Fig. 5: Supply chain structure of solar photovoltaic panels shipped to the U.S. in 2010, 2015, and 2020. The suppliers involved in the 2010, 2015, and 2020 outsourced cases are determined based on the market share data.

The U.S. mainly imported solar photovoltaic products from Asian trading partners. The market shares of module supplies changed dramatically over the years due to geopolitical tensions, safeguard tariffs, policies, etc. The rest of the world (RoW) includes all other suppliers other than the top six suppliers.