Mastervolt Solar ChargeMaster SCM20 PWM

The SCM20 PWM is a solar charge regulator that uses PWM technology to manage battery charging from solar panels, delivering safe, efficient power for boats, motorhomes, and other mobile installations. It supports 12V systems with 36-cell panels and 24V systems with 72-cell panels, enabling flexible configurations across marine and mobile applications.

• PWM-based charge regulation for steady, safe battery charging
• Panel cell compatibility: 36-cell (12V) or 72-cell (24V)
• Battery compatibility: suitable for all lead-acid batteries in 12V and 24V systems
• Rugged protection: water spray protection, tolerance to high ambient temperatures, and compatibility with negative grounding
• Optional temperature sensor available to optimize charging under varying conditions
• User interface: large display and switchable output with evening / night lighting function
• Designed for marine and mobile environments with a flexible, user-friendly design

Performance and electrical characteristics

Engineered to deliver reliable charge control for 12V and 24V lead-acid applications, SCM20 PWM adjusts charging based on panel input to preserve battery health. The device supports the specified panel configurations (36-cell for 12V and 72-cell for 24V) and accommodates negative-ground installations, improving compatibility with typical boat and vehicle electrical systems.

Installation and maintenance

Installation guidance and detailed wiring diagrams are provided in the official Mastervolt documentation. The SCM20 PWM is designed for marine and mobile environments; periodic inspection of connections and cabling is recommended. If the optional temperature sensor is used, ensure correct placement and connection per the manual.

Solar ChargeMaster SCM20 PWM

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 12V systems) and 72 cells panels (in 24V 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 & Flexible

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