The problem with small solar panels is the markup. E.g. the solarroll 14 mentioned above is > $300 at Amazon. The amorphous-type cells it's made of are cheaper than the crystalline cells in rooftop arrays, which are now available for around $2 US per watt. Yet this product is more than $20/watt I'm waiting for some Chinese ebay seller to realize a profit opportunity and make a killing.