Why the readings no my BMV-17 doesn't match the readings on my multiplus? The BMV reads 100% battery charge and the multiplus 95%.
asked
Why do MultiPlus and BMV show different states of charge for battery
Each of those has its own battery SOC estimator, and each can be configured independently as well. You need to set them up with config values so that they give you good results.
The hardware in the BMV is better at calculating SOC more precisely, so you should plan on using it primarily.
If you have a network with both devices and a Venus device managing it, you can configure the SOC coming from the BMV to "override" the one in the Multiplus, effectively replacing/ignoring it. Then both devices will use the SOC from the more accurate device.
Where can I change this SOC estimator so that BMV 712 calculates the SOC for my Multipluss 12/3000/120 ?
I, too, am curious about where in the Venus/CCGX this setting can be found.
Venus:
-settings
-system setup
-battery monitor
The Multi's SOC will then be synchronized with the chosen battery monitor. So any settings / assistants that use SOC as an input will also use this SOC.
This should be working as soon as there is a BMV / SmartShunt and a VE.Bus Multi / Quattro / Phoenix in the system and the settings have been done, correct?
We have the issue that the shutdown based on SOC is not working even though all of that is done. The synchronization of SOC works in all scenarios, no ESS or similar is needed, correct?
@Daniël Boekel (Victron Energy Staff) Is it possible to do the same using BMV-712 smart and Ve.Bus to BT on Multi, without VENUS device?
Sorry @petarMaksimovic, this is not yet possible.
Aside from the ability to choose which battery monitor in CCGX or Venus, the Multi would not know the DC consumer draw from various DC powered devices, but the BMV would due to the shunt/battery configuration. If that is the case - that there is a DC system, then there would be a Multic SOC to BMV SOC difference.
