Hybrid battery and generator power unit
A battery pack with an inverter and a small generating set that starts only to recharge it. Chosen where the base load is tiny, the peak is occasional, and idling a diesel set all night is not acceptable.
Features
- The battery carries the base load silently and the engine runs only in charging windows, which typically cuts fuel use by 60 to 80 % against a continuously running set.
- Because the engine only ever runs at high load while charging, it avoids the light-load glazing that kills conventionally run standby sets.
- Engine start is triggered by battery state of charge, so the controller's set points decide fuel use more than the engine specification does.
- Peak output is limited by the inverter, not the battery, and a motor start has to sit inside the inverter's short-term rating.
- Cold ambient reduces usable battery capacity, so run-time claims need a stated temperature beside them.
- Engine hours and battery cycles are separate counters and diverge quickly — a low-hours hybrid can still have a tired pack.
Specifications
| Figure | Typical range | Unit | Why it matters |
|---|---|---|---|
| Continuous inverter output | 10 - 60 | kVA | The real limit on what can run at once. |
| Battery capacity | 20 - 120 | kWh | Sets how long the engine can stay off. |
| Silent run time at 25 % load | 8 - 24 | h | The figure a night consent depends on. |
| Engine run hours per 24 h | 2 - 5 | h | Drives both fuel cost and service interval. |