Mornignstar SunSaverDuo Field Testing Instructions

SunSaver Duo Field Test Document
Morningstar Corporation
3 v1.0
Quick Check
Verify correct SunSaver Duo operation by following these few short steps. Disconnect both
batteries and the solar panel(s) from the SunSaver Duo before proceeding.
Tools and components required:
• A solar panel (in full sun)
• One (1) healthy 12V battery, terminal voltage 11 volts or more
• A multi-meter to measure voltage
Step 1
Connect:
- 12V battery to the Battery #1 Input on the SunSaver Duo
Measure:
- Voltage across Solar input terminals
- Voltage across Battery #2 terminals
Expected Results:
- Status LED should flash 3 times on start-up and then remain off (w/ heartbeat)
- Voltage across Solar input terminals should be less than 0.1 Volts
- Voltage across Battery #2 terminals should be less than 0.3 Volts
If the voltage across the Solar or Battery #2 terminals exceeds the limit, the SunSaver Duo
may have one or more damaged power transistors. Contact your authorized Morningstar
dealer for service.
Step 2
Connect:
- 12V battery to the Battery #1 Input on the SunSaver Duo
- Solar panel to the Solar input on the SunSaver Duo
Measure:
- Voltage across Battery #1 terminals
- Voltage across Solar input terminals
- Voltage across Battery #2 terminals
Expected Results:
- Battery #1 Voltage = Solar input Voltage (if Status LED solid green)
- Voltage across Battery #2 terminals should be less than 0.3 Volts
If the battery has reached full charge, Battery #1 voltage will be at 14.1V or 14.4V **
(Absorption voltage), the Status LED will flash green, and the solar input voltage may be
greater than Battery #1 voltage.
If the voltage across the Battery #2 terminals exceeds the limit, the SunSaver Duo may have
one or more damaged power transistors. Contact your authorized Morningstar dealer for
service.