Programmable Relay - Victron energy SmartSolar MPPT RS 450 100 Manual

3.10.3. Programmable relay

A programmable relay switch is available on some SmartSolar models. The datasheet for your model will tell you whether or not it
is available.
The relay offers three connections:
1. NO (Normally Open)
2. C (Common)
3. NC (Normally Closed)
Relay state Connection between
Switched ON C and NO
Switched OFF C and NC
The conditions for switching the relay depend on the relay mode setting, note that the conditions for switching over must be
present for at least 10 seconds before the relay will change position.
Relay mode
1. Relay always off. This option switches the relay OFF. It will disable the other relay options. Use this option if you do not plan
to use the relay function.
2. Panel voltage high. This option switches the relay ON when the panel voltage becomes too high. See Panel voltage high
mode settings below.
3. High temperature (Dimming). This option switches the relay ON when the charger output current is reduced due to high
temperatures. Use this option to for example switch an external fan.
4. Battery voltage Low. This option switches the relay in ON when the battery voltage falls too low, see Battery voltage Low
settings below. This is the default setting when the relay function is active.
5. Equalization active. This option switches the relay ON when the manual equalization mode is active.
6. Error state. This option switches the relay ON when there is an error.
7. Defrost option (Temp < -20 °C). This option switches the relay ON when the Charger temperature falls below -20 degrees
Centigrade.
8. Battery voltage high. This option switches the relay ON when the battery voltage is too high, see Battery voltage High
settings below.
9. Float or Storage state. This option switches the relay ON when the charger is in the float state.
10. Day detection (Panels irradiated). This option switches the relay ON whilst the solar panels are providing energy (Day/Night
detection).
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Isolated SmartSolar MPPT RS
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