a plurality of groups of distributed-input series-output (DISO) converters, each group of the plurality groups of the DISO converters are actively controlled by a common MPT controller, wherein

the plurality groups of the DISO converters are interconnected and each group of the plurality groups of the DISO converters comprising a plurality of DISO converters with outputs being series-connected across a battery bank having an output voltage V_BUS,

the common maximum power tracking (MPT) controller is configured to actively control one of the DISO converters in one group from the plurality groups of the DISO converters to update a present group-peak power voltage of the one group from plurality groups of the DISO converters while a remaining group from the plurality groups of the DISO converters are controlled to hold most recently grouped peak power voltages updated during a previously uniform time window of an active MPT control, and

each group of DISO converters comprises one or more DISO converters.