Solar systems are made up of solar panels (a mounting system and an inverter with computerized controller). Solar panels produce DC electricity from sunlight after which the inverter converts the generated electricity into AC. This way the energy can be used in households. The computerized controller manages the solar system and ensures optimal performance. You need a battery for the backup system or the off-the-grid solar system. The solar panels are installed mainly on the roofs, where there is access to the sun;however, it is not necessary and those can be installed also on the ground if there is nothing constraining their access to the sun. The inverters can be installed near the panel and both inside your house and outside.