Product Details

Model No
Selling Unit EACH
Categories Solar Charge Controllers/Regulators
Power Products & Accessories
DC Solar Conversion
Description Programmable Lumiax SMR20-N5-Li PWM LiIon / LiFePO4 Solar Charge Controller Input max 55VDC to Output 12VDC or 24VDC @ 20A
Brand Lumiax
Width 68mm
Height 18.6mm
Length/Breadth/Depth 82mm
Weight 190g

Fully programmable SMR20-N5-Li PWM Lithium Ion (LiIon) / Lithium Iron Phosphate (LiFePO4) Solar Charge Controller.


  • 12V/24V automatic recognition.
  • Suitable for Lithium Ion and Lithium Iron Phosphate batteries.
  • Charging target and charging recovery voltage can be set.
  • Day/night threshold can adjust automatically.
  • External temperature sensor, automatic temperature compensation.
  • Full automatic electronic protect function.

Specifications (for 'Programmable' specifications, please see note below):

  • Max solar and load current: 20A
  • System voltage: 12V or 24V
  • Charging voltage target: 10.0V ~ 32.0V (Programmable)
  • Charging voltage recovery: 8.5V ~ 31.8V (Programmable)
  • Low voltage disconnect: 8.0V ~ 30.0V (Programmable)
  • Low voltage reconnect: 8.6V ~ 31.0V (Programmable)
  • Day/night threshold: 3.0V ~ 20.0V (Programmable)
  • Battery type: Lithium Ion (LiIon), Lithium Iron Phosphate (LiFePO4)
  • Max solar voltage: 55V
  • Max battery voltage: 40V
  • Self-consumption: 10mA
  • Ambient temperature: -35°C to +60°C
  • Protection degree: IP67


PLEASE NOTE: The SMR20-N5-Li Solar Charge Controller can be programmed to user specific requirements. Requirements will differ between battery chemistries:- ie LiIon or LiFePO4. Please complete this form SMR20-N5-Li Programming Requirements and send to us with your order.

Alternatively, contact us to discuss your specifications so we can program the SMR20-N5-Li for you. If you would like to program it yourself, we recommend purchasing the S-UNIT with the SMR20-N5-Li.

Replacement for previous model SMR20-LF-Z.

Data Sheet

Customer Number: