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. At Present Today, Germany has become the primary PV market worldwide after they revised the feed-in tariffs for the Renewable Energy Sources Act. Spain has become the biggest PV market after 2007 after it adopted the same feed-in tariff structure. Spain installed half of the PVs all over the globe, accounting for about 45%. Passive solar energy describes the harnessing of the energy of the sun without the need for mechanical devices. You can use windows that face south to give you natural light and additional heat for the home. There are many solar applications that a homeowner can rely on to get the most benefits out of passive solar energy like passive cooling, passive solar heating and daylighting. When the power enters an inverter, you can get 120 volt AC conversion, the same electricity required to power the house. The connection will be to the utility panel so that appliances and lights will work the same way when the switch is turned on. On Storage If the house is not using a lot of electricity from the solar energy created, the excess energy can be stored in a battery. These known dangers of solar energy may sound very threatening, but these are not the only things that you should be worried about, for solar energy could also have other not so well-known dangers that could pose a risk to your health. Solar Energy Radiation Right now, we are all actually being subjected to the sun s background radiation, which could be dangerous if exposure to it exceeded a certain level. Solar Hot Water Heater One of the more common uses of solar energy is for solar hot water heaters. Most homes in America actually have a hot water heater, which is probably why it accounts for about a quarter of the total energy consumption of a typical American home. Unfortunately, the U.S. government actually spends a lot of money on paying off the energy consumed by these hot water heaters, about $13 billion every year, possibly making it the single biggest energy consumer in your home or work place.