The electrical energy supplied from photovoltaic panels is one of the most "clean" energies, because it does not cause any negative impact on the environment. With the development of the new technologies in materials science, were made photovoltaic panels (polycrystalline) with high functioning efficiencies that can provide the necessary energy for a house. Development of microelectronics equipment has led to robust and high efficiency operation. In this book we designed and built a converter + inverter and a charging regulator that supplies but also charges the accumulators battery for a consumer that operates autonomously (e.g. a chalet) power from the solar panels.