2 cents from the peanut gallery.....
Something that I have not seen a mention of, though honestly, I did not read every post, is the losses due to the added weight of your system. 60#/battery*# of batteries in bank= increased load and loss of benefit overall.
And then there is the added cost of the batteries to begin with, which at approx $120 each for a decent battery*10 batteries in the bank= $1,200= violation of your low cost parameter.
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