Solar Prices Go Up December 4, 2026: Should You Buy Now?
The Section 232 import price floor is real, but the panic some sales pitches are stoking is not. Here is what the December 4 deadline moves on your quote — and what moves it far more.
On August 6, 2026, the White House signed a Section 232 proclamation imposing tariffs and minimum import price floors on imported solar polysilicon and its derivatives. The remedies take effect December 4, 2026 — roughly a four-month window before imported modules must clear US customs at or above$0.38 per watt, near triple today's spot price. If you are researching solar right now, you have probably already seen the "buy before December 4" sales pitches.
Here is the 30-second honest version. The December 4 floor is real, and module prices will reset upward toward $0.38/W at the border. But the pass-through to your installed price-per-watt is bounded: a module is one input in a residential system that runs$3.00–$3.50/W all-in, and the soft-cost stack — labor, permitting, customer acquisition, installer margin — dominates. The likely installed-price impact is a few cents per watt, which is hundreds of dollars on a typical 8 kW system, not thousands. The bigger 2026 math is the expired residential tax credit(zero federal credit on an owned 2026 system) and the financing structure you choose. Buy on the math, not on deadline fear.
1. What changes December 4, 2026
The Section 232 investigation into solar polysilicon and its derivatives produced two remedies, both effective December 4, 2026. First, a 15% ad valorem tariff on polysilicon derivatives — wafers, cells, and finished modules — applies regardless of country of origin. Note the carveout: raw polysilicon-only imports are NOT subject to the 15% tariff; only the derivative products are. Second,minimum import price (MIP) floors apply across the upstream-to-downstream chain, and importers must document that their import prices clear these floors at customs.
| Imported product | Minimum import price | Tariff |
|---|---|---|
| Polysilicon | $21/kg | Not subject to 15% tariff |
| Ingots & wafers | $100/kg | 15% ad valorem |
| Solar cells | $0.22/W | 15% ad valorem |
| Solar modules | $0.38/W | 15% ad valorem |
Source: Section 232 proclamation (August 6, 2026); floors effective December 4, 2026. The 15% tariff applies to polysilicon derivatives regardless of country of origin; polysilicon-only imports are exempt from the 15% tariff but still subject to the $21/kg floor. Importers must document that import prices clear the floors.
The practical effect: an importer cannot bring modules across the border at the current ~$0.10/W spot price after December 4 — the shipment must be valued at or above $0.38/W. For the full tariff-stacking picture — how Section 201 (now expired February 6, 2026), AD/CVD, Section 301, and FEOC rules layer on top — see our solar tariff and trade policy guide, which carries the complete layering table.
2. From ~$0.10/W spot to a $0.38/W floor
The US module market sits at or near all-time lows. Driven by roughly1.8 TW of global manufacturing overcapacity, module spot prices have fallen to around $0.10/W — a fraction of where they sat even two years ago. That oversupply is the reason the Section 232 remedy is structured as a price floor rather than a quota: the administration's stated concern is that subsidized imports at sub-market prices undercut the domestic manufacturing buildout.
What the floor means mechanically: imported modules must clear customs at or above $0.38/W. It does not set the retail price you pay, and it does not apply to modules produced domestically —US-made panels are not subject to the import floor at all. Likewise, polysilicon-only imports skip the 15% tariff (though they remain subject to the $21/kg minimum price). For the broader market context on why module prices fell this far and what the supply side looks like, our solar module prices 2026 analysis walks through the overcapacity picture.
3. How much it moves your installed price
This is where the deadline-driven sales pitch overstates the case. A solar module is one input in an installed residential system that typically runs $3.00–$3.50/W all-in. The majority of that cost is soft costs: labor, permitting and inspection, customer acquisition, installer overhead and margin, racking, wiring, and the inverter. NREL's annual cost benchmark has shown soft costs consistently dominating the US residential stack for the better part of a decade.
