Standalone battery module with integrated BMS from Felicity, designed for low-voltage stackable battery systems from the FLS48100 series for indoor installation. The entire battery system can be assembled from 1 to 8 low-voltage battery modules, providing a total capacity of up to 40.96 kWh. The main battery module includes not only a 5.12 kWh battery but also an information display, BMS, and a base stand. The battery module uses LiFePO4 technology, has a capacity of 5.12 kWh, output voltage of 51.2 V, IP21 protection rating, and RS485/CAN communication interfaces. The total dimensions are 600 x 450 x 180 mm, with a weight of 53 kg.