2c it seems that the low voltage used in the application is being mistaken for low energy. Your garden variety alkaline manganese cell has such a low internal resistance that it behaves as a little bomb when shorted. Same with lithium battery technology. If the solar cell can put out 10W it matters not at what voltage the current flows. From a destructive viewpoint 10W of energy in the wrong place (your car glovebox, a purse......) can be the triggering event for significant damage.
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