Preferably {HEAD ~ the system} includes {TAIL ~ a main charger}, the central processor dynamically controlling the supply of energy to the two or more series connected battery groups via the main charger 
includes
Preferably { HEAD ~ the system } includes { TAIL ~ a main charger } , the central processor dynamically controlling the supply of energy to the two or more series connected battery groups via the main charger
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH