I do have bluetooth, but the battery wasn’t charging at the time. It was at 100%
Most of my set ups are set to less than an hour.
The ones that are on two hours are because they are a larger bank and have very slow passive balancing.
Knowing what batteries you have or a (picture of the information plate on) datasheet or manual would help.
2x 25v 280AH LifePO4 batteries in parallel with automatic cell balancing at max 1A. Is that enough info?
All good. If they are new cells properly set up then you shouldn’t need more than 1 hour balancing at most depending on how well matched the cells are. 2 hours if they are second life and you are cycling then quite low.
No cargues la bateria a más de 3,45v por celda y minimo 2,80 y flotacion a 3,40. Pon la absorcion a 0. El lifepo no necesita absorcion. Si quieres que te duren 6000 ciclos tu baterias confia en lo que te digo. Que bms tienes?
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Yla sobretension de celda es porque tienes mal configurado el bms.
As others have mentioned; your absorption time is too long. Should be <2 hours for all the LFP batteries I am aware of. Also, the Float voltage seems a bit high and is very close to the absorption voltage (85mV difference) so they may be processed incorrectly by the CPU. I would expect a Float voltage of 27.0VDC and a Absorption voltage of 28.4VDC or what the battery manufacturer directs.
As others have asked what make and model of batteries do you have?
I set the absorption to 1 hr, which is the shortert. I also installed an assistant and enabled ESS mode (2), which should allow me to disable charging. I will check when the weather is better.
When I set the assistant I had to do some configuration and for the batteries I took the defaults which were indeed a float of 27 and absorption of around 28.4 (don’t remember exactly). Now I get an error that the battery voltage is low (26.22v) with a SoC of 46%. So something is still wrong there.
So there are other mods or interface programs not mentioned?
For the low battery warning there are several settings for those to be triggered.
Not sure what you mean, but before I was running the Multiplus in standard out-of-the-factory mode. I had no ESS assistant installed on it; I simply had it connected to the RaspberryPi GX with an MK3-USB cable.
Now I loaded the ESS Assistant onto the Multiplus and set the ESS Mode to “2” which, according to this documentation, should allow me to manage charging via Node-RED.
For the Low Battery warning I will need to check the battery configuration using the VEConfigure tool, I assume. I probably set the low battery limit too high. As it is now, it is giving a Low Battery warning while the batteries are still reporting 49% capacity.
Edit: I just realized that 2 of my threads are crossing each other. The ESS Mode 2 is another issue I am having discussed in this thread.
AKA. modifyig behaviour.
Agreed.
Thanks for the help everyone. I believe the problem was with the external grid clamp that probably gave some weird reading that confused the multiplus. I have removed the clamp a few days ago and had no similar issues. I will close the thread for now.