The controller charger has voltage to match the voltage of the battery and the output voltage corresponds to the voltage of the batteries. Because the controller charger has many types so need to choose the type of the controller charger would fit with the solar electric systems need computer For large battery systems, it is designed into several parallel ranges and each sequence will do a controller charger charge, these controls must work in parallel. The capacity of controller charger must be large enough to get electricity from solar batteries and enough power to recharge the batteries..
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