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NH12V/20A Solar PWM Controller for Solar Power System



The intelligent control is realized by using single chip microcomputer and special software.

Accurate discharge control using battery discharge rate correction. Discharge terminal voltage is the control point corrected by discharge rate curve, which eliminates the inaccuracy of single voltage control over discharge and conforms to the inherent characteristics of the battery, that is, different discharge rates have different terminal voltage.

Full automatic control with overcharge, overdischarge, electronic short circuit, overload protection, and unique anti-reverse protection; Above protection does not damage any parts, does not burn insurance;

The serial PWM charging main circuit is adopted to reduce the voltage loss of the charging circuit by nearly half compared with the charging circuit using diode, and the charging efficiency is higher than that of non-pwm by 3% to 6%, which increases the power consumption time. Lifting charge after overdischarge recovery, normal direct charge and automatic control of floating charge make the system with longer service life; It also has high precision temperature compensation.

Direct LED light emitting tube indicates the current battery status to let users know the usage status;

All controls are made of industrial-grade chips (only with I industrial-grade controllers) and can operate freely in cold, hot and humid environments. The crystal timing control is also used and the timing control is accurate.

The setting point of potentiometer adjustment control is cancelled, and the working control points are recorded by E square memory, so that the setting is digitized, and the factors of accuracy and reliability are eliminated because of the deviation of vibration and temperature drift of potentiometer.

With digital LED display and setting, all Settings can be completed by one-click operation, which is extremely convenient and intuitive to use.

Fully sealed waterproof type (-s) has complete waterproof and moisture-proof performance.

Technical indicators

System voltageNH12V/24V 20A
System current20A
No-load loss<7mA
Solar energy input voltage<50V
Charge circuit pressure drop0.2V
Discharge circuit pressure drop0.1V
Over voltage protection16.5V; ×2/24V
Over voltage recovery15.0V; ×2/24V
Balance charge voltage14.4V; ×2/24V(25ºC) time maintenance 180min
Increase charge voltage14.6V; ×2/24V(25ºC)  time maintenance180min
Float charge voltage13.8V; ×2/24V(25ºC)
Charging return voltage13.3V; ×2/24V(25ºC)
Discharge protection voltage11.1V; ×2/24V
Discharge protection voltage12.8V; ×2/24V
Temperature compensation-4.0mv/ºC/2V
Daytime identifying voltage7.0V;  ×2/24V
Night identifying voltage4.0V  ×2/24V
Over-load, short-circuit protection1.5 times rating current 30S
1.5 times rating current 10S overload current protection
3 times rating current short circuit protection
USB portUSB type A. Output :(5V/1A) 5V±1.5%.(Options)
Work temperature-25ºC to +60ºC
Protection degreeIP30
Outline size  144mm*76mm*33.5mm


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