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Summary of Contents for Morningstar SunSaver Duo SSD-25RM
- Page 1 UNSAVER Installation and Operation Manual …. Dual Battery Charging Solar Controller for RVs, Caravans, and Boats …. Ratings ……………………………….………… Nominal Voltage 12 Volts Rated Solar Current 25 Amps www.morningstarcorp.com...
- Page 2 SUNSAVER DUO DIMENSIONS...
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Page 3: Table Of Contents
Contents 1.0 Important Safety Information ................. 4 2.0 General Information ....................5 2.1 Overview ......................5 2.2 Morningstar Accessories ..................7 3.0 Installation ....................... 8 3.1 General Installation Notes ..................8 3.2 Adjusting DIP Switches ..................9 3.3 Mounting ......................11 3.4 Wiring ......................... -
Page 4: Important Safety Information
1.0 Important Safety Information SAVE THESE INSTRUCTIONS: This manual contains important safety, installation and operating instructions for the SunSaver Duo solar controller. The following symbols are used throughout this manual to indicate potentially dangerous conditions or important safety instructions. WARNING: Indicates a potentially dangerous condition. Use extreme caution when performing this task. -
Page 5: General Information
2.0 General Information 2.1 Overview Thank you for selecting the SunSaver Duo solar charge controller. The SunSaver Duo is an advanced PWM dual-battery charge controller for RV’s, caravans, boats, and other installations that require simultaneous battery charging of two separate (isolated) batteries. - Page 6 Power Terminals (RJ-11) Figure 1. SunSaver Duo features 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.
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Page 7: Morningstar Accessories
The MSC converts the MeterBus RJ-11 electrical interface to a standard RS-232 interface which allows communication between the SunSaver Duo and a PC. The MSC is required for programming custom charging setpoints and for logging data. Visit Morningstar’s website for more information. -
Page 8: Installation
3.0 Installation 3.1 General Installation Notes Read through the entire installation section before beginning installation. Be very careful when working with batteries. Wear eye protection. Have fresh water available to wash and clean any contact with battery acid. ... -
Page 9: Adjusting Dip Switches
3.2 Adjusting DIP Switches Battery #1 Type Battery #2 Type Battery Charging Priority Custom Setpoints Regulation Type Figure 2. Setting DIP switch definitions DIP Switches 1 & 2 – Battery Type Select The SunSaver Duo charges both sealed and flooded lead-acid batteries per the charging specifications in table 1 below. - Page 10 DIP Switch 4 – Custom Setpoints If the standard battery type settings are not suitable, custom charging setpoints can be programmed using a PC and a Morningstar Serial to Meterbus adapter (not included). See Morningstar’s website for more information. DIP Switch 4 OFF: Factory settings (factory pre-set)
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Page 11: Mounting
3.3 Mounting NOTE: When mounting the SunSaver Duo, ensure free air flow through the controller heat sink fins. There should be at least 3 inches (75 mm) clearance above and below the controller to allow for cooling. If mounted in an enclosure, ventilation is highly recommended. -
Page 12: Wiring
3.4 Wiring Three system wiring examples are provided for RV’s and caravans, boats, and non- mobile installations. Reference the appropriate wiring diagram for your installation. CAUTION: Protect system wiring from sharp edges and foot traffic. Use grommets and wire loom where necessary. NOTE: Power connection order is not critical. - Page 13 NOTE: A wire jumper is installed across the Remote Temperature Sensor (RTS) terminals at the factory. The jumper can prevent false RTS detection due to condensation on the SunSaver Duo. Do not remove this jumper unless an optional RTS is to be installed. Before proceeding, mount the solar module(s) per the manufacturer’s instructions.
- Page 14 Upon connection of the Solar positive wire, the SunSaver Duo should begin the start-up sequence, flashing the Status LED 3 times. Step 5: Remote Temperature Sensor (optional) An optional Remote Temperature Sensor (purchased separately) measures the temperature directly at the battery for more accurate battery charging. Remove the wire jumper from the RTS terminals before installing the sensor.
