The US move to hit polysilicon imports with 15% tariffs and price floors has suddenly shifted the story for stocks tied into solar and semiconductor supply chains. Some companies now stand to gain from protected domestic production, while others face rising input costs and new trade risks. This article walks through three stocks exposed to these tariff catalysts, including one potential winner and two that may warrant extra caution.

Enphase Energy (ENPH)

Enphase Energy is a US based solar technology company that builds microinverters, batteries, EV chargers and software that help households and small businesses turn rooftop solar into a managed home energy system. It generates all of its reported revenue, about US$1.3b, from the design, manufacture and sale of solutions for the solar photovoltaic industry, with most sales coming from the United States. The stock is currently valued by the market at around US$5.1b.

Enphase Energy operates at the intersection of residential solar, batteries and AI data center power. However, the story is not as straightforward as the product lineup suggests. Analysts see room for earnings growth, and the company is expanding US manufacturing that could benefit from domestic content incentives. At the same time, earnings have declined in recent years and margins already face pressure from existing tariffs. The new 15% US tariff on polysilicon may push module prices higher for Enphase customers, just as tax credits start to fade and channel inventories remain elevated. Investors watching this stock need to weigh the potential of new products and international growth against tariff headwinds, softer US residential demand and a valuation that already reflects significant positive expectations.

Enphase Energy’s earnings slide and tariff-exposed margins raise a tougher question: Are investors underestimating how fragile this story looks if US residential demand stays soft? Get the full picture in the 2 key rewards and 1 important warning sign

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REC Silicon (DB:R3Q)

REC Silicon is a specialist producer of high purity silicon materials used in solar panels, flat panel displays and semiconductors. Most recent reported revenue of about $76 million came from the Butte segment, which focuses on silicon gases and polysilicon products for electronics and solar customers. The company is relatively small in market value, with a market cap of around €61 million.

REC Silicon sits at the center of the tariff story because it produces polysilicon in the US, so a 15% tariff and price floors on imported Chinese supply could make its products more competitive overnight. At the same time, the company is still loss making, has negative shareholders’ equity and relies heavily on external borrowing, with shareholders recently diluted to shore up funding. For investors willing to look past current losses of $15 million in Q1 2026 and focus on high value silicon gas niches and potential tariff support, REC Silicon is a stock that may merit closer consideration.

REC Silicon’s tariff upside story is only half written, as the balance sheet and recent losses remain in the background of every headline. Get the full context in the 1 key reward and 2 important warning signs (2 are major!)

GCL Technology Holdings (SEHK:3800)

GCL Technology Holdings is a China based polysilicon and wafer producer that also runs solar farms and related energy assets. Almost all reported revenue, about CN¥14.3b, comes from the Solar Material Business, with only around CN¥84m generated by the Solar Farm Business, so this is primarily a materials supplier to the solar industry rather than a power producer. The stock is mid cap in size, with a market value of roughly HK$21.6b.

GCL Technology Holdings sits right in the crosshairs of the new US tariffs as a major Chinese polysilicon exporter, so higher trade barriers could squeeze some of its most attractive markets just as the company is still working through unprofitability, weak returns on equity and a balance sheet funded entirely by higher risk borrowing. The shares trade at a level that some investors may view as discounted against certain estimates of fair value and are backed by a sizeable buyback program that started in June 2026. However, the combination of policy pressure, funding risk and the need to restore stable earnings means the situation is complex for investors who focus mainly on potential upside.

GCL Technology Holdings appears to be caught between tariff pressure and debt-funded operations, which can make it harder to identify the underlying sources of fragility. Get the fuller risk picture in the analysis report for GCL Technology Holdings

Seeking Fresh Alternatives Before The Crowd

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.