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Samlex 12v/24v 20 Amp Solar Charge Controller SMC-20

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Product InformationStore Part Number: SMC-20


The Samlex SMC-20 charge controllers are equipped with an electronic fuse, thus ensuring the optimal protection. They operate on the serial principle, and separate the solar module from the battery in order to protect it against overcharging. The SMC-20 charge controllers are universal charge controllers, which means they can be used with lead-acid batteries or gel batteries without the need for complex configuration settings.For larger projects, the charge controllers can also be equipped with special functions. These include the night light function, and selectable charging plateau and deepdischarge protection voltages.


  • 20 Amps
  • Series controller, PWM control
  • Automatic detection of 12/24V
  • Voltage and current regulation
  • Multistage charging technology
  • Current compensated load disconnection
  • Automatic load reconnection
  • Temperature compensation


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Tech Specs

  • Dimensions (LxWxH): 7.36 x 3.78 x 1.77 in
  • Weight: 0.77 lb
  • Shipping Weight: 2 lb
  • System Type: Series Type with PWM control
  • Battery Type: Factory preset for Lead Acid - Liquid Type
  • Nominal Battery System: 12 V or 24 V Auto Detection
  • 12 Volt System: 9 V to 17 V is detected as 12 V Battery
  • 24 Volt System: 17.1 V to 34 V is detected as 24 V Battery
  • System Maximum Current: 20 A
  • Self Consumption: < 4 mA
  • Minimum Battery Voltage To Start Operation: 9 V
  • Grounding: Common Positive Grounding or Negative Grounding on Negative Battery Terminal
  • Solar Input Maximum Open Circuit Voltage: < 47 V
  • Model: SMC-20
  • Manufacturer: Samlex
  • Solar Input Maximum Short Circuit Current: 20 A
  • Boost Charge Voltage: 14.4 VDC / 28.8 VDC
  • End Of Charge Voltage: 13.9 VDC / 27.8 VDC
  • Equalization Voltage: 14.7 VDC / 29.4 VDC
  • 12 Volt Low Voltage Disconnect Current Compensated: 11.6 V at Load Current = 0 A to 11.28 V at Load current = 20 A
  • 24 Volt Low Voltage Disconnect Current Compensated: 23.2 V at Load Current = 0 A to 22.56 V at Load current = 20 A
  • 12 Volt Low Voltage Reconnect Current Compensated: 12.4 V at Load Current = 0 A to 12.72 V at Load current = 20 A
  • 24 Volt Low Voltage Reconnect Current Compensated: 24.8 V at Load Current = 0 A to 25.44 V at Load current = 20 A
  • Load Current Compensation: LVD: − 16 mV/A; LVR: +16 mV/A
  • Night Light Function: Factory preset in OFF condition
  • Display Type: 5 Multicolor LEDs
  • Operating Parameters Displayed: Normal Operation, State of Charge, Load Status and Faults
  • Warranty: 2 Year
  • Manufacturer Part #: SMC-20
  • Made In: Germany

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