Mornignstar SunSaverDuo Field Testing Instructions

SunSaver Duo Field Test Document
Morningstar Corporation
4 v1.0
** Temperature compensation will skew the Absorption voltage value. In warm temperatures,
the Absorption voltage will decrease. In cold temperatures, the Absorption voltage will
increase.
Step 3
Connect:
- 12V battery to the Battery #2 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 #2 Voltage = Solar input Voltage (if Status LED solid green)
- Voltage across Battery #1 terminals should be less than 0.3 Volts
If the battery has reached full charge, Battery #2 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 #1 terminals exceeds the limit, the SunSaver Duo may have
one or more damaged power transistors. Contact your authorized Morningstar dealer for
service.
** Temperature compensation will skew the Absorption voltage value. In warm temperatures,
the Absorption voltage will decrease. In cold temperatures, the Absorption voltage will
increase.