Battery capacity controller for multiple portable power stations

A method for controlling a portable power station (PPS) apparatus, wherein the PPS apparatus comprises two or more PPS units, the two or more PPS units connected together in a parallel arrangement to produce a total output current, wherein a first PPS unit operates as a voltage source and each of a second or more PPS unit operates as a current source, the method comprising:

• implementing a battery capacity controller (BCC) as a processing device;
• transmitting information including a battery capacity measure from each PPS unit to the BCC at selected time intervals;
• the BCC using the battery capacity measure of each PPS unit to implement a selected battery capacity control strategy that determines the amount of output current each of the second or more PPS unit contributes to the total output current at each selected time interval;
• and
• the BCC transmitting a control coefficient to each of the second or more PPS units corresponding to the determined amount of output current to be produced by each of the second or more PPS units.