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When install solar controller, you must know these things!
- May 07, 2018 -


In a solar power generation system, the solar controller is the core component, and the system configuration must conform to the requirements of the solar charging controller, otherwise it may cause the whole system not to work or the system is inefficient. It will burn the controller directly and cause serious consequences. Here are a few things that must be known about the safe installation of solar controllers.


1. Solar panel specification

The specifications of solar panels mainly consider two parameters, power and open circuit voltage. The power determines the size of the charging current as long as it does not exceed the rated charging current of the controller.


Open circuit voltage: PWM and MPPT controllers have different requirements for open circuit voltage. PWM controller charges 12V solar cells with open circuit voltage of 20-22V. The 24V system is 2 times.


MPPT controller: solar panels input power and open circuit voltage as long as less than the rated value of solar controller can be. It has nothing to do with the voltage of the battery.


Solar charge controller.jpg


The common system controller outputs DC voltage, and the output voltage is close to the battery voltage. The maximum load current can not be greater than the specified value of the controller.


If it is a solar street lamp controller, we must also consider the working voltage of the LED lamp, and whether the controller needs LED lamp driver function.


Three. Battery parameters

According to the requirements of solar controller, the battery must consider the following parameters: battery type, battery voltage and battery capacity.

Type of battery: lead-acid battery, lithium battery

Battery voltage: common 12V/24V/48V

Battery capacity: it depends on the working time and power of the load.


The configuration of the solar power generation system involves a lot of content, so it will be more reasonable to consult the solar controller manufacturer and assist the design of the system as far as possible before the project is done.