question

corne avatar image
corne asked

AC output negative when grid connected

Hi guys

I have two sites with Victron multiplus II inverters.


When the grid is disconnected, the AC output is normal. As soon as the grid is connected the AC output becomes negative.

I completely disconnected all cables on the AC output and to only charge battery from grid and still AC output is negative.

screenshot-2022-07-24-121400.jpg

The inverter was on firmware 492 and updated to 497 and still issue is there.


Can you please help?


screenshot-2022-07-24-120433.jpgscreenshot-2022-07-24-120453.jpg

Multiplus-II
screenshot-2022-07-24-121400.jpg (54.6 KiB)
screenshot-2022-07-24-120453.jpg (26.7 KiB)
screenshot-2022-07-24-120433.jpg (27.2 KiB)
1 comment
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.

wkirby avatar image wkirby ♦♦ commented ·
Very strange indeed.

Maybe a silly question, the grid is connected to AC-IN terminals and not the other AC-OUT terminals, just to clarify.

0 Likes 0 ·
3 Answers
corne avatar image
corne answered ·

Hi guys.


Any feedback?

7 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.

marekp avatar image marekp commented ·

@Corne

The question is, where is the energy coming from to charge the battery with 3476W when AC-in shows 0W.

Disconnect AC-out wires and tell us what happens.

Also make sure that grid is connected to AC-in. (see @WKirby question)

0 Likes 0 ·
Show more comments
Frank avatar image
Frank answered ·

Hi, I have exactly the same problem with a Multiplus !! 48/5000. Have you had feedback from the distributor what the problem was ? Thanks

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.

sloanebiking avatar image
sloanebiking answered ·

There is a headphone type jack on these MP's that may be stuck, plug in a headphone plug into that jack and it may clear this problem, sounds crazy but it fixed a similar problem on mine. There is an article about this issue, I don't remember if it should be powered on or off?

1 comment
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.

ejrossouw avatar image ejrossouw commented ·

@frank @sloanebiking May be applicable, but worth noting newer models no longer have the headphone connector and makes use of a block connector.1703933899934.png

0 Likes 0 ·
1703933899934.png (156.3 KiB)