SE-G5.1 Pro-B
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Deye SE-G5.1 Pro-B – Expandable LiFePO4 Low-Voltage Energy Storage for Residential and Commercial Systems
The Deye SE-G5.1 Pro-B is a 5.12 kWh capacity, low-voltage (51.2 V) LiFePO4 energy storage battery designed for residential and small commercial installations. Thanks to its cobalt-free LFP cell chemistry, intelligent BMS, and modular design, the SE-G5.1 Pro-B is a safe, efficient, and future-proof solution for those looking to increase their solar self-consumption and optimize their energy usage.
Why Choose the Deye SE-G5.1 Pro-B Energy Storage?
The Deye SE-G5.1 Pro-B battery is based on proven, cobalt-free LiFePO4 (lithium iron phosphate) cell chemistry, which offers a high level of safety, long service life, excellent efficiency, and high power density. The built-in intelligent BMS continuously monitors and balances cell voltage, current, and temperature, providing comprehensive protection. The modular design allows for simple expansion: up to 64 units can be connected in parallel, for a total capacity of 327 kWh, and thanks to auto-networking, system expansion is seamless.
Key Benefits of the Deye SE-G5.1 Pro-B
- Safe Cobalt-Free LFP – long service life, high efficiency, and high power density
- Intelligent BMS – comprehensive protection against overcharge, deep discharge, overcurrent, and temperature, with cell balancing
- Wide Temperature Range – reliable operation between −20 °C and +55 °C, with natural cooling
- Flexible Expandability – up to 64 units in parallel, for a total of 327 kWh
- Three Installation Options – 19″ standard design: wall, floor, or rack mounting for space-saving installation
- Convenient Monitoring – LED status indicators, remote monitoring and firmware updates, USB firmware updates
- Environmentally Friendly – non-toxic, pollution-free materials
- Long Service Life and Reliable Support – ≥6000 cycles, 16 MWh energy throughput (70% EOL), and 10-year warranty
Applications
The Deye SE-G5.1 Pro-B energy storage is ideal for residential and small commercial systems where high performance, reliable storage, and flexible installation in limited space are required. It helps store solar energy generated during the day for use in the evening or during peak hours – increasing self-consumption and reducing the cost of electricity purchased from the grid. When paired with a compatible inverter, it can also function as a backup power source.
Deye SE-G5.1 Pro-B Technical Specifications
| Parameter | Value |
|---|---|
| Cell Chemistry | LiFePO4 (cobalt-free LFP) |
| Nominal Capacity | 100 Ah |
| Nominal Voltage | 51.2 V |
| Operating Voltage | 43.2–57.6 V |
| Nominal Energy Content | 5.12 kWh |
| Usable Energy Content¹ | 4.6 kWh |
| Charge/Discharge Current | recommended 50 A, max. 100 A |
| Peak Current (2 min, 25 °C) | 150 A |
| Expandability | max. 64 units in parallel (327 kWh); max. 32 units without external unit |
| Recommended Depth of Discharge (DoD) | 90% |
| Dimensions (W × H × D) | 440 × 133 × 540 mm |
| Weight (approx.) | 45 kg |
| Status Indication | 5 LEDs (SOC 20%–100%), 3 LEDs (operation, alarm, protection) |
| Protection Rating | IP20 |
| Operating Temperature | charge: 0–55 °C (optional heating −20–55 °C) / discharge: −20–55 °C |
| Storage Temperature | 0–35 °C |
| Humidity | 5–95% |
| Altitude | 2000 m |
| Cycle Life | 6000 cycles (25±2 °C, 0.5C/0.5C, 90% DOD, 70% EOL) |
| Installation | wall, floor, or rack mounting (19″ standard, 600 mm depth) |
| Communication | CAN2.0, RS485 |
| Warranty | 10 years |
| Energy Throughput | 16 MWh @70% EOL |
| Certifications | UN38.3 / IEC62619 / CE / UK / VDE2510-50 / CEI 0-21 / FCC / UL1973 / UL9540A |
¹ Usable energy measurement conditions: 90% DOD, 0.5C charge and discharge at 25 °C; system usable energy content may vary depending on configuration.
Frequently Asked Questions About the Deye SE-G5.1 Pro-B Energy Storage
What is the capacity of the Deye SE-G5.1 Pro-B?
One unit has 5.12 kWh nominal energy content and 4.6 kWh usable energy, at 51.2 V nominal voltage. Up to 64 units can be connected in parallel, for a total capacity of 327 kWh.
How can the Deye SE-G5.1 Pro-B be installed?
Thanks to its 19″ standard design, it can be installed in three ways: wall-mounted, floor-mounted, or rack-mounted, allowing it to be adapted to the available space.
What temperature range does the Deye SE-G5.1 Pro-B operate in?
The battery operates between −20 °C and +55 °C with natural cooling; an optional heating function is also available for charging in low-temperature environments.
What warranty is provided for the Deye SE-G5.1 Pro-B module?
The module comes with a 10-year warranty, and its expected service life is 6000 charge cycles (90% DoD, 70% EOL), with 16 MWh energy throughput.
| Weight | 45 kg |
|---|---|
| Dimensions | 54 × 44 × 13,3 cm |
| Per pallet | 8 pcs |
Shipping costs
For orders over 10 units, we provide a custom quote. Our shipping partner is DACHSER.
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