If you are looking at 150A continuous discharge, a battery bank size of > 300Ah seems like a reasonable size (this would keep you below a 0.5C rate) Most cells are good to 1C continuous (which means 1A of current per 1Ah of capacity), but happiest below 0.5C or ideally around 0.2C.@Dzl
In regards to what you were say about price point per ah/$, if unlike most everyone as you mentioned I am not fully concerned about the price per cell relative to alibaba that is, what lifepo4 cell would you recommend for a needed 200ah-300ah capacity at 48v with a minimum continuous discharge rating of 150amps or more?
My perspective--and I am far from an expert--is (regardless of manufacturer), if you want to prioritize quality, reliability of information, and matching over cost, your best bet is to either buy from the manufacturer directly where practical (not: not all manufacturers sell retail, and those that do often have minimum order quantities, or less consumer friendly shipping terms) or source through authorized sales channels with good reputations (CALB and Winston use this model).
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