So when the module floor moves the imported-module border price from ~$0.10/W spot up toward $0.38/W, that ~$0.28/W module-level delta doesnot flow one-for-one into your installed $/W. How much of it passes through depends on how much of an installer's cost stack is exposed to imported modules, how much inventory they hold at pre-floor pricing, and how competitive your local market is. The honest framing is "real but bounded": the installed-price impact is plausibly a few cents per watt — on a typical 8 kW system, hundreds of dollars, not thousands. We are deliberately not publishing a more precise pass-through figure, because the actual number depends on installer inventory positions and contract terms that vary quote by quote.
For a grounded sense of where installed prices sit today, theCalifornia andTexas cost-per-watt benchmarks show the real spread you should expect — and that spread between quotes is typically far wider than the expected tariff pass-through.
4. Should you buy now? A decision framework
Three situations, three different answers.
(a) You are already planning solar in the next few months. If you have quotes in hand and are near a decision, locking a contract with committed or warehoused inventory before December 4 can preserve today's module pricing. The key is verifying the contract names the module make and model and includes a guaranteed-price clause — a "price subject to change" reservation does not lock anything. Run the numbers first in ourROI calculator, then ask each finalist installer whether they hold inventory at today's pricing and will guarantee it in writing.
(b) You are starting your research. Do the math first. The Section 232 tariff is not the main cost driver in 2026 — the expired residential credit (zero federal credit on an owned 2026 system) and financing structure (dealer fees of 15–30% baked into loans) move your all-in cost far more than the module floor. If your payback works at today's economics, great; if it does not, a December 4 deadline will not change that. Start with ourcomplete solar panel cost 2026 guide to size the system and budget realistically.
(c) You are being pressured by a "buy before December 4" sales pitch. The deadline is real, but the price impact is bounded (see section 3). A high-pressure timeline is a sales tactic, not a favor. Never sign under pressure — and if the pitch leans on a vague "government program ending," treat it as a red flag. Oursolar scams and red flags 2026 guide catalogs the common patterns.
5. What to lock in before Dec 4 (checklist)
If you decide to move before the floor takes effect, confirm the contract locks the economics rather than placeholder language:
- Named module make and model in the contract (a "tier-1 panel" line item is not a commitment).
- Guaranteed-price clause with an expiration date that runs past your install schedule.
- Cost-per-watt comparison across three or more quotes, normalized to gross $/W.
- Financing APR and dealer fee disclosed separately from the monthly payment.
- Written confirmation the installer holds inventory at pre-floor pricing.
- Correct tax-credit treatment: $0 federal credit on an owned 2026 system (25D expired) — not 30%.
The third and fourth items matter more than the tariff. A 15–30% dealer fee on a loan is a much larger hit than the module floor, and a $0.50/W spread between your three quotes dwarfs the expected tariff pass-through. Use thesolar quote comparisontool to run the red-flag checks and thefinancing comparison tool to attribute dealer fees explicitly.
6. The urgency trap
Real deadlines attract fabricated ones. The Section 232 floor is verifiable: the proclamation is published on whitehouse.gov, and the trade press covered it within hours — pv-magazine-usa.com on August 7, 2026 ("US announces tariffs, minimum import price on polysilicon imports"), solarpowerworldonline.com the same day ("Sec. 232 polysilicon results"), and EY Tax News (alert 2026-1695). You can read the primary source yourself in minutes.
The scam pattern looks different: a cold call or door-knock claiming a "government solar program" is "ending soon," often paired with pressure to sign on the spot and a request for utility-bill access. The real Section 232 remedy is a tariff on importers, not a consumer program with an enrollment window — and it does not require you to hand over anything to "lock in" a benefit. If the pitch cannot point to a specific proclamation number and publication date, assume it is manufactured urgency. Oursolar scams red flags 2026 partner page breaks out the full list of pressure tactics and how to verify any "deadline" claim against primary sources.
