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What is Solar Charge Controller PWM?
- Jun 15, 2018 -


The pwm solar charge controller is called the solar charge and discharge controller,  solar panel charge controller is used for solar power generation system, the control of multiple solar cell phalanx of battery and battery for solar power inverter load automatic control equipment. It is for battery charge and discharge conditions , regulation and control, and according to the load power demand control solar battery components and battery to the load power output, is the core of the entire photovoltaic power system control part.

Role of solar charge controller circuit

The most basic function of the  solar charge regulator is to control the battery voltage and turn on the circuit.Older controllers mechanically turn on or off the control circuit, stop or start the power to transfer to the battery.

Controllers are used in most photovoltaic systems to protect the battery from overcharge or overdischarge.Overcharging may cause the electrolyte in the battery to vaporize and cause failure, while overcharging may cause the battery to fail too soon.Overcharge and overdischarge may damage the load.Therefore, the controller is one of the core components of the photovoltaic power generation System and the main part of the Balance System BOS.

1. Power adjustment function;

2. Communication function: 1. Simple indication function; 2. Protocol communication function, such as RS485 Ethernet, wireless background management;

3. Perfect protection function: electrical protection backconnection, short circuit, overcurrent, etc.


Features of solar power controller

1. Intelligent control is realized by using MCU and special software;

2. Accurate discharge control using battery discharge rate characteristic correction.End of the discharge voltage is the control point by the discharge rate curve correction, eliminate the pure voltage controlled discharge of not accuracy, in line with the inherent characteristics of battery, at the end of the different discharge rate has different voltage;

3. Fully automatic control such as overcharge, over-discharge, electronic short circuit, overload protection and unique anti-reverse connection protection; The above protection does not damage any parts and does not burn the insurance;

4. The main charging circuit of serial PWM is adopted, which reduces the voltage loss of the charging circuit by nearly half compared with the charging circuit of the diode. The charging efficiency is 3% to 6% higher than that of the non-pwm, increasing the power consumption time.The lifting charge of overshoot recovery, normal direct charge and automatic control of floating charge make the system have a longer service life.It also has high precision temperature compensation.

5. The intuitive LED luminous tube indicates the current state of the battery, so that the user can understand the use status;

6. All the controls adopt industrial chips (only for industrial controllers with band I), which can operate freely in cold, high temperature and wet environment.At the same time, the timing control of crystal vibration is used.

7, cancelled the potentiometer to adjust the control set point, and the use of the E storage record each work locus of control, set up digital, to eliminate the vibration for potentiometer deviation, temperature drift error makes the control points, such as lower accuracy, reliability, factor;

8, using the digital LED display and Settings, one-click operation can complete all Settings, use very convenient intuitive role is to control the working state of the whole system, and battery over charging protection, over discharge protection role.Where the temperature difference is large, the qualified controller should also have the function of temperature compensation.Other additional functions such as light control switch and time control switch should be optional for the controller.

Solar Charge Controller PWM