Function and Classification Of Solar Charge Controller

Written by Sarah Hwong,Jan 20,2016

Solar charge controller is one of the core component for solar pv system, it take an important role to keeping balance for system operation. different scale pv system, take different effect. for small solar power system, controller can control charge and discharge, its function is to protect the storage battery; while the larger pv system, it is not only to protect the battery, but also keep pv system capacity and protect all system normal operation.

Specifically speaking, solar charge controller have as following functions :

First, prevent storage battery over-charge and over discharge, extending the battery service life;

Second, prevent controller, inverter and load device internal short, also avoid solar panel array s and storage battery polarity connected against to cause damage;

Third, temperature compensation function.

Besides, controller are equipped with working indicative function, let people grasp the system operational state in time.

According to the size of using solar pv system , such as solar panels input power and load power can be divided small power, medium-power , high-power and special controller etc.. in accordance with different circuit principle, can be divided to shunt, series, pulse width modulation, multi way control, two double stage voltage controller and MPPT control method; According to the different control way of discharge process, can be divided into conventional discharge and remaining electricity discharge control. 

In addition, with the development of technology, some also use a microprocessor circuit, called intelligent controller, this type controller realizes software programming and intelligent control, and with automatic data acquisition, data display and remote communication function.

 With National attaches great important in the field of solar photovoltaic, installed solar power system on the roof becomes more and more attractive. And the choice of solar charge controller is also an important factor. In generally, for a small solar photovoltaic power system controller, can choose function relatively simple and low cost controller. But for large photovoltaic system, taking into account the stability and efficiency of the system, it is necessary to choose a higher cost, function more comprehensive controller.