They also prevent battery drainage by shutting down the system if stored power falls below 50 percent capacity and charge the batteries at the correct voltage level.
The solar charge controller sits between the energy source and storage and prevents overcharging of batteries by limiting the amount and rate of charge to your batteries. Charge controllers ensure your batteries are supplied with a steady and optimum level of power. There are many changing variables that influence how much power is being generated, such as level of sunlight, temperature, and a battery’s state of charge. Although not the first thing people think of when talking about going solar, controllers ensure your system runs efficiently and safely for years to come. Charge controllers are a critical component in every solar installation.