BMV712 temperature sensor and status not working

Question

question

edwin-prasing asked Jan 12, '21

BMV712 temperature sensor and status not working

I got a temperature sensor on my BMV712, but no matter what I try in settings, it shows nothing like it's not connected.

I got another one from the store to see if it maybe broken but that one gave the same result.

Other issue.....after a little while BMV712 shows load drops to 0% in a couple hours after charging, but the 4x 12V220Ah agm's are fully loaded.( New batteries)

Can it be a broken print on the shunt or is the BMV itself broken?

Everything else seems to be working fine...

Multiplus 12/3000/120, 360Wp, Mppt12/24-40

BMV Battery Monitor Temperature Sensor

3

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.

Matthias Lange - DE ♦ commented · Jan 12, 2021 at 03:55 PM

Can you please make some screenshots of your settings and maybe pictures of the wiring?

0 ·

edwin-prasing Matthias Lange - DE ♦ commented · Jan 13, 2021 at 12:59 PM

I think all setting are correct

0 ·

edwin-prasing Matthias Lange - DE ♦ commented · Jan 13, 2021 at 01:08 PM

I put the red on the busbar for all battery positieve wines and tried it on the battery itself but no diference.

0 ·

screenshot-20210113-135118.jpg (305.4 KiB)

screenshot-20210113-135038.jpg (277.1 KiB)

screenshot-20210113-135058.jpg (189.2 KiB)

screenshot-20210113-135106.jpg (273.2 KiB)

screenshot-20210113-135020.jpg (170.6 KiB)

20210113-135328.jpg (3.6 MiB)

20210113-135333.jpg (3.9 MiB)

Modifications Space

Node Red Space

Answer 1 · 2021-02-11T16:27:45Z

marc-de-montreal answered · Feb 11, 2021 at 04:27 PM

hi, with electronics things i always do a test on bench before to fixe it.. now all is fixed but you can to confirm with a cheap digital multimeter (voltage, ohms and continuity check) your setup.. that look a wiring problem or connection missing (if not the shunt or bvm).. if your problems have started with your temp sensor added, go to check it first.. have you only add the temp sensor without to change/move anything other??

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 · 2021-02-11T19:16:38Z

edwin-prasing answered · Feb 11, 2021 at 07:16 PM

Hi Marc,

It's a new install,

Where can I get specs on what it should read with a multimeter?

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.

question