New Tariffs to Hike US Solar Panel Costs

Homeowners considering solar power will face higher costs starting December 4, 2026, due to new Section 232 tariffs on solar components. President Trump issued a proclamation on August 6, 2026, establishing minimum import prices for solar modules, cells, and a 15% duty on polysilicon derivatives. This action aims to boost American solar manufacturing but will make solar components more expensive for consumers¹.

The overall impact on a typical home solar installation is estimated at a 3% to 5% increase in total project cost, not the 40% sometimes quoted for the imported panel itself. This translates to an estimated $600 to $1,100 increase for a 7.2 kW home solar system in California¹. Understanding these new tariffs helps homeowners make informed decisions about their solar investment.

What the New Tariffs Mean for Solar Costs

The core of the new Section 232 proclamation is the establishment of Minimum Import Prices (MIPs) and additional tariffs on various solar components. These measures take effect on December 4, 2026, at 12:01 a.m. Eastern Time¹. The goal is to address perceived threats to U.S. economic and national security from polysilicon imports, particularly concerning semiconductor supply-chain security².

Specifically, the minimum import price for solar modules is now 38 cents per watt ($0.38/W). For solar cells, the minimum import price is 22 cents per watt ($0.22/W)¹. These prices set a floor below which imported products cannot be sold in the US.

A 15% ad valorem tariff will also apply to certain polysilicon derivative products, including ingots, wafers, cells, and modules¹. This 15% tariff is in addition to other existing duties, such as Section 301 tariffs, which could result in combined duties over 65% for some Chinese-origin solar derivatives². Microinverters are not covered by these new tariffs .

Broader Scope and International Impact

Unlike previous tariffs, this Section 232 action has a broader scope, extending to upstream products like polysilicon, ingots, and wafers¹. This means the tariffs impact earlier stages of the solar component manufacturing process. If importers do not provide the required pricing documentation, the full MIP level will apply as a specific tariff².

There are some country-specific modifications to these tariffs. Products from the United Kingdom will face a 10% tariff. For products from Japan, South Korea, Taiwan, Switzerland, Liechtenstein, and the European Union, the combined Section 232 tariff and Column 1 duty rate is capped at 15%².

How Tariffs Affect Home Solar Project Costs

The direct impact of these tariffs on a homeowner's solar installation cost is less dramatic than headlines about panel price increases might suggest. While the often-quoted 40% price increase refers to the imported panel itself, this is not the total project cost for homeowners. Panels make up approximately one-fifth of the total cost of a home solar installation¹.

The majority of home solar project costs come from labor, racking, inverters, wiring, permits, and overhead¹. These components and services are not directly imported polysilicon products and are therefore less affected by the new tariffs. Roth Capital Partners estimates an average overall module price increase of about $0.10/W across the market³.

Consider a typical 7.2 kW California home solar system. Before incentives, such a system cost around $22,600 in August 2026⁴. The direct panel cost impact from the new tariffs for this system is estimated to be between $600 to $1,100. This leads to an overall project cost increase of 3% to 5%¹.

As of August 2026, the average cost of solar panels in California was about $3.14 per watt . Other sources indicate 2026 installed costs ranging from $2.40 to $3.25 per watt, with a 7 kW system costing roughly $16,800 to $22,750⁶. For more detailed regional cost information, homeowners can explore resources like the cost of solar panels in Orange County, California, or how much solar panels cost in Texas.

Impact on Solar Incentives and the Industry

The new tariffs arrive after the expiration of a significant federal incentive. The 30% federal residential tax credit (Section 25D) expired on December 31, 2025. Systems purchased in 2026 do not qualify for this credit¹. This means homeowners will face higher upfront costs without the benefit of this tax credit.

The Solar Energy Industries Association (SEIA) has expressed concern that these tariffs will create challenges for American manufacturers and raise energy costs for consumers⁷. The cost increases are expected to challenge solar installers and could slow the growth of the solar industry by decreasing demand⁵. The U.S. already has some of the highest solar module prices globally due to previous tariffs⁸.

The new price floor could make U.S. solar module prices nearly five times the global benchmark price. Even with these tariffs, the U.S. is expected to remain heavily dependent on importing cells, wafers, ingots, and/or raw polysilicon for the foreseeable future. The U.S. is "virtually entirely dependent on imports of solar ingots, wafers, and cells"⁷.

Looking Ahead

The new tariffs aim to boost domestic solar manufacturing, and some solar stakeholders view them positively⁷. However, history shows that previous solar tariffs (2012-2019) led to increased prices for American consumers and slowed solar adoption. These past tariffs ultimately reduced overall economic welfare, as domestic manufacturing jobs increased, but downstream installation employment decreased more.

Companies that commit to building, refurbishing, or expanding a U.S. facility for these products and begin construction by January 20, 2029, may be able to avoid higher costs⁹. The Commerce Department will also monitor for stockpiling, and companies found to be doing so may face import restrictions². Homeowners planning a solar installation should factor these new costs into their budgeting.

Sources:

1. Trump's New Solar Tariffs: What They Mean for California Homeowners (August 2026) (nrgcleanpower.com)

2. President Trump orders tariffs and price floors in polysilicon Section 232 action (whitecase.com)

3. Section 232 Solar Tariffs: Impact on Plug-In Solar Panels & Prices (pluginsolarus.com)

4. California Solar Cost and Savings, California, 2026 (californiastatesolar.org)

5. Section 232 Tariffs Are Official: Why Solar Prices Are Expected to Increase – EDGE Energy (edge-gogreen.com)

6. Solar Panel Cost in California 2026: $2.40–$3.25/Watt After Tax Credits (nrgcleanpower.com)

7. Can Tariffs Boost U.S. Solar Component Production?, Alan Ohnsman, 2026 (forbes.com)

8. Trump launched big new solar tariffs. Here's what it means. (canarymedia.com)

9. Trump Administration Targets Imports of Polysilicon and Derivative Products, 2026 (pillsburylaw.com)