question

elvistherv avatar image
elvistherv asked

SOC Source for Assistants

My (new to me) setup is a 960Ah bank of Lead Acid batteries in an RV, with a Quattro, BMV 712 + 3rd Party MTTP Solar charger and a Cummins LPG (3 wire) generator.

I'm looking at using the 3-wire suggestion using assistants on this page (https://www.victronenergy.com/live/auto-generator-start-stop:start) however I was hoping to use SOC rather than pure battery voltage to avoid false positives if pulling a decent load from the batteries.


However, the assistant only seems to be able to use the SOC from the Quatrro and not the (as I understand it) much more accurate SOC from the BMV 712 (in this config with DC loads, alternators, 3rd party solar chargers).

Is there any way around this or should I be looking at another solution?

MultiPlus Quattro Inverter ChargerBMV Battery MonitorAssistants
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

1 Answer
Guy Stewart (Victron Community Manager) avatar image
Guy Stewart (Victron Community Manager) answered ·

Hi @ElvisTheRV,

Sharing State of Charge with a GX device

This feature of sharing a more accurate state of charge reading back to the multi for use in assistants requires a GX device.

Once all are connected, there is an setting in the System Setup menu:

alt text

Using the BMV directly

It is also possible to use the relay directly on the back of the BMV-712 for an generator start based on it's state of charge (rather than using the Multi), though I have only done that with a 2 wire start, not a 3 wire:

alt text


screen-shot-2019-11-06-at-104907-am.jpg (90.7 KiB)
screen-shot-2019-11-06-at-105912-am.jpg (170.4 KiB)
2 comments
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

elvistherv avatar image elvistherv commented ·

Doh!, I realise I should probably have mentioned I have a Colour Control GX, so does this mean that even though the assistant in VEConfigure says State of Charge (Internal Battery Monitor) it will actually use the SOC set in the Colour Control GX (for some reason the kit I bought didn't include the VE Direct cable to go between the Colour Control GX and the BMV, now ordered).

0 Likes 0 ·
Show more comments