question

rns avatar image
rns asked

low battery flashes red on multiplus but battery voltage is 53v

low battery flashes red on multiplus but battery voltage is 53v

I started changing my multiplus from off grid situation to on-grid. I configured the country code and added the ess assistant including pv on ac out.

The ac in is not connected yet.

After uploading the settings the low battery flashes red even that the battery voltage is 53v.

The multiplus also doesn't start charging with the power of the PV on ac out 1 (clould be the power production is too low at this point : 40w but no loads so was expecting some minimum charging)

Multiplus-II
4 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.

Matthias Lange - DE avatar image Matthias Lange - DE ♦ commented ·
What Battery?

VE.Config settings?


0 Likes 0 ·
rns avatar image rns Matthias Lange - DE ♦ commented ·
LiFePO4 without bms connection

What VE Config settings do you need ?

0 Likes 0 ·
Alexandra avatar image Alexandra ♦ rns commented ·
@rns

The ess assistant and the inverter tab.

0 Likes 0 ·
rns avatar image rns Alexandra ♦ commented ·

Made some screenshots

1667337741759.png

1667337764077.png

1667337775666.png

1667337787676.png

1667337801689.png

1667337813115.png

1667337824916.png

1667337836463.png


0 Likes 0 ·
1667337741759.png (27.6 KiB)
1667337764077.png (3.1 KiB)
1667337775666.png (791 B)
1667337787676.png (688 B)
1667337801689.png (1.9 KiB)
1667337813115.png (1.3 KiB)
1667337824916.png (2.5 KiB)
1667337836463.png (2.7 KiB)
4 Answers
maha avatar image
maha answered ·

Your problem is this:

1667408038431.png

That is why you get the alarm message (52V + 1,2V = 53,2V, when lower then alarm).
Set all(!) values to i.e.49V ...


1667408038431.png (5.9 KiB)
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.

ponzoa avatar image
ponzoa answered ·

Your problem is here https://community.victronenergy.com/storage/attachments/42425-1667337801689.png

The make and model of the battery will define what values need to go in there. Pylontech has all set to 46V for example. Other brands have different values

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.

rns avatar image
rns answered ·

I don't understand this. My voltage is at this moment 53.1V and my discharge current is 0.3a.The highest voltage on this setting is 52V but my battery doesn't dip that low even with higher loads.

Today the blinking low voltage dissapeared when the inverter was charging the battery with the power of the pv inverters on ac1 out. Now that the charging stopped the blinking started again.

The battery voltage never dropped below 52.8v

1667407197183.png



1667407197183.png (15.1 KiB)
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.

rns avatar image
rns answered ·

Ok got it, thanks a lot.


If it is indeed a cutoff voltage I would expect the inverter to stop inverting. Since it has no ac in it should just fall out but it keeps working.


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.