When you design a solar electric system, you have to use something to prevent your battery or batteries, from being overcharged by the solar module(s). You need somewhat like an interface between the solar modules and the battery(s) to insure a good function in your solar electric system. This is where we need the charge controller.
When a battery voltage rises to a preset maximum, where the battery is completly charge, this element (charge controller), reduce or stop the solar charge. Some charge controllers are that simple, but others include meters that help you read the volts and amps of the solar modules and the battery(s).
Always select a charge controller capable of handling more amperes than your solar modules are rated to generate. For example, if your solar modules is rated to generate 37 amp, then use a 60 amp controller to void problems later on. Also, be sure the charge controller you use, is designed for your battery voltage, this could be 12, 24 or 48 volts.
It is a good idea, though it is an option, to use a controller with built-in meters, however, if you plan to use a DSPS-1 power reading panel, you can use a charge controller without a buil-in meter. It is recommended, that a voltage power reading like the DSPS-1, be used in a solar power station, because you can read voltages and current from the different elements that are integrated in a solar power station, this can be in the form of analog or digital meters.
This site was updated on 08/18/2017