Active solar energy is defined as creating energy with the help of mechanical devices. Passive solar energy does not require the use of mechanical devices and provides you the advantage of getting energy nonstop and in a more cost-effective manner. Passive solar energy is further divided into different categories. The initial setup costs may be very expensive for some individuals. Women may especially find that tasks hard to do unless they rely on a professional to do all the work. Installation will depend on several factors and will need careful study, such as the angle of the sun, the position and area where you need to place the solar panels and the number of hours to complete the project. 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. Some panels are intended for individuals living in places that has minimal sun, while other designs are specifically made to gather the most sun over the shortest span of time. Since solar energy has become more common and more viable in the recent years, developers have begun to develop different solar energy systems that you can choose from, depending on your needs and limitations. Choosing a solar energy system that would fit best for your home is not necessarily an easy thing to do, which is why it is important that you learn how to choose the best one in order to get the right type of solar energy system for your home. You can use this in cabins, archaeological digs, tents and camping trips. This is the ideal setup for people who travel to undeveloped regions and countries. Initial Steps First of all, you need to make or buy yourself a tiny solar panel. You can get a device rated at 12 volts or higher for only $100 at a marine supply store or RV store. The highest efficiency PV cells produced were by Boeing and SpectroLab in 2009, with efficiencies of around 35% to 41%. There are also other multi-layer cells that closely resembled the device. These were very expensive too, and were only used in the most unique applications. Thin film PV cells were also created and made in bulk.