BMV-702 current screen display showing + and -

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Robin asked Feb 3, '19

BMV-702 current screen display showing + and -

Should the bmv 702 display '+' symbol in the current screen when charging?

It also shows a '-' when there is a draw.

bmv

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Answer 1 · 2019-02-03T21:16:42Z

wkirby answered · Feb 03, 2019 at 09:16 PM

It should say - when discharging. It says + when charging.

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Robin commented · Feb 04, 2019 at 08:05 AM

cheers for answer. any idea how to correct this. ive been throw settings and carnt fined any way to correct it?

@WKirby

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WKirby

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wkirby ♦♦ commented · Feb 04, 2019 at 08:42 AM

What I described above is the proper operation, there is nothing to correct. The - sign tells you that energy is coming out of the battery. The + sign tells you that energy is going in to the battery.

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Answer 2 · 2019-02-04T18:21:28Z

Stefanie (Victron Energy Staff) answered · Feb 04, 2019 at 06:21 PM

I've never seen the + symbol with my 702 while charging. And I have two of them :-o

They display - at discharge.

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Answer 3 · 2019-02-04T18:47:53Z

Robin answered · Feb 04, 2019 at 06:47 PM

sorry my question is badly worded. when charging i do not have a positive sign.

is there a way to correct it

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boekel ♦ commented · Feb 04, 2019 at 07:37 PM

yes, sounds like the cables on the shunt are reversed. a trick is to only reverse the circuit board, but then it sticks out a bit, so might not be the best way.

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wkirby ♦♦ boekel ♦ commented · Feb 04, 2019 at 07:48 PM

We have both misunderstood the question. I think the shunt and wiring is fine. They are asking why there is no + sign displayed when charging.

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wkirby ♦♦ commented · Feb 04, 2019 at 07:46 PM

I now think I have quite misunderstood the question. Thank you Stefanie and Robin for clarifying.

I have two BMV's also and I know that my BMV-600 does NOT show a + when charging, only a - when discharging. My BMV-712 I'm not sure, I'll check when I get home.

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Answer 4 · 2019-02-04T20:44:47Z

wkirby answered · Feb 04, 2019 at 08:44 PM

Right, so my original answer above is wrong to an extent. I have double checked with my own devices.
There is a - sign for discharge but there is no + sign for charge. I don't know why I thought there was a + sign, it's something I've never thought about before I guess, it never bothered me.
There is no option to have a + sign for charge either, as far as I can tell.

I'm sorry for misleading.

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Stefanie (Victron Energy Staff) ♦♦ commented · Feb 05, 2019 at 10:46 AM

It was in the old manual. But neither I was bothered as it seemed to be clear to me that no sign means + :

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bildschirmfoto-2019-02-05-um-114105.png (181.7 KiB)

Answer 5 · 2019-02-04T21:07:36Z

Robin answered · Feb 04, 2019 at 09:07 PM

thanks for checking. just wonted to make sure it was ok. the book does say there should be a positive sign when charging but then there are also other misleading stuff in there to. thanks again

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