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Old 04-17-2009, 07:11 PM   #21 (permalink)
dcb
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Probably the easiest would be to dissect it and rewire the panels for 48 volts though.

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Old 04-18-2009, 02:40 AM   #22 (permalink)
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One way to make a solar powered desulfator is to use a boost-type circuit without the output capacitor. Use a comparator circuit to activate a one-shot timer every time the input voltage rises above a certain threshold (about 17v for your panel, but tweak for best results). Size the input capacitor large enough to ensure the input voltage only drops a little bit during the on period, use an inductor rated for 20A or so (can salvage one from a PC power supply), and adjust the period such that the peak current is something like 15A. Also use MOSFETs and diodes rated for high voltage (200v minimum) as there will probably be voltage spikes when in operation.

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