US caps solar imports to stop stockpiling before a 4 December tariff
The US Department of Commerce has issued an emergency rule to prevent a surge of solar imports ahead of new trade measures, pv magazine reports. The temporary final rule, from Commerce's Bureau of Industry and Security together with US Customs and Border Protection, covers polysilicon, wafers, cells and modules. From 4 December, shipments become subject to a 15% tariff alongside minimum import prices under Section 232 Presidential Proclamation 11052.
Commerce is comparing each importer of record's volumes against its historical baseline. Importers bringing in substantially more than their past averages will be barred from further entries of covered solar equipment before 4 December. The importer of record can be a developer, an engineering and construction contractor, a manufacturer or a third-party supplier, depending on how the contracts assign customs clearance.
To close the route of creating new companies to import on their behalf, importers of record registered after 6 August, which have no baseline, face fixed weekly limits between 22 September and 4 December: 12 kilograms of polysilicon, seven kilograms of wafers, 2,000 cells and 55 modules. Customs brokers who help anyone evade the limits face fines or revocation of their licences. Companies can request a waiver by email with documentation.

What it means
For US projects that planned to import panels before the tariff, the window has effectively closed unless their importer has a large historical baseline. The weekly caps for new importers are set low enough to be a ban in practice, which is the point: the rule treats pre-tariff stockpiling as circumvention rather than as ordinary procurement.