10A & 20A Solar Charge Controller with LCD Display CM20D

 

CM20D 10 & 20 Amp Solar charge controller/regulator. Made in China by Juta

10 & 20 Amp Solar charge controller

CM20D with LCD graphic display .

Automatic recognition of battery voltage (12 V / 24 V)
2 years warranty
PWM shunt battery charging and protection
state of charge (SOC) battery regulation

1. Product Introduction
CM20D controller is an intelligent, multi-purpose solar charge and discharge controller. Fixed LCD display.

Features:

  1. Vivid LCD graphic symbols
  2. simple button operation
  3. Automatic Identification of System Voltage level
  4. Intelligent PWM charging mode
  5. Automatic Temperature Compensation (custom)
  6. Adjustable charge-discharge control parameters
  7. Settable operating mode of load
  8. Battery reverse-discharge protection
  9. Battery low voltage disconnection(LVD)
  10. Battery reverse connection protection
  11. Over current protection

 

 

 

P1: Digital parameters.
P2Charging indication. This symbol indicates that thesolar panel is charging the battery; without this symbol
means solar panel can not charge the battery because of low
voltage. If the symbol is flickering, means the battery is fully
charged and has entered float charging state.
P3Indication for solar panel. This symbol indicates thatthe connection of solar panel is detected by controller; without this symbol means the connection of solar panel can not be detected, or there is no sunshine on the solar panel.
P45 bars battery power indication.
P5: Discharging indication. This symbol indicates that controller is in output state, otherwise not in the output state. The flickering of this symbol indicates the damages of internal control devices.
P6load indication. This symbol indicates that controller is in output state, otherwise not in the output state. The flickering of this symbol indicates overload or the damage of the load.
P7A stands for the unit of current; H stands for hour.
P8:V stands for the unit of voltage.

2 Description of Button Function:
: This button turns on/off loads connected to controller.

This button also performs the function of "minus" in the parameter setting state.

: Interface loop switch button, use the button to scroll between screens.

This button also performs the function of “add” in the parameter setting state.


Viewing and setting the parameters:
The controller will default entry “battery voltage” interface after correct power-on. This is the main interface. Use the button could in turn visit the following parameters interface. If the parameters in that interface could be set, long press the button (>5seconds,numbers start flashing)to enter the parameter setting interface; calling off the parameter interface after long press the button again. (The numbers stop flashing).

3.1 State of Charge (SOC)
This interface shows the overall unit state (pictured at right)
It is the default interface after correct power-on, showing charging and discharging state, 5 bars battery power indication and the voltage of the battery.

3.2 Opening and shutting off the load
You can use the button on the controller to turn on/off
the loads connected. symbols on display changes accordingly as shown above.

 

3.3 Viewing and setting the floating voltage.
As pictured at right, the floating charge voltage is shown.

When the battery reaches the floating voltage, the controller will maintain this voltage by PWM charging mode to avoid overcharge.
To set floating voltage, press the button (>for 5 seconds,the numbers will start flashing)to set float voltage values use the / button to adjust. the parameters; to save, long press of the button again.
(The numbers will stop flashing) The floating voltage value will be stored by controller.

3.4 Viewing and setting of recovery after undervoltage
As pictured, the recovered voltage is shown. After the controller performs the function of under-voltage protection, the output of the load will be restored as soon as the battery voltage returns to above under-voltage setting.
press the button (>for 5 seconds,the numbers will start flashing)to set float voltage values use the / button to adjust. the parameters; to save, long press of the button again. (The numbers will stop flashing) The float voltage setting will be stored by controller.

3.5 Viewing and setting of under-voltage protection

As pictured at right, the value for under-voltage protection is showed. The
controller will cut off load circuit when batter voltage is lower than this value,
in order to avoid over discharge of the battery.
long press the button (>for 5seconds,numbers will start flashing)to enter the setting interface of under-voltage protection and use the / button to adjust the settings; long press the button again (The numbers will stop flashing). The low voltage disconnect setting wil be stored by the controller.

3.6 Viewing and setting of load working mode
As shown in the figure on right, the interface of load mode is displayed, and different numbers represent different load modes.
24h represents Normal Mode; the load is always in power under fault-free circumstances.
1h~23h represents Light Control with Time Control Mode; in this mode, the controller will start the load after darkness and will turn off the load after the number of hours set.
0h—represents Light Control Mode; Load will be on power at dusk / darkness and turn off the load at dawn.
long press the button (>for 5seconds,numbers will start flashing) and you can use the / buttons to adjust the parameers. Long press the button again (The numbers will stop flashing). The load timer setting setting wil be stored by the controller.

3.12 Viewing and setting of battery types
As pictured on right, different numbers represent different types of Battery.

b00:Lithium battery (other controls parameters need to be adjusted to match the
battery)


b01:Sealed battery (default type for the controller)


b02: Vented battery

b03:Gel battery


long press the button (>for 5seconds,numbers will start flashing)use the / button select battery type; long press the button again (The numbers stop flashing) to call off parameter interface after finish setting. Battery type setting wil be stored by the controller.

If you have any questions please get in touch:
Solar Energy Alliance Ltd.
info@solarenergyalliance.com


Tel: 01502 515532
8/9 Battery Green Road, Lowestoft, Suffolk, NR32 1DE

6. Technical data


Type
Parameters

CM20D

Type
Parameters

CM20D

Rated current

10A24V

20A24V

30A24V

Charge and discharge voltage drop

<0.2V|<0.1V

Rated voltage

12V/24V Automatic Identification

Charging mode

PWM mode

Voltage of solar panel

50V

Temperature compensation

-4mV/Cell/℃(to be customized)

Floating charge

13.8V/27.6V

Specification of the cables

5# AWG (6mm2)

Under-voltage protection

10.7V/21.4V

Working temperature

-20℃~60℃

Under-voltage recovery

12.6V/25.2V

Storage temperature

-30℃~70℃

Boost voltage

b01 sealed 14.4V/28.8V

(Duration:2hours)

Temperature requested

≤90%,No condensation

b02 Gel14.2V/28.4V

Dimension

88 mm×160 mm×37 mm

b03Flooded 14.6V/29.2V

diameter of mounting hole

64 mm×150 mm --Φ5

Open circuit losses

13mA

Weight

230g

Remark

 

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