BlueSolar PWM DUO 12/24V – 20A

PV voltage up to 150 V

The BlueSolar MPPT 150/70 and 150/85 charge controllers will charge a lower nominal-voltage battery from a higher nominal voltage PV array. The controller will automatically adjust to a 12, 24, 36, or 48V nominal battery voltage.

Spec Sheet


  • PWM controller
  • Charges two separate batteries. E.g. the starter battery and the service battery of a boat or mobile home
  • Programmable charge current ratio (standard setting: equal current to both batteries)
  • Charge voltage settings for three battery types (Gel, AGM and Flooded)
  • Internal temperature sensor and optional remote temperature sensor
  • Protected against over current
  • Protected against short circuit
  • Protected against reverse polarity connection of the solar panels and/or battery.

Technical Data

BlueSolar PWM-DUO 12/24-20
Battery Voltage 12/24 V with automatic system voltage detection
Rated charge current 20A
Second battery output Yes
Automatic load disconnect n. a.
Maximum solar voltage 28V / 55V (1)