Felicity Solar FLB48100WG1-H 5.12kWh battery5.12kWh 51.2V LiFePO4 battery, IP65, with heating

Overview

FLB48100WG1-H is the heated version of the 5.12kWh FLB pack. A built-in heating module allows charging and discharging from -20°C to +55°C, and a slow yellow flash of the status LED shows when it is heating. Otherwise it matches the standard model: 51.2V, 100Ah LiFePO4 cells, IP65 housing of 650×450×174mm and 48.5kg, 100A continuous current and up to 32 units in parallel.

• IP65 enclosure for indoor or sheltered outdoor use
• 5.12kWh, 11.7kWh and 16kWh at 51.2V
• Up to 32 units in parallel
• -H versions charge down to -20°C
• BMS, breaker, external fuse, aerosol fire suppression
• RS485/CAN, Wi-Fi and Bluetooth, 10-year warranty

How it works

The FLB series is the waterproof line of Felicitysolar low-voltage batteries: 51.2V LiFePO4 packs in IP65 housings for 48V hybrid and off-grid inverters. Each pack has its own BMS, a DC breaker used as on/off switch, an externally replaceable fuse and an aerosol fire extinguisher. Four LEDs show the state of charge and a status LED shows normal operation, faults and, on heated models, heating in progress.

Models with the -H suffix contain a heating module that brings the cells back to working temperature, so they can charge and discharge between -20°C and +55°C. Standard versions charge only from 0°C. The BMS case acts as a heat sink for its MOSFETs, so the manual notes that a warm housing during operation is normal.

Key features

Three sizes are offered: 5.12kWh (100Ah) and 11.7kWh (230Ah) wall- or floor-mounted packs, and a 16kWh (314Ah) floor-standing tower. Continuous current is 100A, 150A and 160A respectively, with peaks of up to 200A for 15s. Up to 32 identical packs can be paralleled. Depth of discharge is at least 95%, and the datasheet rates the 5.12kWh and 11.7kWh models for 6,000 cycles and the 16kWh model for 8,000 cycles.

Installation and compatibility

The manual allows indoor and outdoor installation, provided the site is shielded from direct sunlight, wind, conductive dust and corrosive gases, away from the sea and below 2000m. Wall-mounted packs use the supplied bracket and M8 anchors; floor installation is also possible. The box includes two 4AWG power cables rated for 100A, a grey RS485 cable for Felicitysolar inverters, a blue cable for other brands and a black cable for linking packs.

Parallel systems should be joined with a battery combiner box or a copper busbar. Felicitysolar publishes CAN communication guides for its low-voltage batteries with Victron, SolaX, Solis, SOFAR, Luxpower, Megarevo and Sol-Ark inverters. Without communication the manual gives 57.6V charge and float voltage and a 44.8V cut-off.

Monitoring and settings

Battery data can be read through a Felicitysolar inverter or, with other brands, sent by the built-in Wi-Fi to the Fsolar app and web portal, where the pack is added to a plant by scanning its serial number. Bluetooth is available for local checks. The status and SOC LEDs also display fault codes such as cell overvoltage, overcurrent or sensor faults.

Questions and answers