What the Dec. 4 Module Price Floor Means for Pond Solar

On December 4, 2026, a minimum import price takes effect on solar cells and modules entering the United States. For anyone budgeting a floating array for 2027, that date moves the numbers more than any spec sheet will. Here is what the rule actually says, what it does to the panel line of a pond project, and the decisions worth making in the next seven weeks.

What the August proclamation did

A Section 232 proclamation signed August 6, 2026 — "Adjusting Imports of Polysilicon and its Derivatives into the United States" — set minimum import prices (MIPs) and a new ad valorem tariff on polysilicon and the products made from it. Both take effect at 12:01 a.m. ET on December 4, 2026, for goods entered for consumption or withdrawn from warehouse on or after that moment (White & Case).

The floors themselves (Hunton Andrews Kurth):

The mechanism matters as much as the number. If an entry's declared price falls below the MIP, a specific tariff is assessed up to the MIP level. If the required pricing documentation is not filed at all, the full MIP applies as a specific tariff (White & Case).

On top of the floor sits a 15% ad valorem Section 232 duty on polysilicon derivatives — ingots, wafers, cells and modules. UK-origin goods are at 10%, and for the EU, Japan, South Korea, Taiwan, Switzerland and Liechtenstein the Section 232 duty is set so the combined Column 1 and Section 232 rate generally totals 15% (Hunton Andrews Kurth). These duties stack with existing Section 301 tariffs and with antidumping and countervailing duties rather than replacing them (White & Case).

Why $0.38/W is the number that matters

A price floor only bites if it sits above the market. This one does.

Anza's platform median for imported modules on August 5, 2026 was 27.1¢/W. Modules assembled in the United States from imported cells ran 30¢/W, and modules built with U.S. cells and imported wafers ran 47¢/W (Anza). Anza's separately published Pulse data put the median for U.S.-assembled modules at $0.30/W in July 2026, with an interquartile range of $0.280–$0.325/W across 55 modules from 19 suppliers (pv magazine USA).

Set the floor against those figures and the gap is roughly 11¢/W on imported modules. Anza's own estimate is that imported modules land near 38¢ and modules assembled here from imported cells near 43¢ once the rule binds — increases on the order of 40% on the module line alone (Anza). Modules that fall outside the covered HTSUS codes, cadmium telluride thin film among them, are not directly subject to the MIP (Anza).

What eleven cents does to a pond array

Take a 20 kW three-phase configuration: 32 modules at 640W, or 20,480 watts of nameplate. The Gen3 structure kit for that configuration is $4,796, structure only — panels, inverters and wiring are separate line items (kit pricing).

Prices per watt from Anza's August 5, 2026 median and post-rule estimate.

So on a single 20 kW array the module line moves about $2,230 — close to half what the structure kit costs. Scale it and the arithmetic is unforgiving: at a 10.9¢/W delta, a 100 kW project absorbs roughly $10,900 and a 1 MW project roughly $109,000, before anyone touches labor, anchoring or interconnection.

That is the whole point for a buyer. Nothing about the water, the anchors or the electrical design changed in August. The module line did.

The other date: October 14

A second trade action is running on its own clock. On September 11, 2026, Commerce issued final antidumping and countervailing determinations on crystalline silicon cells from India, Indonesia and Laos: India at a combined 249.13%, Indonesia up to 268.06%, and Laos up to 219.10% (PV Tech).

The USITC injury vote is scheduled for October 14, 2026 — the day after this post goes up, so check the outcome before quoting anything from these origins. An affirmative vote sends the cases to final orders scheduled for November 2; a negative vote terminates the investigations and refunds cash deposits (PV Tech). Either way the result lands before the December 4 floor does, and it determines whether three more supply origins carry triple-digit duties on top of the Section 232 action.

Why stockpiling is not the easy answer

The 120 days between the August 6 proclamation and the December 4 effective date is an obvious window, and the proclamation anticipated that. Commerce is directed to monitor imports, and where it finds a company stockpiling it "shall take action in coordination with CBP to restrict imports by the company and its affiliates." No threshold, monitoring method or specific remedy is published, and trade counsel have flagged the possibility of retroactive exposure on entries made before December 4 (White & Case).

The practical read for an installer or EPC: modules already landed and sitting in a U.S. warehouse carry a different risk profile than fresh import orders placed now for pre-December arrival. Who holds that risk is a contract question, and it should be in writing.

Four things worth doing before December 4

1. Make every module quote state its entry date and who carries the duty. A quote that is silent on which party absorbs Section 232 exposure if the entry lands on or after December 4 is not a price, it is a guess.
2. Keep the lines separate. Structure, modules, inverters and electrical balance of system move on different clocks and different trade rules. A bundled per-watt number hides which part just repriced — see what sits in each component group.
3. Re-run the model at the floor, not at today's quote. If a 2027 pond project only clears its hurdle rate at 27¢ modules, it does not clear it. Run it again at 38¢ in the ROI calculator before committing.
4. Treat FEOC separately from customs. Foreign-entity-of-concern restrictions are a tax-credit eligibility test, not a tariff. A module can clear customs cleanly and still create a credit problem, or the reverse. The two screens are run on different documents — background on the FEOC rules.

What this does not change

Floating structure, anchoring hardware, electrical balance of system, labor, civil work and interconnection are not priced off polysilicon, and none of them moved on August 6. Neither did the siting and sizing work: a retention pond that penciled out on area, depth, shading and host load still penciled out on those terms. What changed is one input, and it changed by a knowable amount with a knowable date.

That is actually the usable part. Most policy risk in this industry arrives as ambiguity. This one arrived as a number and a calendar date, which means it can be priced into a 2027 budget today rather than discovered in a change order.

The bottom line

The $0.38/W module floor and the 15% derivative duty take effect December 4, 2026, and at current trading levels that is roughly an 11¢/W step up on imported modules — about $2,230 on a 20 kW floating array, about $109,000 on a megawatt. The October 14 USITC vote decides whether three more supply origins carry triple-digit duties on top. Neither changes the engineering of a pond project; both change the budget. Quote the module line separately, fix the duty responsibility in the contract, and re-run the economics at the floor. If you need a channel partner to price a configuration against those assumptions, the dealer network is the place to start, or get in touch directly.

This is general information, not tax or legal advice. Tariff classification, applicable rates, stacking and eligibility depend on your specific products, entry dates and documentation. Confirm with a licensed customs broker or trade counsel before relying on any figure here.

Sources: White & Case — Section 232 polysilicon action · Hunton Andrews Kurth — minimum import prices on polysilicon and solar products · Anza — Section 232 price floor on modules · pv magazine USA — U.S.-assembled module prices steady at $0.30/W · PV Tech — final AD/CVD duties on India, Indonesia and Laos