I finally stopped playing around with all the parts (monitoring setup above) and wrapped up the 6V 3.7W panel, Minty, and solar lipo charger in a nice fluorescent blue acrylic housing. Along with a 6600 mAh battery, I can now charge the heck out of USB powered gadgets. See http://www.ransomhall.com/Pages/solbooster.aspx for more details of this build. I am going to create an Instructable for this and enter it in the Epilog laser cutter contest. I’ll post links when that is ready.
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