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Old 03-07-2008
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While not a technical reference, this page pretty well describes the technology used in MPPT charge controllers. Most important part for you is the last graf.

Quote:
Most newer models of MPPT controllers available are microprocessor controlled. They know when to adjust the output that it is being sent to the battery, and they actually shut down for a few microseconds and "look" at the solar panel and battery and make any needed adjustments. Although not really new (the Australian company AERL had some as early as 1985), it has been only recently that electronic microprocessors have become cheap enough to be cost effective in smaller systems (less than 1 KW of panel). New units, such as the Blue Sky "solar boost" series, and the Outback Power MX60 have finally broken the cost/benefit barrier.
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Telstar 28
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
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—Cpt. Mal Reynolds, Serenity (edited)

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