photovoltaic cells
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Solar panels are fast becoming a mainstream and viable option. Solar panels from top manufacturers include BP, GE, Solar World, Sharp, and other leading companies. The challenge for future scientists will be to create more efficient solar panels are small enough for practical applications and powerful enough to create excess energy for times when sunlight is not available. Solar thermal keeps your hot water tank topped with hot water only. Solar panels should generally face South in the Northern Hemisphere and North in the Southern Hemisphere. The angle of a solar panel should be set to the equivalent of your latitude plus 15 degrees during winter, or minus 15 degrees in summer.
