I would opt for one which can bring break-even faster. As i could see, used panel comes at a great price, you can go for it if you get a chance to inspect it before buying. buying it from places like ebay might not be a good idea though. You should also check out amazon, i found their pricing great recently.
Also used panel should be used only if it is grid tied; if its standalone (off grid), you should be able to get enough power from panel and new one will surely do better
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Solar power is the last energy resource that isn't owned yet - nobody taxes the sun yet ::: Bonnie Raitt
Last edited by Claudio Miller; 03-23-18 at 08:10 PM..
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