Removed from a decomissioned SMA SB-5000TL-21. Pictures show where located inside the inverter. 

The SB5G-ESS is a high-reliability power control and protection board designed for use in industrial energy systems such as Energy Storage Systems (ESS), power inverters, and power distribution modules. This board integrates fast-acting Littelfuse KLKD 4A fuses (600V AC/DC) along with solid-state relays, STMicroelectronics power transistors (MOSFET or IGBT), current shunt resistors, and heavy-duty terminal blocks.

Engineered to ensure protection against overloads and short circuits, the SB5G-ESS enables precise management of high-voltage circuits while maintaining compact design and efficient heat dissipation. Ideal for OEM energy applications requiring industrial-grade reliability.

•  Model: SB5G-ESS
•  Fuse Type: Littelfuse KLKD 4 (4A, 600V AC/DC, fast-acting)
•  Components: Solid-state relays, STMicroelectronics power semiconductors, shunt resistors
•  Function: Circuit protection & load control in energy systems
•  Application: ESS (Energy Storage Systems), inverters, industrial UPS, power converters