U.S. Residential Solar Set for 33% Decline in 2026

The numbers are stark. Roth Capital Partners is projecting a 33% year-over-year volume decline for U.S. residential solar in 2026 — and if you've been paying attention to capital markets and installer operations over the past few months, this isn't a surprise so much as a reckoning.

The market isn't collapsing because the sun stopped shining or because homeowners suddenly stopped caring about electricity bills. It's seizing up at the financial plumbing level, where tax equity deals get structured, capital flows, and installers fund their growth. When that plumbing clogs, everything downstream feels it.

The Compliance Wall Banks Won't Cross

The immediate culprit is the shift from traditional Section 48 investment tax credits to the new 48E technology-neutral credits — and specifically, the Foreign Entity of Concern (FEOC) rules that come attached to them.

Here's the mechanics: under 48E, banks that monetize tax credits through investment risk having to prove that less than 15% of their debt is owned by a Prohibited Foreign Entity. That compliance burden — auditing supply chains, verifying component origins, documenting everything to a federal standard — is a level of operational overhead that large banks simply don't want to absorb when the old Section 48 deals are still available and require none of it.

Roth put it bluntly: banks appear unwilling to go through the "brain damage" of dealing with 48E projects when traditional Section 48 deals remain plentiful. Multiple banks historically active in residential solar tax equity are now effectively sidelined — "pens down," in Roth's words — on 48E investment tax credits entirely.

This is an insider dynamic that gets lost in the broader policy debate. The political conversation focuses on whether tax credits exist at all. The operational reality is that even when credits exist, if the compliance framework is too onerous, the capital markets won't engage with them. A tax credit that banks won't touch is functionally worth less than its face value.

Developers can pivot to Tier 2 or regional banks, but that flexibility has a price: approximately 100 basis points of additional cost. On a margin-thin residential solar loan, that's not a rounding error. It's potentially the difference between a deal that pencils out and one that doesn't.

What's Already Breaking in the Field

Capital market stress doesn't stay abstract for long. It shows up in workforce cuts, market exits, and operational dysfunction at the installer level — and that's exactly what's happening now.

GoodLeap, one of the largest residential solar lenders in the country, has reportedly implemented price increases of approximately $1 per watt and halted originations in Florida and Texas entirely. For context, that $1/W increase on a typical 8-10 kW residential system adds $8,000–$10,000 to the total project cost. That's not a minor adjustment. That's a deal-killer for a significant portion of homebuyers who were already stretching to qualify.

The EPC contractor landscape is showing even sharper fractures.

LGCY Power, a major residential sales and EPC organization, reportedly laid off 40% of its staff recently and may be exiting both Texas and Illinois. Freedom Forever — another major player — is navigating its own turbulence. While management indicated to Roth that its recent workforce reduction was less than 6% (attributed partly to AI automation efficiencies), the company reportedly neglected to make installment payments in a legal settlement against Sunder Energy and may now be in default on a $4 million obligation. Legal defaults don't happen in healthy companies. They happen when cash flow is under serious pressure.

These aren't random anecdotes. They form a pattern: the companies most exposed to capital market volatility — those without sophisticated tax equity infrastructure or strong balance sheets — are the ones showing cracks first. The residential solar industry spent years growing fast on the back of cheap capital and accessible tax credit monetization. That era is ending, and not everyone built for what comes next.

Who Survives — and How

The stress is real, but it's not uniformly distributed. Roth Capital Partners specifically calls out Sunrun as positioned to meaningfully outperform its private third-party owned peers, precisely because of its sophistication in navigating the tax equity market. That's not a coincidence. Sunrun has spent years building the institutional relationships and compliance infrastructure to move nimbly when the rules change. Scale and sophistication matter in a compliance-heavy environment.

On the equipment side, Roth flagged that the Propel program — which has direct implications for Enphase — appears to have the capital depth to ramp volumes in a healthy way. For Enphase investors and installers who depend on their microinverter ecosystem, that's a meaningful signal: not everyone is pulling back.

The companies that will navigate 2026 are those that either have the financial sophistication to work within 48E's compliance framework or the balance sheet resilience to wait out the Treasury guidance that could clarify FEOC rules and re-open the capital spigot. Everyone else is going to have a difficult year.

What Comes Next — and What Could Rescue 2027

The trajectory beyond 2026 hinges on one key variable: how quickly Treasury issues clear guidance on Prohibited Foreign Entity rules.

Right now, that ambiguity is the root cause of most of the capital market paralysis. Banks aren't refusing to lend because they fundamentally oppose residential solar — they're refusing because they can't quantify the compliance risk. Clear, workable Treasury guidance would change that calculus almost immediately, allowing capital to flow back into the market and giving developers certainty to plan project pipelines.

Without that guidance, the risk compounds. Roth explicitly warned that if Treasury takes too long, the capital slowdown currently battering residential solar could begin infecting utility-scale projects slated for 2027 and 2028. That's the real systemic risk — not just a rough year for rooftop installers, but a multi-year slowdown across the entire clean energy finance ecosystem.

There are bright spots on the horizon, but they're narrow. Projects tied to AI and data center demand — which carry premium pricing power and often involve offtake agreements with investment-grade counterparties — are expected to receive priority in the federal permitting queue. Projects with high domestic content will similarly be advantaged. For developers who can credibly claim either of those attributes, 2026 may actually present opportunity as weaker competitors pull back and competition for bankable projects thins out.

For the broader residential market, the path forward runs directly through Washington. The 33% decline Roth is projecting isn't an inevitability written into physics or economics — it's the result of policy uncertainty creating capital market paralysis. The faster Treasury clarifies FEOC compliance standards, the faster the market can price it, adapt to it, and move on. Every month of delay is another month of installer layoffs, halted originations, and homeowners who wanted solar but couldn't get financing.

That's the real cost of policy ambiguity: it doesn't just slow paperwork. It shuts down a market.

[INTERNAL LINK: tax equity market] [INTERNAL LINK: compliance framework] [INTERNAL LINK: clean energy finance]

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