Battery-only lighting unit
A tower or mast with a battery and no engine at all, charged from a mains point or a shared generator between shifts. Completely silent and emission-free in use, with no engine to service.
Features
- With no engine there is no fuel, no exhaust and no engine servicing, which removes most of a tower's running cost and most of its failure modes.
- The unit has to be charged somewhere, so the job needs either a mains point in the compound or a charging rotation with spare units.
- Silent and emission-free operation makes these the only option inside buildings, tunnels and enclosed structures.
- Charging time, not run time, becomes the constraint on a two-shift operation.
- Cold ambient reduces usable capacity, so winter run times need to be confirmed rather than assumed from a summer figure.
Specifications
| Figure | Typical range | Unit | Why it matters |
|---|---|---|---|
| Battery capacity | 3 - 20 | kWh | Sets run time per charge. |
| Run time per charge | 10 - 40 | h | The operational limit of the unit. |
| Recharge time from empty | 6 - 12 | h | Decides whether one unit covers two shifts. |
| Charging supply | 230 / 1~ | V | Whether the compound supply is adequate. |
| Total luminous flux | 40 000 - 160 000 | lm | The output comparison figure. |