3 Batteries in parallel. Lots to learn from an unfinished product 😒

I thought this will be a great relaxing video, where I show you how three SEPLOS Polo batteries in parallel charge and discharge. Instead, I found a lot of quirks which don't work well. The further I kept testing the more I found and the more frustrating these batteries got. It really feels like a bad designed BMS with so many unfinished features and functions. I don't even thing, this can be fixed with a new firmware update. The software running on these V3.0 BMS is just so bad...

- All three delivered battery packs were totally unbalanced
- Cell Overvoltage Protections occurs even under 55V pack voltage
- The current Limiter prevents solar from powering the load
- Passive balancer on the BMS does not seem to work
- BMS refuses to discharge when battery is full

Overall, this is the most frustrating battery and BMS I have tested so far.

At least we could still learn from the parallel battery packs and how they work together with very different SOC.

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