Morningstar Sunsaver Duo 12V 25A Dual Bat

This item can usually be shipped within 3 business days. For further details, please call us on 133 SUN
Rated solar input:
25 V
Rated load ouput:
Regulation voltage (sealed battery):
14.1 V
Regulation voltage (flooded battery):
14.4 V
Nominal system voltages:
12 V

Mechanical Characteristics

170 mm
56 mm
170 mm
0.5 kg




Morningstar’s SunSaver Duo is an advanced PWM two battery controller for RV’s, caravans, boats and cottages. The Morningstar Sunsaver Duo 12V 25A Dual Battery can charge two separate and isolated batteries at the same time, such as a “house” and an engine battery, based on user selectable priorities.


  • 5 Year Warranty Period

Technical Specifications 

Electrical Specifications
Rated solar input 25 A
Battery voltage 12 V
Min battery voltage 1 V
Max battery voltage 15 V
Max solar voltage 30 V
Self consumption Controller 6 to 10 mA
Remote meter 6 to 15 mA
Battery Charging
Regulation Sealed battery 14.1 V at 25 ºC
Flooded battery 14.4 V at 25 ºC
Float voltage 13.7 V
Equalization voltage 14.8 V
Temp compensation -30 mV per ºC (25 ºC reference)
Type of charging Series PWM: 4 stage : bulk, PWM, float and equalize*
Battery charging priority 90% / 10% ; 50% / 50% and customize via PC connection
Mechanical Characteristics
Controller 17.0 x 5.6 x 4.1 cm
Meter 9.7 x 9.7 x 3.1 cm
Meter back 7.4 cm dia, 2.8 cm deep and Fits 7.6 cm round hole
Weight Controller 340 g and Meter 135 g
Largest wire 16 mm²
Meter wire 10 m
Operating ambient temperature Controller -40ºC to +45ºC
Meter -20ºC to +60ºC
Humidity 100% non-condensing
Tropicalization Controller Epoxy encapsulation Anodized aluminum case Corrosion resistant terminals
Meter conformal coated printed circuit board
Meter Display
Backlighting Push button activated
LED's Charging status : Errors : Battery level

Battery #1 & #2 voltage

Battery charge priority

Minimum / maximum voltages

Solar charging amps / amp-hours




Electronic Protections
Solar Short Circuit Height temperature
Solar Over Current Lighting
Reverse polarity Reverse current at night

*used on flooded battery only

Quality and Safety 

  • CE Compliant
  • Manufactured in a certified ISO 9001 facility

Downloads and Manuals 

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