For many Nigerian homes and businesses, eliminating the generator entirely is not necessary. The bigger win is reducing how many hours it runs.
How a hybrid system prioritises sources
A hybrid inverter can be configured to use energy in a set order — typically:
- Solar first, for loads and battery charging
- Battery when solar is insufficient
- Grid when available
- Generator only when the battery reaches a set minimum level
Automatic generator start
Many hybrid inverters can start and stop a compatible generator automatically. When the generator runs, it operates at a healthy load — charging the batteries quickly — and then shuts down. This is far more fuel-efficient than running a generator lightly loaded for hours.
Load management
Separating essential circuits (lights, fridges, sockets, IT) from heavy loads (water heaters, cookers, some ACs) lets the solar system carry what matters most while heavy loads wait for grid supply.
What to expect
Runtime reduction depends on system size, weather, loads and grid availability. A careful design states its assumptions — be wary of claims of “no more generator, ever”.
Use the generator vs solar calculator to model your own figures.