Solar Power

The principle of photovoltaic power (converting light into electricity) was discovered in 1836 when it was found that sunlight striking a surface emits electrons. With positive and negative poles a DC current could be obtained. With the development of solar cells and solid state electronics, solar power generators have become reliable alternatives to the power grid. These can be stand-alone systems, such as are currently in use to power entire hospitals in Zaire and remote archeological digs, or they can be portable.