Mastervolt 131822000 SCM20 PWM Solar Charge Regulator

Mastervolt 131822000 SCM20 PWM Solar Charge Regulator

Regular price $78.20 Sale price$58.42 Save $19.78
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This solar charge regulator based on PWM technology is a great solution to charge your batteries with solar energy. Suitable for both 36 cells panels (in 12 V systems) and 72 cells panels (in 24 V systems). Its protection against water spray, suitability for high ambient temperature and compatibility with negative grounding, make it the perfect solar regulator for marine and mobile environments. Optionally, a temperature sensor is available.

Safe, user friendly, and flexible
The SCM20 PWM is suitable for all types of lead-acid batteries in both 12 V and 24 V. The device features a large display and switchable output with evening / night lighting function.

Mastervolt SCM20 PWM Solar Charge Regulator Manual:

download pdf


Specifications battery charger
System voltage (battery) 12/24 V auto select
Nominal charge current 20 A
Battery types AGM, Gel, flooded
Battery temperature sensor optional, product code 41500500
Switchable output (max. current) 20 A
Energy consumption (night) < 7 mA


Specifications solar input (DC)
Panel type (12 V system) 36 cells
Panel type (24 V system) 72 cells
Max. PV current (Impp) 20 A
Recommended PV power (12 V system) 360 Wp
Recommended PV power (24 V system) 720 Wp


General specifications
Cooling passive
Display/read-out backlit LCD with PV power, load power, battery voltage, charge current, warnings, battery state of charge, battery setting
Grounding common negative grounding
Protection degree IP23
Dimensions, hxwxd 98 x 189 x 53 mm
3.9 x 7.4 x 2.1 inch
Weight 0.5 kg
1.1 lb


Technical specifications
Technology PWM (Pulse Width Modulation)
Temperature range (ambient temp.) -20 °C to 50 °C, derating power > 40 °C
-4 °F to 122 °F
Cable size max. 16 mm²
Protections over temperature, over load, high/low battery voltage, high/low PV voltage, short circuit, reverse polarity & HV transients
Relative humidity 95 % non-condensing

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