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davgu3 avatar image
davgu3 asked

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.

screenshot-20220612-111320.png


screenshot-20220612-111340.png


pxl-20220612-151214270.jpg


pxl-20220612-151221712.jpg


pxl-20220612-152612948.jpg


pxl-20220612-152843584.jpg

BMV Battery Monitor
screenshot-20220612-111320.png (245.3 KiB)
pxl-20220612-151214270.jpg (1.8 MiB)
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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2 Answers
klim8skeptic avatar image
klim8skeptic answered ·

Please have a look at BMV Youtube tutorial.

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

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kevgermany avatar image
kevgermany answered ·

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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