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So this is my layout for the 12V (200amp) 4S battery. Now to search for the appropriate BMS. Because my Zantrex is a 130 amp charger and a 2400W inverter. What amp rating would you suggest from this ebay listing...

Okay so I Have sketched 4 Packs of 4 cells each. Each RED button is the Positive for the cell and the Pack. The individual cells are all connected positive to positive and negative to negative. (When I cut a pasted from PowerPoint the Buss bars disconnected, oops!) I did just like Will said...

So here are images of my GMC project called the "Pearl Princess" As purchased : As gutted, engine rebuilt, House wiring upgraded, repainted and awaiting further LifeP04 battery set, EFI and rebuilt frt and rear suspension. Slo but fulfilling for me:

Gnubie, Et Al......isn't this what Will P Show in his utube? Parallel in cells and then hooking those sets in series to make 12v.

OMG you are correct and well balanced!??

THANK TO ALL OF YOU! HAPPY NEW YEAR!

Hi Folks, my first Post:sneaky: My project is for a vintage GMC Motorhome of the 70's era. The house bank of (LifeP04) Were purchased from Lion Energy and were offered on EBAY for $400each...

I require 12V as the out put from my LifeP04 cells. I can be happy with monitoring just the pared cells rather than individual cells and get on with life, yes? Some have even suggested you don't even need a BMS, but I'm not giving up yet!

It's above my Pay grade. Maybe some can chime in.

Tony I don't understand your replay?

Because they were shipped with the buss bars removed I can only report out is "what you see is what I see"in the Ebay image. Ive done some more searching on WILL P's u tube Postings and arranged the battery packs in parallel pairs. See image attached. That said, how can the BMS (Smart Lifepo4...

Well i just had another brain F--T. If both batteriess were connected in series that means 8 cells, yes? From the Ebay/BMS instructions I selected the cartoon that appears to be the most appropriate called the "8 string" Can any one validate my choice?

So I'm still not understanding. As shown before I have two 4 cell batteries and if I connect them in series I will have an 8 cell package that I want to monitor, yes? The "8 Strings" wiring diagram seems to be appropriate, if not what have I missed? It's the day before Christmas......so...

So, Okay George, I think you're telling me that I screwed up buying the Single BMS With blue tooth and many other Features to monitor a 12V system?

So as to be as clear as possible I am trying to use the 16 (3.4V) batteries and configure them to power 12V items in this small Class A coach. I have already purchased the BMS previously discussed and have the LCD, temp sensors and Bluetooth ready device. How can I rescue my purchases with out...

I don't want to monitor each of the 16 Cells. The way I have them currently configured in the sketch I have 8 cells to monitor, yes ?

OPPS 3.3V Just say'n

Well Isn't this just special! Battery hookup 101 and I'm failing, yes? I believe after all of your special input, I have arrived at my destination.:unsure::unsure: FYI, I am purchasing the largest BMS available (150amp) just for giggles & shits! SAJJEN, The only reason for Bank 2 being...