krementz Offline Upload & Sell: Off
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FJ, a word of warning. Most little solar chargers are grossly misrepresented to the amount of power they can produce. Several times when I calculated the power output, I would be much better by bringing many more batteries, or that the solar device would not effectively do anything.
"More batteries" in the sense than a whole lotta batteries would be much less weight, more power, more reliable, and cheaper that a portable solar charger. No point in dragging a 5 lb charger into the woods which won't work on rainy days when 2 pounds of batteries would do the job more reliably.
A nominal 10 watt solar system might put out 5 watts on a very sunny day for six hours, under perfect conditions in the South West in the summer if the charger is always facing south. Consumer-grade chargers are often only 50% efficient. Get away from the solstice, or away from sunless skies energy production will drop a lot - regardless of how hot it is. Of course zero watts are produced on rainy days or when it is in your backpack (hiking).
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