US finalises Section 301 tariffs, proposes 50% duty on wafers and polysilicon

Facebook
Twitter
LinkedIn
Reddit
Email
Shipping containers on a boat.
Section 301 tariffs for solar cells, which increase from 25% to 50%, will take effect on 27 September 2024. Image: Rinson Chory, via Unsplash

The Office of the United States Trade Representative (USTR) has proposed increasing tariffs on wafers and polysilicon under Section 301.

Last week, the USTR unveiled modifications concerning tariff actions under Section 301, which includes the increase of solar cells (whether or not assembled into modules) tariffs from 25% to 50% as well as semiconductors and batteries, as covered by our sister-site Energy-storage.news. These increased tariffs were announced last May.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

The tariffs due to be implemented this year, which include solar cells (whether or not assembled into modules), will take effect on 27 September, whereas tariffs for 2025 and 2026, such as lithium-ion non-electrical vehicle batteries, will be enforced on or after January 1 of the corresponding year.

“Increasing the tariffs will allow the burgeoning domestic industry to compete, creating a more resilient domestic supply chain, improving US energy security, and promoting clean energy initiatives,” read the findings.

“Today’s finalized tariff increases will target the harmful policies and practices of the People’s Republic of China that continue to impact American workers and businesses,” said trade representative Katherine Tai. “These actions underscore the Biden-Harris Administration’s commitment to standing up for American workers and businesses in the face of unfair trade practices.”

As the tariffs on solar cells get increased to 50%, the USTR has proposed increasing tariffs on two subheadings, namely 2804.61.00 (for silicon containing by weight not less than 99.99% of silicon) and 3818.00.00 (chemical elements doped for use in electronics, in the form of discs, wafers etc., chemical compounds doped for electronical use).

The proposal for increased tariff rates on wafers and polysilicon is suggested to reach 50%, as they are considered “critical” for manufacturing solar cells and semiconductors. A report from the USTR highlights that China accounts for 93% of polysilicon manufacturing capacity and 95% of wafer capacity.

“China’s dominance in the manufacturing of wafers and polysilicon is likely to undermine new investments in domestic manufacturing, impede the resiliency of U.S. supply chains for solar cells and semiconductors, and undermine the effectiveness of the tariffs on solar cells and semiconductors,” the findings read, which can be accessed here.

Solar manufacturing equipment exclusion

Another update from the USTR since the draft released in May is to temporarily exclude from Section 301 duties on certain solar manufacturing equipment. This would pertain to 19 exclusions regarding solar manufacturing equipment.

Among the 19 exclusions, five were for equipment to manufacture solar modules, six for equipment to manufacture solar cells and the remaining eight for equipment to manufacture PV wafers.

In the end, the USTR has decided to not adopt the five exclusions for equipment to manufacture solar modules, due to sufficient availability of products covered by the exclusions outside of China.

“This is an important step in aligning US industrial policy and the goals of the IRA with US trade policy. Both an increase in tariffs on China’s solar component exports and temporary tariff relief for certain solar equipment will boost US manufacturing and send an important signal to China,” said Mike Carr, executive director of the Solar Energy Manufacturers for America (SEMA) Coalition.

Regarding temporary exclusion of wafers and solar cell manufacturing equipment, the USTR has determined to adopt the 14 exclusions for the manufacturing equipment, due to “limited information regarding the availability and pricing of the cell manufacturing equipment covered by these exclusions outside of China, but some of the risks of granting the exclusions are mitigated by the short prospective duration of the exclusions”.

The exclusion is effective from 1 January 2024 until 31 May 2025.

In the coming days, the USTR aims to release a Federal Register notice announcing procedures for comments on the proposed modifications and information regarding the exclusion process for machinery used in domestic manufacturing, including solar PV manufacturing equipment.

“Dollars saved in retroactive equipment exclusions will help US solar manufacturers confront the challenges of market manipulation from China. US-owned companies were the first movers when it came to building solar manufacturing factories in the US and should be rewarded for taking that first step as we restore the entire supply chain,” added Carr.

13 October 2026
San Francisco Bay Area, USA
PV Tech has been running an annual PV CellTech Conference since 2016. PV CellTech USA, on 13-14 October 2026 is our fourth PV CellTech conference dedicated to solar manufacturing in the USA. From polysilicon, wafers, ingots, cells and modules, to critical component suppliers including glass and frames, the event connects every stage of the value chain under one roof. PV CellTech USA also brings together investors, innovators, manufacturers and industry stakeholders to collaborate and strengthen domestic solar manufacturing across the United States.

Read Next

June 25, 2026
US developers Vesper Energy, rPlus Energies and Matrix Renewables have announced a number of project advancements in the US this week.
June 24, 2026
Comstock Metals in collaboration with JobsOhio and OhioSE will establish an industrial-scale solar panel recycling plant in Cambridge, Ohio.
June 24, 2026
Europe will not be able to produce a “disruption” in the solar manufacturing industry, according to Peter Fath, CEO of RCT Solutions.
June 24, 2026
A new anti-circumvention inquiry request has been filed with the US Department of Commerce against Hanwha and other solar cell producers regarding the import of solar cells from South Korea to the US.
June 23, 2026
German solar PV equipment manufacturer RENA Technologies has signed a supply agreement for solar cell production equipment with Indian manufacturer Emmvee Energy.
June 23, 2026
Sabanci Renewables has signed a PPA with Meta for a portfolio of solar PV projects currently under development in the state of Texas.

Upcoming Events

Solar Media Events
October 13, 2026
San Francisco Bay Area, USA
Solar Media Events
November 3, 2026
Málaga, Spain
Solar Media Events
November 24, 2026
Warsaw, Poland
Solar Media Events
April 20, 2027
Istanbul, Türkiye