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benji avatar image
benji asked

Problems with the battery display

Although 100% of the battery on the display of my CCGX appears, only 5 watts are charged into the battery (see picture below). On the other hand, the view on the CCGX indicates that far more watts are being fed by the photovoltaic system. Of the two feeds on MPPT 150/35 and MPPT 100/15 come 92 and 70 watts. So I think that more than 5 watts should actually be fed into the battery. My question therefore: Are any other settings to be made somewhere? If I do the transmission of data to the CCGX via the BMV 702, then I have 100% on the battery indicator, but only a charge of 5 watts. If I connect the CCGX directly through the inverter (Multiplus 24/3000 / 70-16), then the charge is at 162 watts, but the battery gauge is at 0%. Therefore again the question: Is here something to change in the attitudes or with the connections? Or can you tell me how I connect the individual parts CCGX, BMV 702, MPPT 150/35, MPPT 100/15 and MultiPlus 24/3000 / 70-16 with my LiFePO4 two pieces 160 Ah?

battery charging
2 |3000
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2 Answers
Justin Cook avatar image
Justin Cook answered ·

@Benji, I'm more curious about pictures of the wiring; I see what you're saying about the display on the CCGX, but my suspicion is still that one or more of your chargers/loads are bypassing the BMV shunt, in which case the shunt isn't being able to accurately measure the current in/out of your battery bank and would be giving you false readings. When you have time, please post a photo of your shunt and the wiring to/from it so that we can examine that as a possible solution. Thanks!

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Justin Cook avatar image
Justin Cook answered ·

I suspect that the BMV shunt is incorrectly wired; usually when I see issues like this it's because one or more of the charging sources are bypassing the shunt. If you can, please post pictures of the setup so that we can have a look at everything and see if any issues are immediately evident.

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benji avatar image benji commented ·

Sorry it is not possible to sent you a Picture. Can i send you Pictures in an other way?

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JohnC avatar image JohnC ♦ benji commented ·

It's temporarily down Benji. Maybe try later. https://community.victronenergy.com/articles/27689/image-uploads-temporarily-disabled.html

Or you could upload an image to some breed of 'dropbox' and post a link to it.

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benji avatar image benji JohnC ♦ commented ·

https://www.file-upload.net/download-13703110/3017-42b24115-5132-4285-bc3e-095a64ce1c29.bmp.html

https://www.file-upload.net/download-13703107/2982-1557498080981.png.html

https://www.file-upload.net/download-13703108/3057-daten-ccgx-watt.bmp.html


Can you see now the pictures? Or need you other pictures?

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benji avatar image benji JohnC ♦ commented ·

The pictures:

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display.jpg (97.9 KiB)
daten-ccgx-watt.jpg (169.7 KiB)
ccgx-fluss.jpg (165.3 KiB)
benji avatar image benji JohnC ♦ commented ·

Do you have got the pictures?

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benji avatar image benji commented ·

The pictures:


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2982-1557498080981.png (209.2 KiB)
daten-ccgx-watt.jpg (169.7 KiB)
display.jpg (97.9 KiB)