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20A 12V/24V PWM Solar Charge Controller Voltage/Current meter charger timer Adjustable parameter SL-02B WinCong

20A 12V/24V PWM Solar Charge Controller Voltage/Current meter charger timer Adjustable parameter SL-02B WinCong

Item details
SKU: 1201 SL02B20A A4
Weight: 200 grams
Stock: Stock available

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SL-02B series solar controller upgrade increases the functionality of voltage and current display, has more Compatibility with a variety of storage batteries such as lead-acid battery ,VRLA battery , gelled electrolyte (GEL)Battery, 3.2V*4 iron-phosphate-based lithium battery 3.2V*8 iron- phosphate-based lithium battery ,3.7V*3 lithium battery,3.7V*6 lithium battery, and 3.7V*4 lithium battery.

User can set the model of battery.For your further satisfaction, additional 4 groups of Voltage adjustment parameters are available in the controller, which allows user to conduct personalized adjustment of the parameters for the selected battery.

For example, we can set the battery parameters which help prolong the service life, also old battery’s parameters can be adjusted to the favorable for longer discharge time, parameters can be changed into favorable according to various environments.

The adjustment function is up to the strict discharging requirements of some battery manufacturer, these characters enable user to operate freely compared with the previous version without this function.

The controller has the parameters for adjusting the threshold voltage of solar panel, by using the parameters, users can control the time of lighting on in the evening or lighting off at dawn, or for street lamp engineering, it can decrease the time difference result from the asynchronous on or off for multi- optical control switches.

Product Features:

  • Newly Upgraded: voltage and current display,Using 4 digital LEDs display and settings,intuitive and easy to use.
  • Newly Upgraded: The voltage of solar panel can be shown and checked, light-operated the threshold voltage is set flexibility which can recognize day and night reliably according to the voltage of solar panel. 
  • Newly Upgraded: The charge-discharge parameters of wide range can be adjusted flexibly, which is suitable for various kinds of battery, such as lithium battery. The old and new battery can all be applied to.
  • Newly Upgraded: Floating charge voltage can also be set, which can be especially applied to charge and discharge at the same time, controlling the voltage of battery flexibly
  • Newly Upgraded: Automatic temperature compensation and adjustable compensating parameter, for example, the lithium battery can choose the closing temperature compensation.
  • Newly Upgraded: The USB5V voltage-stabilized source output, for other 5V load like mobile phone charging that compatible USB. 
  • Rely on solar panels to start the controller works, To serious under-voltage or zero voltage battery charging, So that the battery back to normal.
  • Various protections include over-charge, over-discharge and over-load, as well as unique electron short circuit protection and connection-reverse protection. All the protections are harmless to any parts and fuse. fuse only as the end protection of a controller itself to protect the amount of internal short circuit damage.
  • Parameter is set to power-down save function, the system model and control parameters, and other important data are stored inside the chip, after power is not lost, to make the adjustment more convenient, more reliable system.
  • Automatic identification of system voltage classes
  • Intelligent PWM charge mode
  • Configurable load operating mode
  • Back discharge protection of battery
  • Low-voltage protection of battery
  • Transposition protection of battery
  • Overload and short-circuit protection



 Technical Parameter:










 Max charge current







 Max load current







 Max USB5V load







 Max Voltage of solar panel



 Voltage of battery


12V/24V Auto Discriminating 



default 14.4V/28.8V(can setting8.5V-35V) 



default 13.6V/27.2V(can setting8.5V-35V) 

 Low Voltage Reconnect


default 12.4V/24.8V(can setting8.5V-35V) 

 Low Voltage Disconnection


default 10.8V/21.6V(can setting8.5V-35V) 

 No load losses current


6mA ^^25mA(Only when digital LEDS be lighted)

Over-load and short circuit

 1.1 times of max current, works for 5 seconds or Short circuit,,the load is off at once and the indicator light flashing,Then wait 30  seconds, it will automatically restart to work. 



 Charging circuit voltage drop 


Load circuit voltage drop 




 Temperature compensation


 Working temperature 

 -35 ~ +60℃ 

 Storage Temperature 

 -40 ~ +75℃


 Humidity Requirements

 <=90% ,no condensation 

 Protection grades




 outline size(L*W*H)


 Mounting Hole Spacing


 Installation Cable Size

 <=8mm2(8# AWG)

  •  ** Precaution**:

    • Please read user manual after you receive the item. 
    • Double check polarity(+/-) after connect each cable to terminal. Use multimeter to double check polarity & voltage.
    • Do not reverse polarity & sort circuit. Damage caused by improper installation / Burning will void the warranty!
    • Make sure the solar panel output is within solar controller specification.
    • Make sure connect battery 1st before solar panel & load so that controller can determine solar system voltage. Battery should in normal voltage range.
    • Do not connect AC power Inverter to solar contoller load output, connect directly to Battery.
    • Although this controller has multiple protective measures, but this is not panacea!
  • 1 x 20A SL-02B Solar Charger
Shipping & Warranty
  • 30 Days against manufacturer defect
  • Postage Method: 
  • Item usually will be post out same day / next working day (depends on Pos laju collection schedule) if payment verified before 12pm except there is special announcement.
  • Item usually will be arrive next working day after posted out for most of the major city area in West Malaysia, Sabah, Sarawak & Labuan
  • Parcel usually will be arrive within 1-3 working days EXCEPT: P.O.Box, rural area and unexpected delay by pos laju or missed delivery, addresee unreachable, etc.
About Us
  • Nobody is perfect, but we will try our best to serve your satisfaction and will improve from time to time. Your suggestion & understanding is highly appreciated.
  • Do not hesitate to contact us,  any enquiry, question, suggestion kindly email to us for faster reply at:
    • sales@ioline2u.com (Sales & After Sales Enquiry , Suggestion / Complaint )
    • support@ioline2u.com (Technical Support)