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Batteries I intended to use is Samsung 30Q Li Ion 18650 batteri. Each battery is 3.7V, capacity of 3Ah and CDR (continuous discharge rates) of 15A. Which gives my 5x 10series enough to power the motor.

Motor input should be 48V and it can deliver 9kW. I do not know. I planned to connect the 5 packs in parallel and charge them all together.

Plan is to charge when in dock. However solar panels are plans for the future ;)

Hi I am to assemble Li Ion battery packs to power my boat motor. I have found batteries (Samsung 30Q, 3000mAh), racks and nickel strips for assemble. However I have difficulties finding a proper BMS system. My plan was to make 5 modules of 12S10P , giving me approx 48V at 30Ah for each module...