The main idea behind passive cooling is to reduce the impact of the sun by orienting the landscape and the house so that you get the most benefits out of cool breezes. The home also has to be designed to reduce barriers to air paths through the home to let natural ventilation in. You need to use the right type and size of windows to reduce the heat during extra hot days. Cheap and Easy People do not have to keep maintaining solar cells, because a panel can last about 30 years or more if well kept. Solar cells can also be made from very cheap materials. You can even construct the panels yourself. You can purchase ready-to-build solar cell panels over the internet. The materials will be delivered right to your doorstep in just a matter of days. It is also important that you understand how the panels work and where you can apply these so that you can get the most benefits. Here are some more details and info about the material. What are Solar Panels? Solar energy starts with the sun. Solar panels are also known as photovoltaics and are primarily used to convert light from the sun. Horizontal arrays can be installed in the form of a free canopy. Vertical arrays can be in the form of integrated sails or free standing to get the wind energy. Adjustable solar arrays can be tilted around the travel axis to boost power when the sun is low and to the side. Integrated arrays cover the whole surface of the car with solar cells. Orbital solar power collection also avoids the intermittent use, although satellite launching and beaming of the gathered power are required to get antennas on Earth. The enhanced intensity of the sunlight over the atmosphere also tends to boost the generation efficiency. About Solar Energy Solar energy, heat and radiant light that emanates from the sun have been controlled by humans beginning the ancient periods using a wide range of evolving technologies. The heat energy is moved to a fluid, air or water that will flow through the collector. This will ensure if the system is air-based or liquid-based. Solar energy storage can be done using thermal mass or water tanks for liquid based systems. Air-based systems will have to rely on rock bins to contain the heated air.