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The battery banks are completely separate.

I recently purchased a sailboat with an existing solar charging system for the house bank. I am planning to upgrade to a 48v system with new panels but I might try to include some of my existing panels. They are mounted on the roof and would need to be removed to examine the underside but I...

So if the specifications for my motor indicate: current 400Adc maximium input 20.0 kw, will this 100a overkill BMS work? Or is it undersized and would only allow a fraction of the motor capacity to be used? Would I need to wire multiple BMS's in series to reach the proper operating amps?

I have a 400amp Daly nonsmart BMS that I just installed on my 48V 300AH bank. The cells are A rated from Solar Supply House and are showing 52.5 volts at the terminals. I have a Delta-Q 1200 25amp charger. The charger starts up when I plug it in and the charging (lightning bolt) begins flashing...

So I have two banks (each with 16 cells) that i was going to wire in series to make a 48v battery with a single 48V bms. It appears that instead I need to wire 4 cells in series to make a 12v with its own 12v 4s bms, and then series each 12v battery to the other three, which will each have a 12v...

Thanks for the reply. Lots of good info. I watched Will's youtube channel video on how to top balance. In the text portion of the post, Will states "If you have new/high quality cells, and you pull full capacity with normal BMS, no real need to top balance" which is why i skipped this step. I...

I didn't top balance. These were grade A cells from US supplier (recommended by Will) and arrived in mid-November and all measured within 1/100 of a volt using my Blue Sea multimeter. The total voltage is 52.5 volts. I am a newbie and do not know how to measure the charger current but would...

Thanks for the reply. So when you say try charging while bypassing the BMS output, are you saying to disconnect the bms and hook the charger directly to the battery bank?

Hello. Newbie here with limited solar understanding/knowledge who would greatly appreciate ideas with tying new saildrives into my sailboat's existing solar system for the house bank. I bought the boat (catamaran) in June and just re powered with two 20 KW saildrives from Electric yacht. Each...

Thanks FilterGuy for the advice. Another question. I purchased Overkill 100a 16s 48v BMS for each battery bank. Does the BMS amperage need to be sized to the 304ah banks or the motor load (20kw 400aDC)?

https://electricyacht.com/product/quiettorque-20-0sd-saildrive/

I have just purchased an 80amp MPPT 250V Growatt SCC. I plan on purchasing 2 365 Rich Solar 335W panels which I want to use to charge separate 48V 304AH LifePO4 banks for powering electric boat motors (no inverter involved) . Would it be possible (and safe) to use a A/B battery switch to...

Thanks. It is my understanding that I would have to have a SCC capable of running dual battery banks and research on this forum led me to believe that they are hard to find.