For those hard-core devotees to energy-independent living, solar panels are the ultimate green tools. Solar panels use the sun as their sustainable, renewable energy source, and that energy is about as clean and green as it gets.
Solar panels are not just for whole-home applications anymore. They're also used to power lights and to heat the water in hot tubs and swimming pools. Some companies are developing ways of recharging your green tools with green solar panels, and as the technology evolves, solar power may allow you to charge your green tools in only a minute [source: Sandru] If you're handy with rewiring, you can even find ways to create your own solar-powered hand tools [source: Lucas].