This is a Huawei Power-M lithium battery storage module (part of Huawei's iSitePower-M / LUNA-style residential and small-business energy storage range), rated at 5kWh capacity, model MAB05B1. It's designed to pair with a compatible Huawei solar inverter (typically Huawei's FusionSolar/SUN2000 range) to store solar-generated or off-peak grid power for use later — commonly bought in South Africa specifically as a load-shedding backup solution, either on its own or stacked with additional modules for more capacity. As a battery module rather than a full system, it needs a compatible inverter and installation by a qualified solar installer; it isn't a standalone plug-and-use product.