Zhejiang Longchi Technology Co., Ltd.

0086-572-2596377 sales@best-solar-panels.com

20A PWM controller with LCD display(Green)

Output Current:40A
Input voltage:12V/24V
Size:190*110*40mm
Color box packing
0.56Kg/PCS,30PCS/CTN
Carton size:65*27*27cm
0.047m³/ctn

  • PRODUCT DETAIL

The controller will be hot in process of working, please keep the environment ventilation, away from flammable.
The open circuit voltage of solar panel is too high, (especially 24V and 48Vsystem), please take care.
The battery has acidic electrolysis, please put on goggles during installation. If you accidentally exposed to the electrolysis, please rinse with water.
Please avoid reverse connection or short circuit connection under 48V system, or the product easy to destroy.
The battery has huge power, prohibit any conductor short circuit the positive and negative pole of battery. Suggest to adding a fuse between battery and controller. (Slow motion type, the action current of the fuse should be 1.5 times ratedcurrent of controller.)
The suggestion of using
• The controller could detect the temperature of environment to adjust the voltage of charging, so that the controller should be closed to battery as near as possible.
Recommend system current density of cables less than 3A/mm2.
Try to use multi strand copper wire in order to connecting with the terminal firmly. Loose power connection and/or corroded wires may result in resistive connections that melt wire insulation, burn surrounding materials or even cause fire.
The battery should be full charged each month. Or the battery will be destroyed.
The default night display of controller: When the solar panel input voltage have been detected by controller less than sensor
Protection Function
Battery Low Voltage Protection(LVD)
When the battery voltage less than 11V, the LVD protection started. The output cut : [M ] off, at the same time the battery symbol — and warning flash. Please increase charge current or increase charge time.When the battery voltage more than 12.6V, the protection will be closed. The load output is come back or press button force to unlock at main interlace.
Battery Over Voltage Disconnection (OVD)
When the voltage of battery more than 6.5V, the over voltage protection will be started. The load cut off, at the same time the load and warning symbol flash. When the voltage of battery was decreased to 15V, the protection will be release. The output of the load is back.
Load Over Current Protection
When the load is short circuit or overload, the output cut off, at the same time the load symbol and warning flash. Please confirm if there is short circuit on the load terminal, decrease the power of the load.30s later the controller will be auto restart with unlock, or press button force to unlock at main interlace.
High Voltage Disconnection Protection (HVD)
When the battery was charged to 13.8V, the PWM function will be started, the charge symbol will be flash, and the voltage of battery has been limited.
When the load join into timer or sensor mode, if the reset working time more than actual night time, the load output will be closed at sunrise, although the working time is not reach to setting hours. For example, the local actual night time is 10hours, user reset the working time at night is l2hours, but 10hours later the output will be closed automatically, the balance hours will be back to zero. The load will be working with next sunset signal
g) Load rationing setup
This parameter is for load discharge capacity setup. When the load using capacity (AH) was reached to set value, the load will be closed automatically, at the same time the setup value back to zero, Please manual start load or reset Load rationin consumption capacity of the load. The g default consumption capacity of the load is unlimited. The procedure is same with (c).
System Voltage Select
This parameter designed for customers wide range voltage requiring. The default display UTO system voltage I 2/24v auto. When battery voltage is more than 18V, the controller will be auto change to 24V system with 24V control data.When battery voltage is less than I 8V, the controller will be auto change to 12V system with 12V control data.
If the system voltage is set to “1 “, the controller will be work under 12V version forever. The battery voltage is not valid. The reset data will be working after reconnection.
If the system voltage is set to “2”, the controller will be work under 24V version forever. The battery voltage is not valid. The reset data will be working after reconnection.identification point voltage, this graphic symbol will be light.
The default daytime display of controller: When the solar panel input voltage have been detected by controller more than sensor identification point voltage, this graphic symbol will be light.
The indicator of PV array parameter: When the solar panels data was displaying, this graphic symbol will be light. For example the voltage of solar panel.
The indicator of battery parameter: When the battery parameter was displaying, this graphic symbol will be light. For example the voltage of battery, temperature of battery.
The indicator of load parameter: When the load parameter was displaying, this graphic symbol will be light.
System Voltage: When the LCD shows different system voltage, the controller will adjust the technical data automatically.
Numerical Display Area
Timer Setting Function
Switch Graphic Symbol.
Unit Symbol Value
Warning: When there is fault, this graphic symbol will be light.
The indicator of Load status: Load on, Load off.
The indicator of Output power: When the load terminal have output, this graphic symbol will be light.
The indicator of capacity of battery: When the battery was in different capacity, the strip-type will show.
The indicator of charge status: When the controller is charging, the symbol will be light, float charge will be flash, no charging no display.
Installation Instructions
Controller Fixed
The controller should be installed well-ventilated place, avoid direct sunlight, high temperature and do not install in location where water can enter the controller.
Please select correct screw to fix the controller on the wall or other platform. Screw M4 or M5, Screw cap diameter less than 10mm.
Please reserve enough space between the wall and controller
Accumulated Charging Power(AH)
This parameter is charging AH counter, it shows total generating_capacity of solar panels. Long press more than 5s under this interface, the counter could back to zero.
Accumulated DisCharging Power(AH)
This parameter is discharging AH counter, it shows the power_consumption of the loads. Long press more than 5s under this interface, the counter could back to zero.
This parameter is High Voltage Disconnection (HVD) voltage.(Boost state voltage will be increase O.6V base on HVD) The controller will be started PWM function at this point(HVD), limited voltage rising. Press join in float voltage menu. Long press”“button5S, the parameter on the interface will be flash, here is set up state. Loose the button, press” __“ button again could operate plus data, press”’D” button could operate minus data. After finish the needed technical data, long press”“button save and come out set up state. automatically back to main interface.

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