So, here's the situation; I have four automatics, but I only wear them once every few days. I'd like to buy a winder but the thought of having yet another electrical device with an A/C adapter plugged in all the time and wasting energy just rubs me the wrong way. So, I was wondering if anyone has seen or built a winder that uses solar energy. Do you think it would be possible to wire a solar panel to a conventional winder and throw the whole rig on the window sill for a few hours? I've seen cheap solar panels that can (roughly) put out the 500mA of power that comes out of a USB port, which should be enough to turn a few hundred grams of watch, albeit slowly.
Will a typical low-end winder even turn given a lower voltage than it expects from its adapter