The solar charge regulator main task is to charge the battery and to protect it from deep discharging.
Due to overcharging electrolyte boiling could occur causing damage to the battery or even its destruction. Deep discharging could also damage the battery.
Charge regulator electronics is most sensitive and crucial to assuring stable photovoltaic system operation.
Charge regulator malfunctioning result in high maintenance cost including battery replacement.
For small photovoltaic systems charge regulators from 5 A to 30 A are available.
Some of them could be used in both 12 V and 24 V DC systems.