 The Space Station has 24 BCDUs, each weighing 100 kg.The BCDUs are provided by SS/L

Eighty-two separate solar array strings feed a sequential shunt unit (SSU) that provides coarse voltage regulation at the desired "V"mp.The SSU applies a "dummy" (resistive) load that increases as the station's load decreases (and vice versa) so the array operates at a constant voltage and load.The SSUs are provided by SS/L.