Commerce Department officials set a 94.36% weighted-average dumping margin on crystalline silicon photovoltaic cells from Indonesia in a final determination published Sept. 16, with companion determinations for Laos and India the same day. Separately, the 30% federal credit that once trimmed the price of a rooftop system does not apply to property placed in service after Dec. 31, 2025. The two actions come from different agencies and are not linked by any statute or notice, but both bear on what a household pays for solar equipment.
Whose 94.36% margin this is
The Federal Register notice for Indonesia assigns the 94.36% margin to PT Blue Sky Solar Indonesia, PT REC Solar Energy Indonesia and to all other Indonesian producers and exporters. The two named companies received the rate on the basis of adverse facts available, a Commerce method used when respondents do not supply the information requested. The period of investigation ran from July 1, 2024 to June 30, 2025.
The notice was signed on Sept. 10 by Christopher Abbott, Deputy Assistant Secretary for Policy and Negotiations. On publication, Commerce instructed Customs and Border Protection to require cash deposits for estimated antidumping duties on covered entries. Those deposits are collected from importers at the border, so the duty appears as a cost to the companies bringing cells and modules into the country rather than as a line on a homeowner’s invoice. The product scope covers crystalline silicon cells and modules, assembled or not, and excludes thin-film products. Because modules are covered along with bare cells, the scope reaches the assembled panels that installers actually mount on a roof, though the notice does not say how much of any retail price the duty could reach.
Laos at 65.43% and India at 123.04%
The Indonesian rate is the middle of three. The Laos determination found a 65.43% margin for Solarspace Technology (Laos) and the country-wide entity, covering January to June 2025, with adjusted cash deposit rates of 65.03% after a countervailing-duty offset. The India determination set 123.04% for Mundra Solar PV, Mundra Solar Energy, Kowa Company, Premier Energies Photovoltaic and all other producers, with the four named companies rated on adverse inferences.
Why the duty is not yet settled
A Commerce determination is half of an antidumping case. The Indonesia notice states that the International Trade Commission must decide whether the U.S. industry is materially injured no later than 45 days after the final determination, and it spells out the alternative: “If the ITC determines that such injury does not exist, this proceeding will be terminated, all cash deposits posted will be refunded, and suspension of liquidation will be lifted.” The Laos and India notices carry the same refund language.
No commission vote appeared in the sources reviewed as of Sept. 30, so the deposits now being collected are provisional. If the ITC finds injury, Commerce issues an antidumping duty order and duties are assessed on entries after the suspension date. That fork matters more than the headline percentage, because a margin measures pricing by the exporter, not what will ultimately be collected.
The 30% credit and its Dec. 31, 2025 cutoff
The IRS page on the Residential Clean Energy Credit, last reviewed July 4, 2026, says the credit equals 30% of the cost of qualified property installed from 2022 through Dec. 31, 2025, and that it “is not available for any property placed in service after December 31, 2025.” Solar electric panels, solar water heaters, wind turbines, geothermal heat pumps, fuel cells and battery storage all sat under it. Taxpayers who claimed the credit for 2025 on Form 5695 can carry any unused excess forward to reduce tax in later years, according to the IRS, but a system finished this year earns no new credit.
The duty arrives, then, in the first full year without the incentive. Nothing in either government source ties the two together, and neither estimates how much of a duty on imported cells shows up in a retail quote.
What an installed system costs after the credit
ConsumerAffairs’ August 2026 cost update puts the average professionally installed residential system at $20,534 before incentives, or $2.78 per watt, for a typical 7-kilowatt household system. The site describes $2.50 to $3.25 per watt as the usual range and notes that the federal credit “expired last year,” steering buyers to state, local and utility incentives instead. By simple arithmetic, 30% of that average would have been about $6,160, the size of the gap the expired credit leaves on a typical purchase. The ConsumerAffairs average is a market figure published in August, before any of these cash deposits could have worked through installer pricing.
For an older homeowner on a fixed income, that gap is the practical question: a cash outlay of roughly $20,000 that no longer earns a federal tax offset, priced against electric bills and a payback period the same source puts anywhere from 5 to 15 years. Whether a duty on Indonesian, Laotian or Indian cells lifts that price will depend on where installers source modules and on the ITC’s vote, which the Federal Register notice says is due within 45 days of the Commerce determination.
Property-tax relief that requires an application
Older homeowners on fixed incomes can be eligible for property-tax freezes, exemptions and circuit-breaker credits, and some states extend a circuit-breaker credit to renters. These programs usually have to be applied for and renewed, and they are rarely applied automatically.
The Senior Property Tax & Home-Cost Relief Kit is an 11-page kit that covers the 5 kinds of property-tax relief and the circuit-breaker credit that includes renters, with an application log and renewal calendar for keeping filing dates in one place.
Tap here to get The Senior Property Tax & Home-Cost Relief Kit and its renewal calendar →
This article was produced with AI assistance and checked against the primary sources linked above.
Warren Cohen is a finance writer based in Phoenix, Arizona, covering personal finance topics including credit, banking, and beginner investing. He earned his degree in business administration from Arizona State University and began his career working in consumer finance, where he gained direct experience with lending and credit systems. He now writes for personal finance websites and fintech platforms, focusing on clear, practical content that helps readers make informed financial decisions.
