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Battery Pylontech Fidus 5.12 kWh, 51.2 V LiFePO4, self-heating, FB-L-5.12-EU-Pro
  • Battery Pylontech Fidus 5.12 kWh, 51.2 V LiFePO4, self-heating, FB-L-5.12-EU-Pro
  • Battery Pylontech Fidus 5.12 kWh, 51.2 V LiFePO4, self-heating, FB-L-5.12-EU-Pro

Battery Pylontech Fidus 5.12 kWh, 51.2 V LiFePO4, self-heating, FB-L-5.12-EU-Pro

51.2 V
€1,279 Tax included

€1,066 Tax excluded

Pylontech Fidus FB-L-5.12-EU-Pro is a 51.2 V LiFePO4 battery with a nominal energy of 5.12 kWh (4.86 kWh usable, 95 % depth of discharge) and automatic cell heating for low temperatures. Continuous current of 100 A, CAN and RS485 communication, ingress protection IP65, weight 45 kg.

Reference FB-L-5.12-EU-Pro

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Pylontech Fidus FB-L-5.12-EU-Pro - self-heating LiFePO4 battery, 5.12 kWh, 51.2 V

Pylontech Fidus FB-L-5.12-EU-Pro is a low-voltage LiFePO4 battery (51.2 V, 5.12 kWh) with automatic cell heating, for residential energy storage. It can be mounted on a wall, on the floor or in a rack, communicates over CAN or RS485 and has ingress protection IP65.

Main features:

  • Nominal energy: 5.12 kWh (4.86 kWh usable)
  • Nominal voltage: 51.2 V
  • Continuous current: 100 A charge and discharge
  • Heating: automatic, from -20 °C
  • Communication: CAN, RS485
  • Ingress protection: IP65
  • Weight: 45 kg

The maximum continuous charge and discharge current is 100 A, and the peak current is 103-120 A for 2 minutes and 121-200 A for 15 seconds. One group can have up to 20 batteries (19 in multi-group setups) and the system up to 6 groups. For paralleling several groups, the datasheet requires an LV-HUB. The manufacturer states scalability from 5 kWh to 583 kWh (1-114 modules).

The self-heating version (Pro) works between -20 and 55 °C. Heating activates between -20 and -10 °C, and charging and discharging are allowed only above -10 °C; the BMS limits the current at extreme temperatures. The enclosure has ingress protection IP65 and corrosion resistance class C5-M, and the design life is 15 years, with 8000 cycles at 25 °C, 0.5C and 5-95 % SOC. The interfaces include LEDs, Bluetooth and Wi-Fi (optional).

The official Pylontech list of compatible inverters (version 2.46, updated 7 July 2026) has one shared column for familia Fidus (FB-L-5.12), which lists Victron Energy inverters (Multiplus and Quattro 48 V, via Venus OS, CAN communication), Solis (S6-EH1P-L, S6-EH1P-L-PLUS, S6-EH3P-NV-YD-L) and Deye (SUN-SG01LP1, SUN-SG03LP1, SUN-SG04LP1, SUN-SG04LP3 and SUN-SG05LP3 series), among other manufacturers. Firmware V1586 is stated for the Deye SG01LP1 and SG03LP1 series, and firmware 422 with Venus OS V2.15 or newer for Victron. In off-grid use with Victron, a Victron MPPT or another Victron-compatible PV inverter is required.

Technical specifications

Product typeBattery
Battery chemistryLiFePO4 (lithium iron phosphate)
Battery voltage class48 V
Nominal voltage51.2 V
Rated capacity100 Ah
Nominal energy5.12 kWh
Usable energy4.86 kWh
Capacity class2.5-6 kWh
Discharge voltage range42.5-56.8 V
Charge voltage range56-56.8 V
Max. continuous charge / discharge current100 A / 100 A
Peak charge / discharge current103-120 A (2 min), 121-200 A (15 s)
Depth of discharge95 %
Cycle life8000 cycles (25 °C, 0.5C, SOC 5-95 %)
Design life15 years
Parallel connectionup to 20 units per group (19 with several groups), up to 6 groups
Communication interfacesCAN, RS485
Built-in BMSYes
Heating functionautomatic (activates between -20 and -10 °C)
Display and connectivityLED, Bluetooth, Wi-Fi (optional)
Ingress protection (IP)IP65
Corrosion resistance classC5-M
Protection classI
Operating temperature-20 ... 55 °C (charging and discharging only above -10 °C)
Storage temperature-20 ... 60 °C
Relative humidity5-95 % (non-condensing)
Max. operating altitude4000 m
Short-circuit current< 1000 A / 1 ms
Coolingnatural
Installationwall, floor or rack
Standards and complianceIEC 62619, IEC 63056, VDE 2510-50, IEC 62477-1, UN 38.3, RoHS, REACH, WEEE, EMC/CE
Dimensions (height x width x depth)363 x 630 x 170 mm
Weight45 kg

Data sheet

Reference
FB-L-5.12-EU-Pro
MPN
FB-L-5.12-EU-Pro
Product type
Battery
Battery chemistry
LiFePO4 (lithium iron phosphate)
Battery voltage
48 V
Nominal voltage (exact)
51.2 V
Nominal capacity
100 Ah
Capacity class
2.5-6 kWh
Nominal energy
5.12 kWh
Max. continuous discharge current
100 A
Built-in BMS
Yes
Max. charge current
100 A
Communication interfaces
CAN-bus
RS485
Dimensions (H x W x D)
363 x 630 x 170 mm
Weight
45 kg
Ingress protection (IP)
IP65
Operating temperature
-20 ... 55 °C (charge and discharge only above -10 °C)
Max. relative humidity
95 %
Standards and compliance
IEC 62619, IEC 63056, VDE 2510-50, IEC 62477-1, UN 38.3, RoHS, REACH, WEEE, EMC/CE

We took these technical data from the manufacturer’s datasheet; transcription errors are possible. For 100% accuracy, please consult the attached datasheet.

Compatibility

Other compatible products

Compatibility is calculated automatically from the manufacturers’ technical data and is for information only. For complex systems, we recommend having the configuration checked by a consultant before ordering. Details in the Terms and conditions

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