WhisperPower Equipment
AGM Battery 12 V - 55 Ah
12 V 55 Ah AGM (VRLA) maintenance-free battery for marine, mobile and solar systems, inverters, pumps, winches and engine starting.
Description
The WhisperPower AGM Battery 12 V – 55 Ah (part number 40290060) is a maintenance-free VRLA (valve-regulated lead-acid) battery that needs little ventilation and can be installed in any orientation. It suits marine, mobile and solar energy systems, medium-sized inverters, DC installations, pumps and winches, and can also be used as a starter battery.
Technical data
- Nominal: 12 V, 55 Ah (C10); 6 cells
- Capacity: 58.6 Ah (20 h), 55.0 Ah (10 h), 44.5 Ah (5 h); 92 min at 25 A
- Float charge: 13.60–13.80 VDC; absorption: 14.25–14.60 VDC at 25 °C
- Max recommended charge current: 40–50% of capacity
- Inrush current (5 s, 25 °C): 550 A
- Cycle life at 80% discharge: 400
- Self-discharge: <3% per month at 25 °C; internal resistance approx. 6.0 mΩ
- Dimensions: 229 × 138 × 210 mm; weight 18.0 kg; M6 stainless terminals
Specifications
| 40290060 | AGM Battery 12 V - 55 Ah |
|---|---|
| Length x width x height | 229 × 138 × 210 mm (9" x 5.4" x 8.3" inch) |
| Weight ± 10% | 18.0 kg / 39.7 lb. |
| Nominal capacity | 55 Ah |
| C10* or C20 | C10 |
| Nominal voltage | 12,0 VDC |
| Terminal type | M6 rvs |
| Number of cells | 6 |
| Constant charge voltage (IU, float) | 13.60 .. 13.80 VDC at 25oC |
| Cyclic charge voltage (IUU, absorption) | 14.25 .. 14.60 VDC at 25oC |
| Maximum recommended charge current (higher possible) | 40 to 50% of nominal capacity |
| Temperature ratio | -4mv/cel/°C |
| Discharge voltage | 1.75 VDC @ (A) ≤ 0.2°C • 1.70 VDC @ 0.2°C (A) ≤ 1.0°C |
| Full discharge (100% DOD) | 1.65 VDC @ (A) ≥ 1.0°C |
| Nominal 25°C | UP TO 1.75 VDC/CEL |
| 20 hours discharge | 58.6Ah |
| 10 hours discharge | 55.0 Ah |
| 5 hours discharge | 44.5 Ah |
| Peukeurt Coefficient | 1.21<P<1.24 |
| Usage at 25 A discharge | 92 min |
| Self discharge | Less than 3% per month at 25°C |
| Storage time | AGM batteries can be stored for up to 6 months at 25°C, recommended to charge before use |
| Inrush current at 25°C (5s) | 550 A |
| Cyclic life at 80% discharge | 400 |
| Internal resistance (approx.) | 6,0m Ω |
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