Stacked trade rules leave US solar builders guessing at 2027 module costs

Section 232 price floors take effect Dec. 4, and unresolved guidance is making module pricing for later-stage US solar projects hard to pin down.

US utility-scale solar developers are working through a pile of overlapping federal rules, and the next one arrives Dec. 4, 2026. That is when new Section 232 measures covering polysilicon, wafers, cells and modules take effect. Earlier hurdles included a July 4 construction-start deadline, a July 24 tariff transition, Foreign Entity of Concern restrictions, and FCC rules on inverter components. Reporting by pv magazine says equipment inventories grew 126% in Q2 2026 as developers rushed to buy ahead of the cutoffs.

The proclamation sets minimum import price thresholds of $0.22 per watt for solar cells and $0.38 per watt for finished modules. The open question is whether a manufacturer importing cells can still sell finished panels for under 38 cents per watt. US Customs and Border Protection and the Commerce Department are expected to issue procedural instructions on the self-certification forms importers must complete at entry. They have not yet done so.

Projects already under construction are largely shielded, since their hardware was contracted before the proclamation. The exposure sits in pipeline projects due to start in 2027 and later. Sabah Bayatli, CEO of San Antonio developer OCI Energy, says module pricing after Dec. 4 is hard to set without more guidance. He says OCI uses change-in-law and change-in-tariff clauses to spread risk among sponsors, vendors, EPC contractors, lenders and off-takers. Costs not built into financial models, he says, will end up in power prices as higher PPA prices.

For energy abundance, this is friction. Solar is among the cheapest sources of new power, and price floors on equipment push in the other direction. Uncertainty also raises contract and financing costs before a single panel is installed. Watch for the Customs and Commerce guidance and for how 2027 projects are priced. Note that the price-floor interpretation is unresolved, and most of the analysis here comes from one developer executive.

Source: pv magazine