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Thanks for the reply, i can only find verry big and heavy mppts. Do they not take more power then the motor itself?

Hi All, Iam a bit of a noob with electronics bit i hope there is someone that could help. I have curtains on 5m height. They will move by a tube engine (12v). The engine is powered by a 12v li-ion 2550mAh. Everything Is behind hr++ glass. Now the problem is that i have to charge the battery...