Hey here is the little 3 months update.
3 months have passed, my system works like a clockwork, each cell is within 0.001v.
Every day in winter I used ~80% SOC or 13 kwh energy out of 16. Now, in ~3 months I used like 54 full cycles.
In total I discharged my battery 860 kWh
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Today I installed little Noctua Fan to keep my system cool and ready for the Summer
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Temperature dropped 10C immediately. I fine tuned my Noctua that it's silent, I installed Industrial 3000 RPM Noctua and tuned to 1100 RPM so I can't hear it. Even on those speeds it keeps -10C from DC temperature.
I use my server PC to power fan and set the speed for ventilator.
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Also installed Polycarbonate cover to battery so it looks cool now.