oops . thank you for update. I chose JK because of its active balancing feature . is SEPLOS has this feature too ?
guess what: i had the same thoughts like you 9 months ago and was happy to get the JK canbus from banggood or so till I got the full picture that it is not working that way.
SEPLOS BMS Balancer is there and it seems to be working cause a german youtuber had done some investigations and release a video how it is performing among his 100 kWh big battery . He has added a 15 kWh Seplos powered battery from such kit, you know those whole kits incl .metal case , special bus bars and so on.
One chapter or 2 had been about the topic of balancing and the improvement achieved meanwhile by Seplos cause SEPLOS is the only BMS which firmware can be updated too and that becomes important in such cases of improvements and bug fixing. Big plus over JK.
My cells are currently in the 30 day rest and I will get results from the BMS not before February.
But I can also tell you that there had been some issues described in videos from another german youtuber but he has emigrated to australia and therefore his content is english too therefore check the channel off-grid garage
He is a strong force working with suppliers that had first failed and then over time improved. One example you can check also on his channel is the Neey Balancer. Finally in the 4th edition andy was surprised how good that had become.
Yes, it is a dedicated Balancer of 5A or so and another 100$ but it is my fall back solution if things would go wrong and I would need it. This means all my cells are connected with small wires to a small din rail 1 to 2 connector , which means 1 cable to the cell only and 2 options to connect from that cable to different units like the BMS and a Balancer. This way you can easily exchange one or the other instead of heaving to deal with 32 cables inside the battery box.
BUT: remember that Andy had found the issues of the SEPLOS first as for the Neey active Balancer Version 2 and 3 till he got the 4 working as he had told them. Then Andy added the Neey but only a few times a year so every 2 or 3 months to equalize the cells cause the former SEPLOS had the issue.
Then the SEPLOS firmware arrived and had been checked by the german youtuber who had updated the BMS first and then started his observations of the balancing. He was quite happy and reported about the progress he had found over the issues Andy had faced before in Australia.
Unfortunatelly Andy has not yet gettin back to the old SEPLOS BMS and upgraded and checked the balancer again or I might have missed that. Not sure, but I appreciate both channels cause they follow german precision and love for details so I trust and rely on their experience in my purchase decision. Why ? Cause Andy is riding ahead and willing to support people and community if things do not work out as he had seen.
Off-grid garage offers a ton of content and an awfull lot of experiments, things doing differently and questioning the status quo for example the question of heat along the busbar chain and causes and countermeasures. QUite long videos but you will learn a lot of these cause I had taken a 1 month break to watch all of Andy's videos and achievement like the connection / connector bar between cells and bms / balancer described above.
JK is what it is but I would not believe in their customer support while Seplos support is helpfull as Andy has mentioned in his videos.
If you want a growatt integration of a diy battery then there is currently no way around the SEPLOS aka minerals from AliExpress in my opinion except you wanna buy a ready to use 5 or 10 kWh battery which had been our first choice till we realized that the vendors are lying about the heritage of their cells, the quality, capactiy and what not or / and steadily increasing prices on alibaba cause each day they had found a new fee you should have to pay or if you wanted to order they simply replied: you can not order HomeStorage A anymore cause we now have a new successor called A1 and A1 is 1250$ (which meant just 250$ more even though everything had been the same spec wise except the case).
I will add a link in my next post cause I am not aware about the rules and do not wanna seen this post being deleted for adding a link.
Just 2 minutes and you will find the link.