Solar costs the same to buy anywhere in Nigeria, but not to size: Port Harcourt gets about 4 peak sun hours a day on the annual average, so the panel count for the same household differs from other states. The table below sizes three typical Rivers homes with the same engine as our inverter size calculator, with a lithium battery bank for 10 hours of backup and 2026 component price estimates.
| Household | Inverter | Battery | Panels | Installed |
|---|---|---|---|---|
| Essentials | 1.5kVA · 24V | 1 × 5kWh | 2 × 550W | ₦2.65M–₦2.77M |
| Family home | 1.5kVA · 24V | 1 × 5kWh | 4 × 550W | ₦3.02M–₦3.16M |
| AC household | 3.5kVA · 48V | 2 × 5kWh | 10 × 550W | ₦6.52M–₦6.82M |
Essentials means lights, fans, TV, phones and internet; the family home adds a fridge and laptops; the AC household adds a 1.5HP inverter AC at night. Installed prices include components plus 10 to 15% installation and move with the exchange rate.
A Rivers family running essentials plus a fridge and laptops draws a peak of about 860W when everything is on together, which needs a 1.5kVA inverter after 30% surge headroom and the 0.8 power factor. Daily energy is about 6.1 kWh, so 10 hours of backup takes 1 lithium unit of 5kWh at 80% usable depth, and replacing that energy at 4 sun hours and 75% efficiency takes 4 panels of 550W. All in: about ₦3.02M to ₦3.16M installed.
Your house is not the average house. Build your actual appliance list in the inverter size calculator and use its installer quote form to get Rivers installers quoting the same sized system.
Estimate only. Sized at 4 annual-average peak sun hours for Port Harcourt and 75% system efficiency, with rough 2026 component prices that move with the exchange rate. Rainy-season output runs below the annual average, so treat backup hours conservatively. Confirm with installer quotes before buying.