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I have a question about synchronization of the SOC:
I have recently an new CCGX and connected to the Multiplus with VE bus cable. Also a BlueSolar 150/85 is connected with CANbus cable to the CCGX.
The SOC goes every day a little bit up when the sun shines. After one week the SOC is now till 35%. While the the battery (1000Ah) is in state of absortion or flowting. Is this correct or is there a possibility to synchronize this directly?
It is possibly a seting that is not quite right for you battery type. Absorption and float is usually voltage based (your battery manufacturere will have a datasheet for that info)- Also check your battery capacity setting.
What is measuring the state of charge? The Multi on VE Bus? This can be checked under system setup and battery monitor.
Hi Alexandra, tnx for your answer.
The lead battery is from 2015 and I have also an BMV600 with shunt. On the BMV is the SOC 100%, so this is correct. Maybe I have to change the type of the batterij in the Multi. Type of batterij I choose now is: "Flooded deep discharge flat plate lead antimony". Is this correct or do I have to change this? The BMV is nearby the batterij and the CCGX is 10 meter away in an other room.
I choose also in the CCGX SOC for the Multi, not on automatically or BMV. (there is no connection from the BMV to the CCGX) The connection of the Multi to the CCGX is with VEbus.
@Pretender I have no idea what batteries you have in your set up. Just make sure you have the same settings on your 1.Solar charger, 2.Multi and 3.BMV and that they are what your batteries recommend. Check that the capacity is correctly programmed.. That being said if you have lead acid based system 5 years is quite and age for the bank and you would have lost some capacity.
But if the CCGX and the BMV are not in agreement then you have what is known as State of Charge drift. There is an option to sync the BMV in its settings, use this if you know your batteries are at the correct level and fully charged.
https://www.youtube.com/watch?v=4ReljfO3k6M
https://www.youtube.com/watch?v=yMJ_vzB2avE
Here are two videos for the BMV to review maybe there is some info in there to help you.
As I indicated, the BMV indicates it well. It concerns the new CCGX. Is there also a youtube video of synchronizing with the CCGX? Maybe I just have to be patient because now the CCGX already indicates 50%,
@Pretender no there is no video for that. If your settings in the multi are correct then it is more than likely that your batteries just need a good charge which is what it is trying to do. The Mutli will tell you it is 100% SOC when you batteries stop taking in current for charging. It is possible that the BMV has synchronized the wrong State Of Charge.
I suspect you have the wrong battery setting. Post a picture of the battery model etc if you can. Also, have you configured the correct parameters on the multi?
Hi @Pretender
Why don't u connect the BMV600 to the CCGX and use that for SOC? it is always more accurate.
Hi Daniël,
Thanks for your advise.
That was initially the intention. Turns out the VE direct cable doesn't fit the BMV600. The BMV600 has a different connector. Connecting a different cable is unfortunately not an option because the renovation of my house has been completed. The BMV is nearby the battery and the CCGX is 10 meter away in another room. That is why I want to read the SOC through the Multiplus.
