A lot of homes in Port Harcourt, Warri and Ughelli start with an "inverter": an inverter plus two or four batteries, charged from NEPA when light comes. It is cheaper than solar, so it looks like the sensible first step. Sometimes it is. Often it is not.
How an inverter-only setup works
- Grid power comes on and charges the batteries.
- Grid goes off and the inverter runs your home from the batteries.
- The batteries drain until grid comes back, and the cycle repeats.
The whole system depends on step 1. If grid supply is short or irregular, the batteries never refill.
When inverter-only makes sense
- You get 8 or more hours of regular grid supply a day
- You only need power for short outages, not whole nights
- Your loads are light: lights, fans, TV, Wi-Fi
When it does not
In much of Rivers, Delta and Bayelsa, supply comes in short bursts at odd hours. Then:
- Batteries start each night half-charged
- Lead-acid batteries sulphate and die in months, not years
- Many people end up running the generator to charge the batteries, which defeats the purpose
| Inverter only | Full solar (hybrid) | |
|---|---|---|
| Charges from | Grid (or generator) | Sun and grid / generator |
| Works with few grid hours | Poorly | Yes |
| Daily running cost | Grid bill + fuel when grid fails | Close to zero |
| Typical battery life (lead-acid) | Often under 1 year with poor grid | n/a — we fit lithium |
| Upfront cost | Lower | Higher |
Upgrading from inverter-only to solar
You may not have to throw everything away. During a site visit we check:
- Does the inverter have a solar charge controller? Hybrid inverters do; basic ones do not.
- Battery voltage. 12V systems are small and inefficient; 24V or 48V are better for adding panels.
- Maximum solar input. This decides how many panels it can take. See how many panels a 5kVA inverter needs.
- Battery condition. Old gel or tubular batteries are usually not worth keeping. A lithium upgrade often makes the biggest difference.
Sometimes the best answer is to keep the inverter and add panels and a lithium battery. Sometimes the inverter is modified sine wave or too small, and replacing it is cheaper in the long run. We will tell you honestly.
The bottom line
If your area gets long, steady grid supply, an inverter can bridge short outages. If it does not, and that is most of the Niger Delta, the panels are what make the system work. Compare the long-term cost in generator vs solar, or see full system prices on the pricing page. We do inverter-to-solar upgrades in Ughelli, Warri, Port Harcourt, Yenagoa and beyond.
