Consumer Units 1kW To 5kW Single Phase Solar Inverters. RCD / MCB ProtectionThe metallic enclosures are pre assembled and installed with 30mA 63A RCD and an MCB. Cable glands included. Range for 1kW, 1. 5kW 3kW, 5kW off grid solar inverters. Every off grid and grid tie solar inverter that feeds energy to a commercial or residential building should be protected with a DC residual circuit (RCD) and a circuit breaker (MCB). On this page, you will find a range of 4 consumer units that protect 1kW, 1. 5kW, 3kW and 5kW single phase