Pylontech Fidus PRO – 5.12kWh Low-Voltage IP65 Lithium Battery Module (FB-L-5.12-EU-Pro)

The Pylontech Fidus PRO (FB-L-5.12-EU-Pro) is a robust 51.2V low-voltage lithium battery module designed for demanding residential and light commercial energy storage. Built for outdoor use, it combines high usable energy, strong power delivery, and excellent environmental resistance with IP65 protection and C5-M anti-corrosion design—ideal for installations where reliability matters most.

With an integrated BMS, flexible installation options, and scalable system design, Fidus PRO is a future-proof storage building block for modern hybrid and off-grid solutions.

Key benefits

• High usable energy in a compact module: 5.12kWh nominal / 4.864kWh usable, with 95% DoD for excellent real-world capacity per unit.

• Strong power capability (1C continuous): Up to 100A continuous charge/discharge for stable performance in high-load scenarios.

• High peak current for short surges: Supports overload/peak capability up to ~200A for 15 seconds (system-controlled by BMS).

• Outdoor-ready durability: IP65 enclosure for harsh environments, plus C5-M anti-corrosion protection—excellent for coastal/industrial conditions.

• Low-temperature performance (PRO version): Built-in low-temperature heating function, supporting operation down to -20°C (EU-Pro model).

• Long lifetime: 6000 cycles (25°C) and 10-year design life under specified conditions.

• Flexible mounting: Suitable for wall mounting or rack/cabinet installation, making it easy to adapt to different sites.

• Smart communication & serviceability: CAN / RS485 communication, with support for upgrades/maintenance features (including remote upgrade support depending on system setup).

• Wide system scalability: Expand from a single module to larger storage banks—ideal for staged projects and future expansion.

Technical highlights (per module)

• Model: FB-L-5.12-EU-Pro

• Nominal voltage: 51.2V

• Nominal energy: 5120Wh (5.12kWh)

• Usable energy: 4864Wh (4.864kWh)

• Continuous charge/discharge: 100A / 100A

• Peak/overload capability: ~103–120A (2 min), ~121–200A (15 sec)

• Protection & build: IP65, Class I, Natural cooling, C5-M anti-corrosion

• Operating temperature (EU-Pro): -20°C to +55°C

• Dimensions: 638 × 361 × 168 mm

• Weight (EU-Pro): 44 kg (±0.5 kg)

• Communication: RS485 / CAN (optional Bluetooth/Wi-Fi indicated)

Scalability & system sizing

Fidus PRO is designed for modular growth:

• Up to 20 modules per battery group

• Up to 6 strings

• Maximum configuration up to 120 modules total (application-dependent)

This makes the platform suitable for everything from small residential systems to larger commercial storage banks (final sizing depends on inverter/PCS limits and system design).

Safety & compliance

Designed to meet relevant international requirements and transport standards, including:

• IEC 62619, IEC 63056, VDE-AR-E 2510-50

• IEC 62477-1, EMC/CE

• Environmental: RoHS, REACH, WEEE

• Transport: UN38.3

Notes for installers

• Compatibility: Works through CAN/RS485 with many inverter/PCS platforms—always verify the inverter compatibility list/settings for the specific project.

• Cold weather: The EU-Pro version includes a heating function to support cold-start/operation in low temperatures (system behavior depends on configuration and BMS conditions).

Compliance & certifications

Fidus PRO is listed with a broad set of relevant safety and compliance certifications, including IEC 62619, UN38.3, CE, EMC, IEC 63056, VDE-AR-E 2510-50, and IEC 62477-1, plus environmental directives such as RoHS, REACH, and WEEE.

Note for real-world sizing & performance

For practical system design, please note that battery performance can degrade at temperatures above 50°C or below 0°C. In addition, maximum module counts and achievable system capacity may depend on the inverter/PCS limits, wiring topology, and the installation method (e.g., rack/cabinet vs. wall mounting). Always follow the inverter manufacturer’s configuration rules and the installation guidelines in the manual.