Phoenix 5.12kWh Lithium-ion Battery 51.2V (RLR-5.1-X1)
Rs 220,000
Rs 47,218 per usable kWh
Price updated: 21 September 2026
Full specifications
| Brand | Phoenix |
| Model | RLR-5.1-X1 |
| Electrical Specifications | |
| Battery type | Lithium |
| Battery chemistry | LiFePO4 |
| Capacity | 100 Ah |
| Cycle life | 6000 |
| Usable capacity | 91% |
| Nominal energy | 5.12 kWh |
| Nominal voltage | 51.2 V |
| Operating voltage range | 44.8-57.6 V |
| Max. parallel batteries | 8 |
| Continuous charging current | 50 A |
| Peak charging current | 100 A (max) |
| Continuous discharging current | 50 A |
| Peak discharging current | 100 A (max) |
| General Specifications | |
| Temperature range | Charge 0°C ~ +55°C / Discharge -20°C ~ +60°C |
| Communication port | RS485 / CAN |
| Dimensions (W×H×D) | 442 × 468 × 135 mm |
| Weight | 42 kg |
| Mounting type | Rack |
Note: The Rack series - a 135 mm-high 19-inch module with plug-and-play terminals, 11 kg lighter than the wall unit and easier to add to over time. Usable energy stated at 4.68 kWh against 5.12 kWh nameplate. Two trade-offs against the RLW-5.4-X1 wall model. It parallels to 8 units, not 16 (5.12 to 76.8 kWh), and Phoenix publish no IP rating for it at all where the wall unit is IP65 - so keep it indoors and dry. Same 50 A recommended / 100 A maximum current and the same 6000-cycle, 5-year backing. Phoenix validate this to 6000 cycles and back it with a 5-year warranty, and rate it for 1C charge and discharge - so it will take its full nameplate current continuously rather than needing to be nursed. Smart BMS with cell-level management, protection against short circuit and over charge/discharge. Charge 0°C to +55°C, discharge -20°C to +60°C, storage -20°C to +35°C, humidity 5-95%, up to 2000 m. 16-cell string. Phoenix batteries are made by Century Engineering Industries (Pvt) Limited in Karachi under licence from Kukje Industry Battery Co. Ltd of Korea.