Understanding the routes for financing new solar PV manufacturing capacity in the United States has now become as important as the technologies deployed and the process flows involved.
This critical topic is set to take centre stage at the forthcoming Solar Manufacturing USA 2026 event in Austin, Texas on 22-23 September 2026 — the first event to be held in the United States focused exclusively on the build-out of a full domestic PV manufacturing ecosystem
By focusing on the sources of finance — and the key stakeholders and partnerships involved — Solar Manufacturing USA 2026 will therefore provide a unique meeting place for those tracking capital investments into U.S. PV manufacturing and the companies now creating business plans to benefit from this uptick in spending.
This article explains why PV manufacturing investment strategies in the United States are beginning to diverge from those seen historically in the PV industry going back more than 30 years; and what this means for companies active across the value and supply chains in the sector.
Debt financing and regional loans have dominated PV manufacturing investments in the past
Traditionally, new solar PV manufacturing capacity has been financed directly by the producers of polysilicon, ingots, wafers, cells and modules. The most common route has been debt financing, with few companies having the luxury to fund expansions purely with cash.
The source of these funds has been dominated by loans from regional (or in China, provincial) banks or state-backed funding vehicles, and through share placements or dual listing IPOs (typically mainland A-Share and Hong Kong H-Share combinations for China).
During the China-specific manufacturing investment boom of 2021-2023, funds were often provided from state-backed vehicles that were seeking quick returns through newly formed privately held entities moving to listed status in Shanghai or Hong Kong within 2-3 years. For many, this tactic came to an abrupt halt when IPOs were unsuccessful.
Consequently, the manufacturers themselves were largely tasked with delivering the desired return-on-capital-employed through operations; directly purchasing the necessary raw materials (for example polysilicon, wafers or cells) and then having a sales force that secured orders for the manufacturing sites.
Over the past 30 years, this self-contained manufacturing model has dominated the PV industry, with a couple of exceptions now described.
First, some companies (mostly in China) have operated in a manufacturing-lite fashion, using OEM companies to produce modules that were then rebranded. Some companies today in China (and Europe) have taken this model to an extreme, being more resellers than producers.
The other exception that has existed since about 2020 was created in the wake of the Sheffield Hallam University report on the solar industry regarding forced labour, and its impact on polysilicon supply auditing, subsequently tightened in scope following the Uyghur Forced Labor Prevention Act in the United States and the Solar Stewardship Initiative in Europe.
Owing to the limited polysilicon volumes available to the solar industry outside China (in Malaysia, Germany and the United States), module suppliers (whether these companies made cells or wafers) then sought to secure (purchase) the polysilicon directly from a select group of suppliers (Wacker, Hemlock / Corning and OCI). This polysilicon would then often be shipped to third-party ingot pullers, wafer slicing companies and even cell fabrication sites, before reaching the buyers’ factories for module assembly.
This type of purchasing (or raw materials ‘investment’) gives a hint at what is unfolding today in the United States, but is fundamentally still a manufacturing closed-loop exercise in which the module buyer (or solar site investor / asset-owner) sits at arm’s length, potentially only involved by way of contract deliverables that require certain component sourcing to be guaranteed in order to take receipt of the modules.
What is unfolding now in the United States, as it relates to specific investments in manufacturing sites and operating entities, is fundamentally different and is discussed now in the next section of this article.
Securing cell, wafer and glass supply may become more important than who assembles the module
As the attention from downstream solar project investors and developers in the United States moves to securing increased domestic production of value-chain components (polysilicon to module) and the key materials used in the manufacturing processes, it may simply become too much of a risk to rely on specific module assembly companies to ‘tick all these boxes’. Are all the module suppliers to the U.S. market today going to be in business by 2030? How many have the ‘buying power’ to secure supply volumes 5-10 years out?
Moreover, the shortage of value-chain capacity is unlikely to be at the module assembly stage; rather, it will be upstream at cells, wafers and polysilicon.
Therefore, the smart money from downstream investors and asset owners should possibly be flowing directly into securing domestic ‘off-take’ of polysilicon, wafer and cell production — the parts of the value-chain that are going to be the crux points in coming years.
This type of supply-chain sourcing would be new in the solar industry, with the previously cited module-supplier polysilicon offtake arrangement being the closest historical analogy.
The only other examples of downstream investors / owners having contractual arrangements with upstream manufacturing can be found in India today but are somewhat different. Energy and infrastructure conglomerates Adani, Tata and Reliance each operate in-house solar manufacturing activities that can supply self-developed and owned projects. And in recent years, some of India’s pure-play IPPs have backward integrated to cell and module production for in-house consumption.
However, what’s being proposed for the United States is very different to the closed-cycle India model today, with the financial transactions potentially having different paths.
The simplest example involves direct purchase of polysilicon, wafers or cells — effectively securing these domestic components to supply to a different module entity. More nuanced versions would exist when purchasing from domestic manufacturers that produce at different stages of the c-Si value-chain.
Taking the new purchasing model to an extreme, we end up with equity ownership by downstream players in upstream manufacturing capacity — something that has been muted for decades but never prioritized.
Aside from the Indian companies noted above that operate different business units for upstream and downstream renewable energy activities, the solar industry has routinely seen module suppliers operate downstream project development arms — but rarely to be long-term asset owners and often using PV modules from competitors to reduce new site capex.
It is unclear exactly how this will impact manufacturing investments in the coming years and whether downstream investments will also start to flow into materials supply such as solar glass, frames, films, pastes and quartz crucibles.
Consider the example of Tesla and the company’s 100 GW plans. Could this come to fruition by relying on raw materials suppliers to somehow be aligned with volumes when needed for production?
New financing of U.S. PV manufacturing sites presents new challenge for equipment and materials suppliers
Historically, PV equipment and materials suppliers relied on working relationships with the actual manufacturers. Moving forward, this could change for each of these supplier types.
Equipment suppliers may come under increased scrutiny from the actual ‘investors’, especially if China imposes any official (or indirect) mandates on its PV equipment suppliers to restrict exports of tools from China to the United States. This may see stronger working relationships between the source-of-funding and PV equipment suppliers with non-China ownership and manufacturing-location origin.
Materials suppliers — by virtue of domestic production bases coming to fruition in the United States — could benefit significantly, if the materials in question are likely to be in short supply in coming years.
But possibly the most urgent example where downstream funds need to flow into U.S. PV manufacturing is at the polysilicon stage. How much longer is the U.S. solar industry going to rely on the volumes produced by one company — Corning (Hemlock) — that is in the process of developing a value-chain model involving ingots, wafers and modules that could lead to all of Corning’s polysilicon being consumed in-house?
Could downstream investments into new polysilicon capacity in the United States be the most prudent use of capital in coming years?
The topic of financing new U.S. PV manufacturing sites — and securing domestic materials supply — will be a core theme across the two days of the forthcoming Solar Manufacturing USA 2026 event in Austin, Texas on 22-23 September 2026.
To get involved in the proceedings, or simply to input your ideas ahead of the event, you can contact the team at [email protected].
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