This is a Deye SUN 50K, a 50kVA/50kW three-phase, grid-tied, high-voltage solar inverter designed for commercial and industrial solar installations rather than residential rooftop use. Being high-voltage and grid-tied means it's built to work with a high-voltage battery bank and feed/interact with the utility grid, typical of larger commercial solar-plus-storage systems used in South Africa partly to reduce grid dependence during load shedding. It includes a WiFi dongle for remote monitoring and configuration via Deye's app/portal. At 50kW this is a serious commercial-scale unit intended for installers and businesses sizing a large solar array, not a small home system.