- Page 15 BOAT INSTALLATION WARNING: Only ground the DC system to battery negative (one-point ground). Never ground the DC system to the boat bonding system or to any metallic part, fixture, or component on the boat. NOTE: An existing common ground wire may connect the negative battery terminals of two or more on-board batteries.
- Page 16 Step 1: Battery # 1 (“house” battery bank) Wire the negative terminal of the “house” battery to the negative Battery 1 terminal on the SunSaver Duo with black wire as shown in figure 5. Wire the “house” battery positive power cable as shown in figure 5. Wire a DC-rated in-line fuse holder in the cable.
- Page 17 NON-MOBILE / PERMANENT DWELLING INSTALLATION Solar PV Array 30A Fuse 30A Fuse Earth Ground Battery Battery Earth Earth Ground Ground Figure 6. Terrestrial wiring diagram NOTE: Earth grounding is recommended but not required. Grounding helps protect against lightning by providing a direct path to earth. In areas prone to frequent lightning strikes, external lightning arrestors and/or other means of protection may be needed.
- Page 18 Step 4: Solar Connect the solar module(s) output to the Solar input connection of the SunSaver Duo. Multiple 12V nominal modules may be wired together in parallel and wired to the SunSaver Duo with one pair of wires. Use appropriately sized red wire for solar positive and black wire for solar negative.
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Page 19: Operation
4.0 Operation 4.1 LED Indications The Status LED indicates system operational state and any existing error conditions. Table 1 below defines the Status LED indications. Status LED Operating State Off : 5 second heartbeat¹ Night Green : on solid ( 5 second heartbeat² ) Bulk Charging Green : Flashing ³... -
Page 20: Charging Information
4.2 Charging Information The SunSaver Duo is an advanced, fully automatic solar battery charger. No adjustments are required except to select the battery type at installation. Each battery is charged independently. The SunSaver Duo has a 4-stage charging algorithm as shown in figure 7. -
Page 21: Protections
4.3 Protections Over-current – Solar charge current exceeds the current rating of the SunSaver Duo. Automatically reconnects in 30 seconds. CAUTION: A mis-wired connection of a battery to the Solar input when a second battery is already connected to a Battery input may damage the SunSaver Duo. High Temperature –... -
Page 22: Inspection And Maintenance
4.4 Inspection and Maintenance The following inspections and maintenance tasks are recommended at least two times per year for best controller performance. Tighten all terminals. Inspect for loose, broken, or corroded connections. Verify all wire clamps and tie-downs are secure. ... -
Page 23: Troubleshooting
5.0 Troubleshooting 5.1 Error Indications NOTE: If an optional Morningstar Remote Meter is attached to the SunSaver Duo, use the self-diagnostic feature to determine the cause of the error indication. Refer to the Remote Meter Operator’s Manual for more information. - Page 24 age of the batteries. amount of energy drawn out of the battery by system loads. Consult your Morningstar dealer for proper system design. Problem: The solar module(s) are in full sun but the Status LED is off, indicating that the SunSaver Duo is in Night state.
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Page 25: Limited Warranty
The SunSaver Duo charge controller is warranted to be free from defects in material and workmanship for a period of FIVE (5) years from the date of shipment to the original end user. Morningstar will, at its option, repair or replace any such defective products. -
Page 26: Technical Specifications
7.0 Technical Specifications Electrical Nominal system voltage 12 V Max. solar current 25 A Battery voltage range 1 V – 15 V Max. solar voltage 30 V Self-consumption 5.5 mA (night) 10.0 mA (charging) Accuracy Voltage 1.0 % Current... - Page 27 Mechanical Power terminals wire size (max.) Solid #6 AWG / 16 mm Multistrand #6 AWG / 16 mm Fine strand #8 AWG / 10 mm Terminal Diameter 0.210 in / 5.4 mm Power terminals torque (max.) 35 in-lb / 4 Nm ...
- Page 28 11.0 3% Voltage drop, Annealed Copper Wire at 20°C One-way wire distance: Solar ↔ SunSaver Duo or SunSaver Duo ↔ Battery Specifications subject to change without notice. Designed in the U.S.A. Assembled in Taiwan © 2016 Morningstar Corporation MS-001164 v2.1...
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