question

cl1981 avatar image
cl1981 asked

Possible to set Multiplus to only use grid power when battery/solar runs out?

Hi I have the following system in my RV:

Multiplus 12/3000/120-50 120V

SmartShunt 500A/50mV

SmartSolar MPPT 100/50

Cerbo GX

700W solar

400ah Lithium batteries

I am in a seasonal park and I pay extra for hydro. I would love to run the RV every day off of Solar/Lithium as much as possible but have the Multiplus automatically switch over to grid power/charger mode once the solar is low and the batteries are low SoC.

I figure I can do this manually by switching the Multiplus to “Invert only” mode and then back to “ON (inverter charger)” mode but it would be awesome if the system could do this automatically.


Thanks!

MultiPlus Quattro Inverter Charger
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2 Answers
snoobler avatar image
snoobler answered ·

Using virtual switch:

https://community.victronenergy.com/storage/attachments/3299-virtual-switch-ignore-ac-lesson.pdf

Easy to do based simply on voltage.


If you want more advanced control, you can also use an ignore AC input assistant:

https://www.victronenergy.com/live/assistants:start

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sujen44 avatar image
sujen44 answered ·

Okay. Thank you for sharing the information.
The virtual switch enables to cut off the Grid according to the battery voltage. The issue I am facing with my site is that when I set the AC ignore and don't ignore AC with battery udc higher and lower similar, the relay connects and disconnects. When the values are put far apart the battery gets drained.
Hence, I want to know if there is a settings in VE.config without using any assistants for mix of Grid and Solar energy to the load and let the battery join in during grid outages only.
Best regards,

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