Mastervolt SCM20 Solar ChargeMaster



SCM20 Solar ChargeMaster


  • High efficiency: your batteries are charged quickly
  • Capacity for solar panel configurations of up to 3600 Wp
  • Suitable for AGM, gel, wet and Mastervolt Lithium Ion batteries
  • Fast and flexible setting of battery type
  • Battery temperature sensor for long lifespan
  • Automatic 12V/24V/48V detection
  • Switchable output
  • Noiseless operation
  • LCD display
  • Fully protected against overtemperature, overload, high/low battery voltage
  • High/low PV voltage, short circuit and reverse polarity

  • Display/read-out: LCD display with battery state of charge, status output, battery setting
  • Dimensions, H x W x D: 3.9" x 5.5" x 1.6"
  • Weight: 0.4 lb
  • Alarms: buzzer
  • Cooling: passive
  • Protection degree: IP20
  • Grounding: (-) terminal

Technical specifications
  • Technology: PWM (Pulse Width Modulation)
  • Temperature range (ambient temp.):-13 to 122 xF
  • Cable size: max. 16 mm} Litz wire
  • Safety protections: over temperature, over load, high/low battery voltage, high/low PV voltage, short circuit, reverse polarity & HV transients
  • Relative humidity: 95% non-condensing

Specifications battery charger
  • System voltage (battery): 12/24 V auto select
  • Battery types: AGM, gel, wet, Lithium Ion
  • Battery temperature sensor: yes
  • Lithium Ion protection: via DC relay & Multipurpose Contact Output, product code 77030500
  • Max. charge current at 25 xC: 20 A
  • Switchable output (max. current): 20 A
  • Energy consumption (night): 5 mA

Solar input (DC) specifications
  • Nom. PV current at 25 xC: 20 A
  • PV start voltage (12/24 V): 12.8 V/25.6 V
  • Max. PV voltage (Tmin): 50 V
  • Max. PV power (12 V): 360 Wp
  • Max. PV power (24 V): 720 Wp

WarningWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to


  • Amps - Output: 20
  • Battery Type: Gel/AGM/wet/Lithium Ion
  • Box Dimensions: 2"H x 7"W x 10"L WT: 1.5 lbs
  • UPC: 131802000

Quick Guide (pdf)
Owner's Manual (pdf)

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