How to Choose a Solar Charge Controller?

The most common use of a solar charge controller is to provide load power for solar inverters and to charge energy storage devices in solar power systems. Before buying a solar charge controller, we need to have a general understanding of this product, so as to choose a great solar charge controller with the most favorable price.

We should choose a panel with a higher configuration, so that the voltage when exiting the protection can be set lower according to our own needs. In addition, good heat dissipation of the controller will prolong its service life. Line loss compensation is the most difficult function to control at this stage. It needs to be controlled by software equipment, and then compensated according to the length and diameter of different lines. In low voltage, the line loss function is very important. Because when the voltage is low, the line loss will increase, and then the output voltage will be lower than the input voltage, which will lead to a smaller capacity of the storage device. Therefore, we should choose a cable that is not very thin, and the length of the cable should also be moderate.

Solar charge controller

Tips for selecting a solar charge controller

  • A solar charge controller with lower power consumption should be selected. The controller works 24 hours a day. If its power consumption is large, it will consume part of the power. And it is best to choose a controller with a power consumption of less than 3 mA.
  • It is necessary to choose a solar charge controller with high charging efficiency and three-stage charging control modes of strong charging, balanced charging and floating charging.
  • Choose a solar charge controller with high precision control. Non-high-precision control solar charge controllers often lead to high repair rate and poor reliability due to unreasonable product design with poor material.
  • The best choice is a solar charge controller with two separate controls, which is convenient for power regulation of lamps. At night, one or two paths of lighting can be automatically turned off for pedestrians to save electricity, and the power of LED lights can be adjusted. In addition, when setting the under-voltage protection value, try to adjust the under-voltage protection value greater or equal to 10.8V to prevent over-discharge of the battery.
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