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/daily ·17 OCT 2026 ·SATURDAY ·2 MIN READ ·5 STORIES

Technology War Saturday

China moved to ban exports of perovskite and tandem solar manufacturing technology. The US trade commission found injury from Asian solar imports. And Qcells decided to build the factory that would let America make the next generation anyway.

01 / The Day

SATURDAY 17 OCT 2026, ranked

05

China Proposes Export Ban on Perovskite and Tandem Solar Manufacturing Technology

China's Ministry of Commerce proposed adding 12 next-generation photovoltaic manufacturing processes to its export prohibition catalogue, including perovskite-tandem production methods and advanced polysilicon, wafer, and cell know-how — the processes that produce the most efficient solar cells currently under development anywhere.

  • The ban covers manufacturing processes and knowledge transfer, not just finished products — targeting technology diffusion to foreign competitors
  • China announced 23 AI technology export controls on the same day, indicating a coordinated technology sovereignty strategy across multiple sectors
  • Public consultation runs until November 15; if finalized, the ban would lock up the dominant production pathway for the next generation of solar
Why it mattersControlling the manufacturing process for next-generation solar is more durable than tariffs: you can circumvent tariffs by moving a factory, you cannot circumvent a process-knowledge ban without years of independent R&D.
01 pv-magazine.com↗

Qcells Plans First Large-Scale Factory for Next-Generation Tandem Solar in the US

Hanwha Qcells announced plans for a US facility that would be the world's first large-scale factory producing tandem solar cells — the same technology China is moving to restrict for export, and the next efficiency frontier for the photovoltaic industry.

  • Tandem cells stack two absorber layers to capture more of the solar spectrum, achieving efficiencies well above the roughly 22% ceiling of conventional silicon cells
  • Qcells is positioning the US facility to operate on domestically sourced knowledge, reducing exposure to any Chinese process export restrictions
  • The IRA advanced manufacturing credits make US-based production of cutting-edge solar economically competitive for the first time
Why it mattersThe race to own next-generation solar manufacturing has a US competitor — and the timing, relative to China's export ban proposal, is not a coincidence.
02 canarymedia.com↗

US Trade Commission Finds Solar Imports from India, Indonesia, and Laos Are Harming Domestic Industry

The US International Trade Commission issued a final affirmative injury determination in the Solar IV trade case, finding that solar cells and modules from India, Indonesia, and Laos materially harm domestic producers. Antidumping and countervailing duty orders are expected from the Department of Commerce in early November.

  • Solar IV covers the latest wave of import sourcing, after Chinese manufacturers shifted production to Southeast Asia to avoid earlier tariff rounds
  • Duty orders in November would raise costs for US solar developers currently relying on third-country module supply chains
  • The ruling reinforces the case for domestic US solar manufacturing at scale, as each tariff cycle closes another offshore sourcing option
Why it mattersEvery time the US closes a tariff gap, manufacturers find a new sourcing country; the Solar IV ruling suggests the ITC is now attempting to close the entire non-domestic pathway at once.
03 pv-magazine.com↗

Australia Sets Annual Record for Large-Scale Solar Investment Decisions at 3.5 GW

Australia's Clean Energy Regulator reported that large-scale solar projects reached 3.5 gigawatts of final investment decisions in 2026 — a new annual record — alongside strong growth in rooftop solar and home battery installations under the Cheaper Home Batteries Program.

  • Final investment decisions represent committed capital, not just announced projects — a stronger indicator of actual build pipeline
  • Home battery installations also accelerated, consistent with Australia's position as the most per-capita solar-dense country in the world
  • The record comes as grid-scale storage investment in Australia is also running at multi-year highs
Why it mattersAustralia is the clearest real-world demonstration that distributed solar plus storage can approach a complete grid transformation — and the investment figures show it is accelerating, not plateauing.
04 pv-magazine.com↗

Flatiron Energy Closes $850 Million Financing for 1.2 GWh Massachusetts Grid Battery

Flatiron Energy secured approximately $850 million to finance its 1,200 megawatt-hour Energizar battery storage project in Chelsea, Massachusetts — one of the largest BESS project financings in New England, sited in a dense urban grid with high peak electricity demand.

  • Chelsea is adjacent to Boston and connected to a grid with limited transmission import capacity, making local storage disproportionately valuable for reliability
  • New England has some of the highest wholesale electricity prices in the US, improving the merchant economics for peak-dispatch storage
  • The financing closes without federal loan guarantees, indicating that BESS project economics are now self-sustaining in high-value US grid markets
Why it mattersA project of this scale financing on merchant economics without federal support shows that utility-scale battery storage has crossed from policy-dependent to commercially viable in premium US grid markets.
05 energy-storage.news↗
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