Sources
- White House, Section 232 proclamation on solar polysilicon derivatives (signed August 6, 2026; effective December 4, 2026) — whitehouse.gov
- pv-magazine-usa.com, "US announces tariffs, minimum import price on polysilicon imports" (August 7, 2026)
- solarpowerworldonline.com, "Sec. 232 polysilicon results" (August 7, 2026)
- EY Tax News, alert 2026-1695
The six questions below come up in nearly every "should I buy before December 4" conversation. Each answer maps to the figures already on this page: the $0.38/W module floor, the ~$0.10/W spot price, the $3.00–$3.50/W installed range, and the expired 25D credit.
Are solar prices going up in December 2026?
Yes. The Section 232 proclamation signed August 6, 2026 imposes a 15% ad valorem tariff on imported solar polysilicon derivatives (wafers, cells, and finished modules) regardless of country of origin, plus minimum import price floors — $0.38/W for modules and $0.22/W for cells — effective December 4, 2026. Raw polysilicon-only imports are NOT subject to the 15% tariff (they remain subject to the $21/kg floor). The effect is that imported modules must clear US customs at or above $0.38/W, well above today's roughly $0.10/W spot price.
How much will the Section 232 tariff increase my solar quote?
The impact is real but bounded. A module is one input in a residential install that typically runs $3.00–$3.50/W all-in, and the majority of that cost is soft costs (labor, permitting, customer acquisition, installer margin). The ~$0.28/W module-level delta between today's ~$0.10/W spot and the $0.38/W floor does not pass through one-for-one. The likely installed-price impact is a few cents per watt — on a typical 8 kW system, hundreds of dollars, not thousands. The exact pass-through depends on installer inventory and contract terms, which is why we do not publish a more precise figure.
Should I buy solar before December 4, 2026?
Where you are in the process decides the answer. If you are already planning solar and have quotes in hand, locking a contract with committed or warehoused inventory before December 4 can preserve today's module pricing — but verify the contract names the module make/model and guarantees pricing. If you are starting your research, do the ROI math first: the tariff is not the main cost driver in 2026 (the expired residential credit and financing structure matter more). And if you are being pressured by a 'buy before December 4' sales pitch, never sign under pressure — the deadline is real but the price impact is bounded.
Does the $0.38/W price floor apply to US-made panels?
No. The minimum import price floor and the 15% ad valorem tariff apply to imported polysilicon derivatives — wafers, cells, and finished modules — regardless of country of origin. Domestically produced US-made modules are not subject to the import floor. Note also that raw polysilicon-only imports skip the 15% tariff (they are still subject to the $21/kg minimum price); only the derivative products — wafers, cells, and modules — carry the 15% tariff.
Is the 30% federal tax credit still available if I buy before Dec 4?
No. Section 25D — the residential solar tax credit — expired December 31, 2025, so an owned residential system installed in 2026 receives $0 federal credit regardless of when in the year you sign. The 30% credit now flows only through Section 48E to lease and PPA providers, and the 48E construction-start deadline (July 4, 2026, rolled to July 6 under IRC 7503) has already passed. The December 4, 2026 Section 232 deadline is a tariff effective date, not a tax-credit window; it does not restore or extend any residential credit.
What's the biggest factor in my 2026 solar cost?
Your all-in cost-per-watt and your financing structure. Across our 51-state database, installed prices range from roughly $2.50/W in the cheapest states to $3.25/W in the priciest — a far larger swing than the Section 232 module floor is likely to cause. Dealer fees of 15–30% baked into solar loans routinely move the true cost more than the tariff will. Get at least three quotes, normalize each to gross dollars-per-watt, and compare financing side by side before worrying about the December 4 import floor.
This article provides general information, not trade, investment, legal, or tax advice. Figures are approximate, drawn from the cited sources (the Section 232 proclamation signed August 6, 2026, with floors effective December 4, 2026; pv-magazine-usa.com; solarpowerworldonline.com; EY Tax News) and EnergyTools data, and are current as of August 9, 2026. Last reviewed August 9, 2026. Always confirm current pricing and tariff treatment with active quotes before deciding.