Double pole circuit breakers. These protect the DC cables between batteries and inverters against overcurrent and short-circuit and allow easy isolation for installation or maintenance of the inverters.

Distribution box, suitable for use with the SMA Sunny Boy Storage 3.7/5.0/6.0 inverters to allow operation to continue in case of mains power blackouts. Includes contactors to ensure compliant earth switching.

Automatic transfer switch, suitable for the SMA 'Flexible Storage System' which allow operation to continue in case of main power blackouts. Contactors ensure compliant earth switching.

Designed for use with multiple BYD B-Box 13.8 Lithium Ion batteries together withSunny Island inverters. May also be used with other parallel battery banks and inverter/chargers if ratings suit.