Deye Energy Storage Solution| SE-G5.1 Pro-B

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5.12 kWh low-voltage LiFePO4 rack battery

Compact 5.12 kWh rack battery for scalable low-voltage ESS. Deye SE-G5.1 Pro-B gives residential and light commercial systems a 51.2 V, 100 Ah LiFePO4 battery module with 5.12 kWh nominal energy and 4.6 kWh usable energy.

Flexible installation for wall, floor, or rack layouts. The battery measures 440 x 133 x 540 mm, weighs approximately 45 kg, and supports wall-mounted, floor-mounted, and rack-mounted installation, including 19-inch standard cabinet use with cabinet depth of at least 600 mm.

Protected, expandable, and easy to integrate. SE-G5.1 Pro-B includes a 125 A built-in circuit breaker, supports CAN2.0 and RS485 communication, and can scale up to 64 packs in parallel for systems up to 327 kWh.

Designed for long-cycle daily energy storage. The module is specified with 90% recommended DoD, ≥6000 cycles, 10-year warranty, and a broad certification set including UN38.3, IEC62619, CE, UK, VDE 2510-50, CEI 0-21, FCC, UL1973, UL9540A, and UL9540.

Wall, floor, or 19-inch rack installation for scalable ESS

Key Features

Start with 5.12 kWh and scale up to 64 packs.

Each SE-G5.1 Pro-B module provides 5.12 kWh nominal energy and 4.6 kWh usable energy. The platform can expand to 64 packs in parallel, giving installers a clear growth path for larger low-voltage ESS projects.

5.12kWh Nominal
4.6kWh Usable
64Max Packs

Built-in circuit protection for cleaner system design.

A 125 A built-in circuit breaker, 100 A max continuous charge / discharge current, and 150 A peak charge / discharge for 2 minutes at 25°C help support robust low-voltage battery system planning.

125 ABreaker
100 AContinuous
150 APeak

Broad certification coverage for project planning.

SE-G5.1 Pro-B includes certifications such as UN38.3, IEC62619, CE, UK, VDE 2510-50, CEI 0-21, FCC, UL1973, UL9540A, and UL9540, supporting compliance checks across residential and light commercial projects.

CE / UKRegional
UL1973Battery Safety
UL9540ESS Listing

Install on the wall, floor, or in a 19-inch rack.

The 440 x 133 x 540 mm, approximately 45 kg module supports wall-mounted, floor-mounted, and rack-mounted installation, including 19-inch standard cabinets with depth of at least 600 mm.

440 x 133mm Front Size
45kg Weight
3Install Modes

Technical Specifications

Core battery identity and capacity details.
Model
SE-G5.1 Pro-B
System Type
Low-voltage rack battery
Cell Chemistry
LiFePO4 (LFP)
Nominal Voltage
51.2 V
Nominal Energy
5.12 kWh
Usable Energy
4.6 kWh
Rated Capacity
100 Ah
Scalability
Max. 64 packs in parallel (up to 327 kWh); max. 32 packs without external setup
Battery electrical ratings and built-in protection.
Operating Voltage Range
43.2 V - 57.6 V
Recommended Charge / Discharge Current
50 A
Max. Continuous Charge / Discharge Current
100 A
Peak Charge / Discharge Current
150 A (2 min, 25°C)
Built-in Circuit Breaker
125 A, 2P, 60 Vdc
Rated DC Power
2.5 kW
Charge / Discharge Power
5.12 kW
Long-cycle performance and warranty information.
Recommended Depth of Discharge
90%
Cycle Life
≥6000 cycles (25°C ±2°C, 0.5C / 0.5C, 90% DoD, 70% EOL)
Warranty
10 years
Energy Throughput
16 MWh @ 70% EOL
Communication and LED status indication.
Communication Port
CAN2.0, RS485
Master LED Indicator
5 LED SOC plus 3 LED for working, alarming, and protecting
Mechanical data and installation options.
Dimensions (W x H x D)
440 x 133 x 540 mm
Weight Approx.
45 kg
Ingress Protection
IP20
Installation
Wall-mounted, floor-mounted, or rack-mounted (19-inch standard cabinet; cabinet depth ≥ 600 mm)
Altitude
≤2000 m
Temperature and humidity limits for suitable installation.
Charge Temperature
0°C to 55°C (optional heating: -20°C to 55°C)
Discharge Temperature
-20°C to 55°C
Storage Temperature
0°C to 35°C
Humidity
5% - 95%
Certification set for product planning and compliance checks.
Certifications
UN38.3, IEC62619, CE, UK, VDE 2510-50, CEI 0-21, FCC, UL1973, UL9540A, UL9540

DOWNLOADS & DOCUMENTS

Deye SE-G5.1 Pro-B DatasheetDatasheet Deye ESS User Manual SE-G5.1 Pro-B DE/EN V05User Manual

What's in the Box

  1. 1 Battery modulex1
  2. 2 3U-LB cablex1
  3. 3 3U-LP cablex1
  4. 4 Yellow-green ground linex1
  5. 5 M6 x 16 cabinet boltsx4 sets
  6. 6 Rack mounting lugs and M4 x 8 boltsx1 set
  7. 7 Simple stacking bracketsx4
  8. 8 Wall bracketsx2
  9. 9 M6 expansion boltsx4
  10. 10 User manualx1

Frequently Asked Questions

The Deye SE-G5.1 Pro-B is a low-voltage LiFePO4 rack battery with 51.2 V nominal voltage, 100 Ah rated capacity, 5.12 kWh nominal energy, and 4.6 kWh usable energy for residential energy storage planning.

Key highlights include 64-pack maximum parallel expansion, 125 A built-in circuit breaker, 100 A max continuous charge / discharge current, CAN2.0 / RS485 communication, wall, floor, and rack installation, and ≥6000 cycle life at 90% DoD.

Specifications include 43.2-57.6 V operating voltage, 50 A recommended charge / discharge current, 100 A max continuous current, and 150 A peak for 2 minutes at 25°C. Dimensions are 440 x 133 x 540 mm, weight is about 45 kg, protection is IP20, and altitude is listed as ≤2000 m.

SE-G5.1 Pro-B supports up to 64 packs in parallel. Up to 32 packs can be used without external setup, and supported systems can scale up to 327 kWh.

Specifications include wall-mounted, floor-mounted, and rack-mounted installation. For rack use, the cabinet should be a 19-inch standard cabinet with at least 600 mm depth.

Specifications include UN38.3, IEC62619, CE, UK, VDE 2510-50, CEI 0-21, FCC, UL1973, UL9540A, and UL9540.

Specifications include CAN2.0 and RS485 communication, plus a master LED indicator with 5 LED SOC display and 3 LEDs for working, alarming, and protecting.

Specifications include a 10-year warranty and ≥6000 cycles at 25°C ±2°C, 0.5C / 0.5C, 90% DoD, and 70% end-of-life.

Specifications include 0°C to 55°C charge temperature, -20°C to 55°C discharge temperature, and 0°C to 35°C storage temperature. It also notes optional heating for charging down to -20°C.

The package includes the battery module, 3U-LB cable, 3U-LP cable, yellow-green ground line, M6 x 16 cabinet bolts, rack mounting lugs and M4 x 8 bolts, simple stacking brackets, wall brackets, M6 expansion bolts, and the user manual.

The datasheet lists 2.5 kW rated DC power and 5.12 kW charge / discharge power for SE-G5.1 Pro-B, alongside the current and voltage ratings shown in the technical table.

Yes. SE-G5.1 Pro-B supports rack-mounted installation in a 19-inch standard cabinet with at least 600 mm cabinet depth.

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