victron energy BlueSolar PWM-DUO Charge Controller User Manual

victron energy BlueSolar PWM-DUO Charge Controller


  • PWM controller
  • Charges two separate batteries. For example 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.


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)
Self-consumption 4 mA
Protection Battery reverse polarity (fuse)        Output short circuit       Over temperature
Operating temp. range -35 to +55°C (full load)
Humidity  (non-condensing) Max 95%
Charge voltage ‘absorption’   (2) 14.4V / 28,8V
Charge voltage ‘float’   (2) 13.7V / 27,4V
Battery temperature sensor Yes, internal sensor (remote sensor optional)
Temperature compensation -30mV/ºC / -60mV/ºC
Protection class IP20
Terminal size 6 mm² / AWG10
Weight 0,18kg
Dimensions (h x w x d) 76 x 153 x 37 mm
Safety IEC 62109-1
EMC EN 61000-6-1, EN 61000-6-3, ISO 7637-2
1) For 12V use 36 cell solar panels

For 24V use 72 cell solar panel or 2x 36 cell in series

2) See manual for alternative voltage settings


[xyz-ips snippet=”download-snippet”]