Use this cable to connect the (discontinued) Phoenix Inverter 12/180, 24/180, 12/350 or 24/350 to a VE.Bus BMS or a BlueSolar MPPT Charger that features a load output: 

• VE.Bus BMS: the Inverter will be switched off when the batteries are empty
• BlueSolar MPPT Charger: connecting an inverter directly on the load output of a BlueSolar MPPT Charger is not possible; the inverter needs to be connected to the battery. Then use this cable to switch the inverter on and off with the load output.