Backup Box-B0 (1-phase for LUNA2000) switching box Backup Box B0, single-phase emergency power supply in the event of a power failure, puts the inverter into the grid-connected or grid-decoupled status, if the public power grid fails, the inverter switches to the grid-decoupled status and supplies power to grid-decoupled loads via an energy storage system (ESS) in emergency mode, when the grid is restored, the inverter switches back to the grid-connected status, suitable for single-phase inverters of the SUN2000-2-6KTL-L1 product series, maximum apparent power backup output 5000 VA, maximum output current 22.7 A, switching time less than 3 seconds
