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Should the capacity of the SBOX PRO or SBOX GO not be enough, the SBOX RANGE EXTENDER (lower box) can expand the capacity. Two SBOX RANGE EXTENDERs can be connected to the SBOX PRO simultaneously, which all together provide a total capacity of 2400 watt hours (instead of 1200 watt hours).


The SBOX RANGE EXTENDER can therefore either be used to charge the SBOX, but it can also be charged BY the SBOX or other charging options (230V power socket, cigarette lighter, solar panel or wind turbine).