Proper Setup for BMV-712 on 12 volt RV Solar System

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davgu3 asked Jun 12, '22

Proper Setup for BMV-712 on 12 volt RV Solar System

Hi,

I am by far a solar expert. Someone set it up for us at our trailer. Here is what we have:

- Four 6 volt batteries paired in two to make a 12 volt system. Our Batteries are Crown Deep Cycle CR-430 with an amp rating of 430 Amp Hours. Since they are paired in two we have total amp hours of 860.
- Four 330 watt solar panels.
- Charge controller is Epever (model Tracer 10415AN).
- SolarEngine 3000 watt inverter.

We have had our Victron BMV 712 battery monitor for a couple weeks and it is yet to auto-sync. I am not sure I have set it up correctly. Can anyone give me some advice? I would be grateful. Also, I'm not expert so I sort of need it in plain speak.

Attached are screenshots of our current BMV 712 settings and history taken today. Skies are overcast. No sun in sight. Also attached are pictures of our equipment. Thanks in advance for your help.

BMV Battery Monitor

screenshot-20220612-111320.png (245.3 KiB)

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pxl-20220612-151221712.jpg (1.2 MiB)

pxl-20220612-152612948.jpg (1.6 MiB)

pxl-20220612-152843584.jpg (1.5 MiB)

screenshot-20220612-111340.png (284.1 KiB)

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Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

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Answer 1 · 2022-06-12T18:37:00Z

klim8skeptic answered · Jun 12, 2022 at 06:37 PM

Please have a look at BMV Youtube tutorial.

Take note of the difference in "charged voltage" in PV charged systems.

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Answer 2 · 2022-06-13T05:01:47Z

kevgermany answered · Jun 13, 2022 at 05:01 AM

Couple of points

Where the 4 batteries meet, two cables cross and look like they are in contact. When the insulation wears out you will get a direct short circuit, possible explosion and fire. This must be put right asap.

The second pic shows time since last full charge as 53 minutes. Did you manually synch to 100%?

You also have the manual synch set to 99.4% odd.

Max battery voltage is going over 15V. This is too high.

Your settings for the monitor will probably lead to a false synch to 100% before the battery is fully charged.

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