Is there a way to turn the whole electrical system on/off from the Odyssey monitor?

Yes. The Odyssey system includes the ECO Mode feature, which powers off all caravan loads connected to the BatteryPlus35 load terminal block except for terminal 1.

Battery charging is not affected by ECO Mode. Monitoring of battery usage is still available from the OdysseyControl.

As the caravan loads are no longer powered, ECO Mode is a convenient way to save remaining power of your battery if you are on the road and have limited ability to charge the battery.

When charging, ECO Mode ensures that all available charging current is dedicated to charging your battery.

If you need a complete 12V shutdown, flick the remote switch (RSW) on the BatteryPlus35.