Deye AI-W5.1-B
A 5.12 kWh low-voltage LiFePO4 battery in a sealed IP65 floor cabinet, expandable module by module to 184 kWh across 36 parallel units.
Technical Specifications
| Parameter | DEYE-AI-W5.1-B |
|---|---|
| Battery Data | |
| Energy | 5.12 kWh |
| Usable Energy | 4.6 kWh |
| Module Energy | 5.12 kWh |
| System Energy | 5.12 kWh |
| Max. Capacity | 184 kWh |
| Nominal Voltage | 51.2 V |
| Module Nominal Voltage | 51.2 V |
| System Nominal Voltage | 51.2 V |
| Operating Voltage | 44.8-57.6 V |
| Rated Capacity | 100 Ah |
| Module Capacity | 100 Ah |
| Cell Chemistry | LiFePO4 |
| Cycle Life | >6000 |
| End-of-Life Capacity | 70% |
| Energy Throughput | 16 MWh |
| Recommended Depth of Discharge | 90% |
| Rated DC Power | 2.5 kW |
| Max. Charge Current | 100 A |
| Max. Discharge Current | 100 A |
| Max. Charge/Discharge Current | 100 A |
| Recommended Charge/Discharge Current | 50 A |
| Peak Discharge Current | 150 A |
| Min. Battery Module Quantity | 1 |
| Battery Module Models | AI-W5.1-B, AI-W10.2-B, AI-W15.3-B, AI-W20.4-B, AI-W25.6-B, AI-W30.7-B |
| Parallel Units | 36 |
| Built-in Circuit Breaker | 125A 2P, 60Vdc |
| Protection Features | BMS Protection |
| Warranty (Years) | 10 |
| Mechanical & Interface | |
| Communication Ports | CAN2.0, RS485 |
| Dimensions | 720 x 569 x 255 mm |
| Additional Notes | Standard charge: 25±2°C constant current 50A to 57.6V |
| Module Dimensions | 720±3 x 300±1.5 x 254±1.5 mm |
| Module Weight | 53 kg |
| Status Indicator | Battery module: 3LED (working, alarming, protecting); PDU module: 5LED (SOC 20%-100%), 3LED (working, alarming, protecting) |
| Weight | 74.5 kg |
| Environment & Protection | |
| Altitude | <3000 m |
| Charge Temperature | 0-55 (-20 to 55 when heating on) °C |
| Discharge Temperature | -20 to 55 °C |
| Operating Humidity | 5-95 (non-condensing)% |
| Installation Location | Floor-Mounted |
| Enclosure IP Rating | IP65 |
| Storage Temperature | 0-35 °C |
| Cooling Type | Natural Cooling |
| Working Temperature | Charge: 0-55 (-20 to 55 when heating on) / Discharge: -20 to 55 °C |
Figures are measured at the test conditions the manufacturer’s datasheet states. A dash means the manufacturer publishes no figure for that model.
Availability & grid compliance in Germany
| Market | Germany |
| Grid authority / regulator | Bundesnetzagentur |
| Quotation currency | EUR |
| Support hours timezone | Europe/Berlin |
| Delivery & installation coverage | Berlin, Munich, Hamburg, Frankfurt |
Figures on this page are the manufacturer's own, measured at the test conditions the datasheet states — they do not change by country. What changes is the approval that has to be met before the unit is energised: in Germany that is Bundesnetzagentur. Confirm the grid code, import requirements and any local certification with them, or with us, before you order.
Key Features & Technical Highlights
- Decade-spanning cycle life: LiFePO4 chemistry rated for more than 6,000 cycles while keeping 70% of capacity at end of life.
- 4.6 kWh ready every night: Each unit yields 4.6 kWh of usable energy at the recommended 90% depth of discharge.
- Sealed for the outdoors: The IP65 floor-standing cabinet shrugs off dust and water, beside the house or in the garage.
- Charging through the winter: A built-in heating function lets the pack accept charge at temperatures down to -20 degrees C.
- Room to grow to 184 kWh: Parallel up to 36 units, with CAN2.0 and RS485 keeping every one in step with the inverter.
- 16 MWh design throughput: Rated for 16 MWh of energy throughput and covered by a 10-year warranty.
Frequently Asked Questions
Which inverters can the AI-W5.1-B work with?
It is a 51.2 V low-voltage battery with a 44.8-57.6 V operating window, so it pairs with low-voltage hybrid inverters that communicate over CAN2.0 or RS485.
How far can I expand an AI-W5.1-B system?
Up to 36 units can run in parallel, taking total capacity to 184 kWh; the AI-W line spans configurations from AI-W5.1-B up to AI-W30.7-B.
Can the AI-W5.1-B be installed outside?
Yes. The cabinet is rated IP65 and designed for floor mounting, with discharge supported from -20 to 55 degrees C and operation at altitudes up to 3,000 m.
What happens to this battery in cold weather?
Charging normally starts at 0 degrees C, but with the heating function active the pack accepts charge from -20 degrees C, so winter mornings do not lock it out.
How long should the AI-W5.1-B last?
The LiFePO4 cells are rated beyond 6,000 cycles with 70% capacity remaining, design energy throughput is 16 MWh, and the warranty runs for 10 years.