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  1. S

    Joining 2x 7s21p Batterypacks

    Hey Guys, I have a question (again). I am relatively new to the whole "build your own battery" thing and so far I enjoy it, some sparks, no burns, no fires so far.... I build a 7s21p Batterypack from used 18650cells. I got my BMS to work and with a small 500W inverter I drew 100Watts for...
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    Balancing 300 18650 Batteries :/

    Hey Guys, i am fairly new to the whole spiel and I got (via a friend) 300 18650 Cells, all around 1600-1750 mAh. Now, before building a battery-pack i think it would be best to balance the cells. Does anybody has a viable idea to balance these cells without putting all of them into a charger...
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    Beginners Question

    Hey Guys, Sorry for pestering you with such an easy question, but I am a little los when it comes to "bus bar sizing" Lets imaging i want to use a 24v Battery and a 24v inverter to draw 3600 Watt of power at 220V. When dividing 3600 Watts by 24V I end at 150 Amps. Do I understand correctly...
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