kW solar · 20 kWh battery · 10 kVA inverter
- Generates
- 1,171 kWh/month
- Avoided spend
- ₦519,322/month
- Pays back in
- 1.6 years
- Fuel avoided
- 3,023 L/yr
What this system returns in Andoni
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 ₦174 a unit over its life, and 82% of demand is met without the grid.
Year-one savings
₦1.1m
₦93,526 a month off the bill
Payback
4.0 yrs
Simple payback on installed cost
Return (IRR)
22%
Over a 20-year life
20-year savings
₦16.5m
Net present value ₦2.4m
What it returns here
No two buildings in Andoni save the same amount. Across every viable roof modelled here, the middle half lands between 1.6 and 4.6 years to pay back, with returns of 25%–67% 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
1.6–4.6 yrs
Median 1.9 years
Return a year
25%–67%
Median 55% IRR
With a generator today
1.9 yrs
Fuel displaced first, then grid units
Grid-only building
1.9 yrs
Nothing to displace but tariff units
This page's system
4.0 yrs
From the simulated run above
Year-one saving
₦2.6m–₦7.4m
Implied by the payback spread on a typical system
Pay back inside 5 years
83%
64% inside three years
Energy independence
87%
Share of the year covered by solar and storage
Demand unlocked
3.6 kWh/day
1,309 kWh a year, per building
What that runs
80 fan-hours
Or a fridge running unbroken, plus lights all evening
Modelled solar unit
₦175/kWh
Across every viable roof here
- Beyond the money, the change people notice is that the things they switch off stay on — about 3.6 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 Andoni
Diesel avoided
1,479 L/yr
About ₦2.7m of fuel
CO₂ avoided
4,885 kg/yr
Grid factor 0.5 kg per kWh
Generator hours cut
591 hrs/yr
At a typical 2.5 L an hour
Clean energy
6,326 kWh/yr
Used on site, not exported
Nearby areas in Rivers
Sizing the market rather than a single site? See the rooftop market data for Rivers State.