The average size of a residential photovoltaic system in Oregon is 3 kilowatts (kW).  A south facing 3 kW system with no shading can produce about 4,000 kilowatt-hours of electricity per year in Medford.  This represents approximately 1/3 of a typical household's annual energy use.  The more energy efficient your home, the higher portion of your electricity can be met with solar.  Learn more about PV systems...