Help to reduce standby current in a caravan installation in storage

DIY
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1

My Victron system in the caravan consists of 2 x 200Ah Li Batteries, a VE Bus BMS V2, Smart Shunt, Orion XS, MPPT 100/50, MPPT 100/20 and two battery protects. When added these have a standby current draw of 60mA. Additionally, I have a Multiplus 12/2000/80 which is switched off and a Cerbo GX and Touch 50, both with an unknow current draw.

When in storage, with no Solar, DC-DC or AC input, and the touch screen in standby, Victron Connect shows 13.1V x 0.4A = 5.3W draw. However, a test over 18 days gave a 23% SOC loss or 6.0Ah/day, 0.25A current draw. So, for my 400Ah system it would take about 33 day to reach 50% SOC.

The question is can this be reduced? And if everything else draws 60mA, does the Cerbo GX & Touch draw 250-60=190mA?

I do have an isolation switch that cuts power to everything except the BMS and the Shunt. However, as recommended, the Cerbo GX is powered from the BMS, and the Touch from the Cerbo GX, so they would be on too. Are there any advantages/ disadvantages in reconfiguring this wiring and using the isolation switch to reduce standby current? If so, I would consider cutting power to the BMS and leaving the Shunt on. Then I can still monitor status with Victron Connect.

Your thoughts would be greatly appreciated.

2

5W for the Cerbo and screen is about right, if you leave those on you need to leave your solar running if you do not want to drain your batteries. Otherwise, put an isolation switch in. I leave my boats solar running to offset the Cerbo and router.

3

Thank you. I will rejig my Isolator to disconnect the Cerbo. The caravan when in storage is in a shed, no solar.

4

I have just been doing a little more research. What do you use the VE Bus BMS V2 Remote Switch for? I believe I can use this to switch off the BMS and Cerbo when in Storage mode.

5

Reading the manual you are correct. The technical specs say the current draw is 1.5mA, so 1Ah over a month, pretty small.