Morningstar SunSaver Duo > 25 Amp 12 Volt PWM Charge Controller > Includes Remote Meter & 33' Cable

Morningstar's SunSaver Duo (SSD-25RM) is an advanced PWM two battery controller for RV's, caravans, boats and cottages. This product will charge two separate and isolated batteries at the same time, such as a "house" and an engine battery, based on user selectable priorities.

The SunSaver Duo employs Morningstar's legendary SunSaver controller technology, whose long-term track record for high reliability and improved battery charging is well-recognized in the solar industry. This controller also includes a backlit remote meter which may be mounted in or on a wall, and displays digital and pictorial status information about the solar power system.

The SunSaver Duo is epoxy encapsulated for environmental protection, is user adjustable via DIP switch or connection to a personal computer, and has an optional remote temperature sensor.

Features

Two Battery Charging

Solar charge current is shared between the two batteries based on a user selectable priority. When one battery is fully charged, all of the charge current flows to the other battery.

Provides Useful Information

The remote meter and LED's display system status data and any system errors. Custom icons and back lighting make the meter easy to read and understand.

Lower Cost

Two battery charging eliminates the added cost of two separate solar charging systems and the need for isolation between the batteries.

Easy to Install

The controller is installed near the batteries using the clearly labeled large wire terminals. The remote meter may be mounted in the wall or on the wall using the included frame. Also includes the meter wiring with RJ-11 connector.

Longer Battery Life

Four stage series PWM pulse charging and temperature compensation increases the useful life of the batteries.

Extensive Electronic Protections

The controller will not be damaged by wiring mistakes during installation. There are no fuses to replace, and the controller will automatically re-set after a wiring mistake.

Highly Reliable

Epoxy encapsulation protects the controller against dust and high humidity. Efficient electronics and a conservative thermal design allow the controller to operate reliably at high temperatures. Five year warranty and estimated 15 year life.

Specifications

Environmental

• Operating Ambient Temperature	Controller –40°C to +45°C / –40°F to +113°F
  	Meter –20°C to +60°C / –4°F to +140°F

• Humidity 100% non-condensing

• Tropicalization	Controller Epoxy encapsulation
  	Anodized aluminum case
  	Corrosion resistant terminals
  	Meter Conformal coated printed circuit board

Meter Displays

Electronic Protections

• Solar Short Circuit
• High Temperature
• Solar Over Current
• Lightning
• Reverse Polarity
• Reverse Current at Night

Battery Charging

The SunSaver Duo charges both sealed and flooded lead-acid batteries per the charging specifications in table 1 below. Sealed batteries are typically maintenance-free batteries that do not require water. Flooded batteries have removable caps that allow the addition of water when needed. DIP switches 1 & 2 select the battery type for Battery #1 and Battery #2 respectively. Choose the correct battery type for each battery.

• Regulation Voltage	Sealed Battery 14.1 volts (at 25°C, 77°F)
  	Flooded Battery 14.4 volts (at 25°C, 77°F)

• Float Voltage 13.7 volts
• Equalization Voltage* 14.8 volts
• Temp. Compensation –30 millivolts per °C (25°C reference)

• Type of Charging	Series PWM
  	4 stage: bulk, PWM, float, and equalize*
  	*used on flooded battery only

• Battery Charging Priority	90% / 10%
  	50% / 50%
  	Customize via PC connection

Mechanical

• Controller: 17.0 x 5.6 x 4.1 cm / 6.7 x 2.2 x 1.6 in.
• Meter: 9.7 x 9.7 x 3.1 cm / 3.8 x 3.8 x 1.2 in.

• Meter back:	7.4 cm / 2.9 in. diameter
  	2.8 cm / 1.1 in. deep
  	Fits 7.6 cm / 3 in. round hole

• Weight:	Controller 260 g / 0.57 lb
  	Meter 135 g / 0.30 lb

• Largest wire: 16 mm2 (#6 AWG)
• Meter wire: 10 m / 33 ft

Options

• Remote Temperature Sensor — Measures temperature at battery for improved battery charging

Certifications

• CE Compliant
• Manufactured in a certified ISO 9001 facility

Warranty: Five year warranty period. Contact Morningstar for complete terms.

Detailed Description

Features Diagram

The major features of the SunSaver Duo are shown below. An explanation of each feature is provided.

• Remote Temperature Sensor (RTS) Terminals

  A connection point for a Morningstar RTS (optional) to remotely monitor battery temperature.

• Local Temperature Sensor

  Measures ambient temperature. Battery regulation is adjusted accordingly.

• Status LED Indicator

  Provides system status and error indication.

• Settings DIP Switches

  Adjustment switches that define the operating parameters of the SunSaver Duo.

• Battery #1 Power Terminals

  Power connections for battery #1.

• Solar Input Power Terminals

  Power connections for solar module(s).

• Battery #2 Power Terminals

  Power wire connections for battery #2.

• Remote Meter Connection (RJ-11)

  A communication port for the Morningstar Remote Meter.