Rooftop

Sun is the source of light and heat without which earth will just be a rock of ice without life.  The energy that earth receives from the sun each hour is sufficient to meet the world’s energy usage for an entire year.  Solar power, which is the generation of electricity from sunlight, is thus a renewable energy.  
A solar power system is an electricity generation plant comprising Solar Photovoltaic panels which convert sunlight into variable Direct Current, Power Conditioning Unit, a.k.a. inverter and balance of system.  
PCU is the important component of the solar power system as they perform the decision making and control functions.  PCU converts variable DC power into grid matching Alternate Current and is also responsible for the safety of the entire system. 
As the PCU performs the main functions, a PCU manufacturer is best suited to design a solar power system.