The final solar duties on India, Indonesia and Laos are set. On September 11, 2026 the U.S. Department of Commerce issued its final affirmative determinations in the antidumping and countervailing duty investigations of crystalline silicon photovoltaic cells and modules from the three countries, PV Tech reported on September 14. The final dumping margins are 123.04 percent for India, 94.36 percent for Indonesia and 65.43 percent for Laos. The subsidy rates come on top: 126.09 percent for India, 73.20 to 173.70 percent for Indonesia and 82.03 to 153.67 percent for Laos, depending on the exporter.
We reported the preliminary determinations in our September 9 piece on the anti-dumping case. Two of the three numbers moved a long way since April. India's dumping margin held at 123.04 percent, but Indonesia's rose from 35.17 to 94.36 percent and Laos's from 22.46 to 65.43 percent. Combined with the subsidy rates, Solar Power World calculates total duties of 249.13 percent for India, up to 268.06 percent for Indonesia and up to 219.10 percent for Laos.
What happens between now and November 2?
Commerce's decision is one half of the process. The other half belongs to the U.S. International Trade Commission, which must find that the imports materially injured the domestic industry before the duties become formal orders. PV Tech reports that the ITC's final vote is scheduled for October 14, 2026, and that if the finding is affirmative the antidumping and countervailing duty orders will be issued on November 2.
Money has been changing hands since the spring. Importers have posted cash deposits at the border since the preliminary determinations, and PV Tech reports the adjusted deposit rates now stand at 107.17 percent for India and 65.03 percent for Laos once export subsidies already countervailed are netted out. An order in November converts those deposits into a settled duty; a negative injury vote would return them.
The petition was brought by a coalition of domestic module manufacturers. Solar Power World quotes Tim Brightbill, co-chair of the international trade practice at the law firm Wiley, which represents the coalition: "America's solar manufacturing sector is poised for a historic resurgence, with domestic module capacity up more than 750% since 2022."
What this means for a business pricing a system this fall
The three origins are, for practical purposes, closed to new U.S. projects, and the market has known that since April. Supply for the quotes a business in Georgia or Florida receives this month is built on other countries and on domestic assembly, and the deposits already collected mean much of the price effect is in those quotes today.
The point that decides a project's budget is smaller and more practical. Modules are one component of an installed cost that also includes racking, inverters, wiring, engineering and interconnection, and our analysis of commercial solar cost per kW in Georgia sets out how the pieces add up. A change in the module line moves the total by a fraction of its own percentage. What a buyer controls is timing: the origin, the model, the price and the delivery window should be written into the contract now, with delivery inside the window the supplier has priced, and not left open across the October 14 vote, the November 2 order date and the December 4 start of the separate Section 232 measures on imported modules.
The paperwork overlaps usefully with the tax credit. The supplier certification of origin that fixes tariff exposure is close to the certification the federal credit now requires under the prohibited foreign entity rules, and one request to the supplier covers both. The credit's conditions are on our federal solar tax credit page.
How we buy for a project
We deliver the array, the electrical work and the interconnection under one commercial solar EPC contract, and module procurement sits inside that contract rather than being passed through as a variable the customer carries. The number that decides whether a project makes sense is the power bill it replaces. On the 117 kW ground-mounted system at Swainsboro Supply Company that figure is about $1,800 a month, and it does not move with a duty order.
For a plant, a warehouse or a farm weighing a system now, the guidance is the same as it was in April, with firmer dates attached. Get the quote, fix the supply, and let the trade calendar run. Use our calculator for a first estimate of size and savings, or send us twelve months of utility bills and we will price the system with the module origin and delivery window written into the offer.