Solar (photovoltaic) panel prices vs. cumulative capacity

This data is expressed in US dollars per Watt, adjusted for inflation. Cumulative installed solar capacity is measured in megawatts. This represents the 'learning curve'for solar panels.

Source: Nemet (2009); Farmer & Lafond (2016); International Renewable Energy Agency (IRENA)

Note: Data is expressed in constant 2021 US$ per Watt.