Swanson's law

Swanson's law–stating that solar module prices have dropped about 20% for each doubling of installed capacity—defines the "learning rate" of solar photovoltaics.[1][2]

Swanson's law is the observation that the price of solar photovoltaic modules tends to drop 20 percent for every doubling of cumulative shipped volume. At present rates, costs go down 75% about every 10 years.[3]

  1. ^ "Solar (photovoltaic) panel prices vs. cumulative capacity". OurWorldInData.org. 2023. Archived from the original on 29 September 2023. OWID credits source data to: Nemet (2009); Farmer & Lafond (2016); International Renewable Energy Agency (IRENA).
  2. ^ "Swanson's Law and Making US Solar Scale Like Germany". Greentech Media. 2014-11-24.
  3. ^ "Swanson's Law provides green ray of sunshine for PV". 2016-01-17.