SmartShunt current fw bug in midpoint voltage Calc?

Question

replit

This site is now in read-only archive mode. Please move all discussion, and create a new account at the new Victron Community site.

question

torvalstrom asked Jul 24, '23

Hi all!

I have two lifepo4 batteries connected in parallel and measuring manually with a multimeter they are within 0.00v and 0.01v of each other.

If I configure the smartshunt aux port as a starter battery, this is indeed what is reported in the victron smart connect app.

If I configure the aux port as midpoint the app reports a deviation of 99.90% (the opposite of the correct number?)

Am I doing something wrong or does the current firmware have a bug?

Attaching screenshots.

Kind regards from Denmark

Tor

SmartShunt bug report

screenshot-20230724-103246.jpg (272.0 KiB)

screenshot-20230724-103232.jpg (317.0 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.

klim8skeptic answered · Aug 03, 2023 at 08:45 AM

@torvalstrom I have two lifepo4 batteries connected in parallel

The midpoint monitoring is for batteries in series.

With midpoint monitoring, it is expected the the mid point voltage would be half of the bank voltage. Hence the reported 99.9% deviation figure.

batt-bank.png (178.1 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.

Answer 1 · 2023-08-03T08:03:33Z

torvalstrom answered · Aug 03, 2023 at 08:03 AM

Trying to tag @Stefanie (Victron Energy Staff) and see if it works :-)

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 · 2023-08-03T09:07:57Z

torvalstrom answered · Aug 03, 2023 at 09:07 AM

Excellent explanation! Thank you so much!

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.