Sometimes referred to as a solar regulatoror simply a solar charge controller, this component sits between the solarpanels and the battery bank. It continuously monitors and regulates the voltage going into your batterybank .

   The energy from your solar panels are inthe form of volts, this voltage can fluctuate depending on the amount ofsunlight you receive during the day, this can be detrimental to your battery ifit is above the battery voltage .

   When the battery has been charged fully itcan no longer store any incoming energy, if the battery voltage gets too highit will rapidly degrade, overheating and become a fire hazard .

   Most of the latest solar panel regulator have overload protection built in, much like a trip switch, it will protect againstany faulty appliances or short circuits.