Folks, As you may recall I have 4 strings of 4 batteries parralleled into a single bank. Each string is 1690Ah @ 48V. The charging system for this bank is undersized. I think I would do better by reducing the bank size by running only 3 strings. However, I don't want to strand the fourth string.
I am wondering what rotating the strings might look like. One string would be removed from the bank for a period of perhaps a month. Then it would go back on-line and onother string would be taken off-line, and so on. Right away I worry about accelerating the divergence of the strings in terms of resistence to charging. Going to three stings would reduce this problem, but trying to rotate strings might make it worse. In any case, I would want to float out the dormant string as best I could while it is off-line. Would it work to attached the DC input of an MX60 to the on-line bank of three strings, and the output to the off-line sting, and let the MX keep the off-line string in float? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com
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