Portland is a great fit for solar power, even though it may not have the sunniest reputation, because the area receives enough consistent sunlight throughout the year to support efficient solar energy production. With an annual average of 4 peak sun hours per day, based on regional solar modeling conducted by the National Renewable Energy Laboratory,1 Portland has the potential to provide meaningful energy production through solar power. Additionally, modern solar panels are even designed to perform well in diffuse light, ensuring Portland can be a strong candidate for residential solar.
System performance depends on several factors, including shading, weather, and system design.