Slowly scrub the copper using your hands under running water to eliminate majority of the easily removed parts of the oxidized coating. Do not attempt to take off all the coating or scrub vigorously. The objective is to remove the regions that can easily be taken off. Do not damage the copper that stays below the oxidized layer. You should also read about the background of the company and what their objectives are in making these pieces. You should read more about installation to check if you want to install or build the panels yourself or hire a professional. There are several web sites, online forums and internet stores where you can learn more about the available models and how these can best suit your location. Concentrating photovoltaics are very new, which employ sunlight concentrated onto photovoltaic surfaces for electrical power production. Solar concentrators of different varieties can be used. These are usually mounted on a solar tracker to keep the focal point on the cell as the sun travels over the sky. However, there are certain things and aspects about solar energy that should be discussed with people, especially since solar energy is now being integrated in constructing modern day houses and structures, and are even now becoming a viable source for power and electricity. One of those things that should be discussed involves the risk of using solar energy. Use a thick black layer of oxides and allow to form at the surface of the copper. Be sure that you do not leave the copper unattended while you are cooking. The oxide layer and the copper below it will cool at various speeds, leading the two to separate. The process can be violent and can lead to accidents if not properly done. You can create a tiny solar power generator with a budget of only $200 to $300. This is ideal for power failures and life outside the power grid. The setup can also effectively power the modem, television, DC appliances, computer, cameras and lights. You can use this in cabins, archaeological digs, tents and camping trips.