During the early days, solar power was used mainly to produce steam for drive machinery. Henri Becquerel discovered the photovoltaic effect that allowed the conversion of solar electric energy. Becquerel's discovery triggered the invention of the first true solar cell by Charles Fritts in 1893, which was created by coating selenium sheets with a thin gold layer. You should consider the things you need to power, your location, budget, etc. Here are some more details about the energy. On Availability The good thing about solar energy is that it can be used anytime or as long as the sun exists. You can get the power you need day in and day out. Solar power is a renewable resource which means that you do not have to pay any bill or keep replacing parts to get the results that you need. How much sunlight do you get per day? Some locations are very ideal for installing solar cell panels, while other people may do better with an electrical or battery source. Places that get around 4 to 6 hours of sunlight per day at least can do well with a solar energy system. Preferably, tropical and desert areas should start investing in a solar energy system to get the most benefits. As soon as the solar panels are activated, these will absorb the rays of the sun. The panels are made of semi-conductors like silicone. Electrons are then released from the atoms to produce electricity. The photovoltaic effect is achieved when light is converted into electricity. You can then have direct current electricity. PV or photovoltaic cells change the energy of the sun straight into electrical energy. Solar cars are not used as day-to-day transportation devices currently. These are still used in engineering trials and demonstration practices, usually sponsored by private or government agenices. Solar cars mix the technology in bicycle, aerospace, automotive and alternative energy industries. The batteries will not gas out this way and battery longevity is enhanced. Grid-Tie Solar System The grid-tie solar system is very useful for homes that are already linked to the utility grid. The primary advantage of this kind of system is the cheap price of utility. The system needs to be wired with an inverter that creates pure-sine-wave AC electricity, which is needed for linking to the utility grid.