VRM total consumption incorrect after adding smart shunt

Question

question

ebringas asked Mar 11, '24

VRM total consumption incorrect after adding smart shunt

Hi,

I have an installation in which the grid input has a ET112 meter set as grid meter (this is because I have n EV charger before the Multiplus II), then A battery with a smart shunt connected to the inverter, a PV inverter on AC out.

This smart shunt was added 2 days ago, since then the total consumption reported in VRM portal is incorrect because it is missing the battery consumption from the grid (I charge the battery during the night)

before the smart shunt, the total consumption (white) and the grid from the meter (red) was the same, thus correct, now the calculation is is leaving out the consumption from the battery (blue), thus being always less that what is actually being consumed from the grid

vrm bug

img-2080.jpeg (280.6 KiB)

2 |3000

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

Modifications Space

Node Red Space

Answer 1 · 2024-03-19T17:51:16Z

ebringas answered · Mar 19 at 05:51 PM

Someone from Victron support staff that can help with this?

2 |3000

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

Answer 2 · 2024-03-19T17:59:32Z

nickdb answered · Mar 19 at 05:59 PM

Battery charging isn’t consumption. Only Ac loads and critical loads add up to that. Seems fine.

Battery usage is recorded as to/from battery.

2

2 |3000

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

ebringas commented · Mar 20 at 04:50 PM

The battery is charging from the grid! So, if you add up the grid reading minus total consumption you end up with missing part of what was consumed from the grid,

It is not consumption if you charge from solar but if the charge is from the grid, then of course it is consumption

Add in to this, before adding the smart shunt, the same battery but managed by the battery bms this was being account for in the total consumption, really what you said doesn’t make much sense in this case.

0 ·

Alexandra ♦ ebringas commented · Mar 20 at 06:11 PM

Power to battery is not consumption (it is storage so not consumed yet) like to load from grid.

Before the system had no way of knowing where all the energy was going. Now it has another measurement.

If you look at the consumption drop down near the bottom the figures will show how energy is used in the system

Grid - loads direct - battery etc.

Then from battery you can also see consumption to loads.

And the same for solar.

PS. The guidlines of the forum state this is not an official ask Victron forum. While they do chip in from time to time here it is driven by volunteers mostly.

0 ·

question