US Sets New Solar Tariffs and Minimum Import Prices from December, Replacing Expired Safeguards
On 6 August the US issued a Section 232 proclamation setting new tariffs and minimum import prices on polysilicon and solar products, due to take effect on 4 December 2026.
What the proclamation does
Law firm summaries say the measures replace the Section 201 safeguard tariffs on solar cells and modules, which expired on 7 February 2026. They cover polysilicon, silicon ingots and wafers, solar cells and solar modules.
Two mechanisms apply. First, a 15% additional tariff on the derivative products: ingots, wafers, cells and modules. One summary says raw polysilicon is exempt from that tariff but still subject to the price floors. Second, minimum import prices: $21 per kg for polysilicon, $100 per kg for ingots and wafers, $0.22 per watt for cells and $0.38 per watt for modules.
If an importer does not provide the required documentation, a specific tariff equal to the minimum price applies. If the paperwork is provided but the declared value is below the minimum, the difference is charged. Products of the UK face a 10% Section 232 tariff, and goods from the EU, Japan, South Korea, Taiwan and some other economies are set so the combined rate is generally 15%.
What we could not confirm
The summaries we read cover solar products and do not mention batteries or storage, so we cannot say whether home battery imports are affected. We also have no reliable estimate of how the measures would change prices for installers or buyers, and we are not going to guess.
The tariffs are a US measure. We found no evidence in the sources of a direct effect on UK or European households, although global trade policy can influence supply chains over time.
Why UK readers might still care
Solar panels and batteries often arrive in the same installation. Trade policy in one large market can shift where manufacturers send their products, which is one reason we watch it. For anyone in Britain thinking about a battery today, the more practical questions are sizing and the quality of the quote. Our home battery calculator and the guide to what size battery you need are a better use of the next hour than tariff speculation.
Sources
- Hunton Andrews Kurth: US Imposes New Tariffs and Minimum Import Prices on Polysilicon and Solar Products
- Sheppard Mullin: A New Floor for Solar, Section 232 Sets New Tariffs and Price Floors on Polysilicon Imports
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