One of the biggest incentives for residential solar in the United States has disappeared.
Beginning in 2026, homeowners who purchase and own a new residential solar system can no longer claim the 30% federal Residential Clean Energy Credit under Section 25D.
The change arrived much earlier than many homeowners expected.
Under the Inflation Reduction Act, the 30% credit had originally been scheduled to continue through 2032 before gradually declining.
But legislation enacted in July 2025 accelerated the expiration date to the end of 2025.
For the residential solar industry, this is a major change.
What Changed in 2026?
Until the end of 2025, eligible homeowners could claim a federal tax credit equal to 30% of the cost of qualified residential clean-energy equipment.
That included solar photovoltaic systems as well as eligible battery storage.
For example, a qualifying $25,000 solar installation could potentially generate a $7,500 federal tax credit, depending on the homeowner’s tax situation.
In 2026, that homeowner-owned federal incentive is no longer available for newly installed systems.
The IRS states that the Residential Clean Energy Credit cannot be claimed for expenditures made after December 31, 2025.
And there is an important detail.
Simply paying for a system before the deadline was not enough.
For Section 25D, the IRS generally treats the expenditure as occurring when the original installation is completed.
So if a homeowner paid for solar in December 2025 but the installation was completed in January 2026, the system would generally not qualify for the credit.
It Was Originally Supposed to Last Much Longer
This is why the change surprised the market.
The Inflation Reduction Act had extended the residential clean-energy credit at 30% through 2032.
It was then supposed to fall to 26% in 2033 and 22% in 2034.
Instead, the homeowner-owned Section 25D credit ended after 2025.
In other words, there was no gradual step down from 30% to 26% for homeowners in 2026.
For new qualifying homeowner-owned systems, the federal 25D credit effectively went from 30% to zero.
What Does This Mean for Solar Economics?
This does not mean residential solar suddenly makes no financial sense.
But the calculation has changed significantly.
Without the federal credit, homeowners now need to look more carefully at:
- Their local electricity rate
- Annual household electricity consumption
- Solar production at their location
- Installation price
- State and utility incentives
- Net-metering or export compensation rules
- Financing costs
- Battery storage needs
- Expected ownership period
A solar project with excellent sunlight and high utility rates may still offer attractive savings.
But projects that previously depended heavily on the 30% federal credit may now have much longer payback periods.
My View From the Electrical Side
From my perspective working around electrical construction, I actually think this change makes system design more important than before.
When a government incentive covers 30% of the cost, customers may focus mainly on how much solar capacity they can install.
Without that incentive, every kilowatt becomes more important economically.
The question should not simply be:
“How many solar panels can fit on my roof?”
It should be:
“How much electricity does this house actually use, when does it use it, and how much of the solar energy can be used effectively?”
I think oversized residential systems will become harder to justify in some markets if exported electricity is compensated poorly.
Load profiles, inverter sizing, roof orientation and battery economics may become much more important.
From an electrical point of view, that is not necessarily a bad thing.
It could encourage homeowners to think about solar as part of the entire home electrical system instead of simply buying as many panels as possible.
What About Solar Leases and PPAs?
There is an important distinction.
The expiration of Section 25D applies to the homeowner residential credit.
Third-party-owned systems such as solar leases and power purchase agreements (PPAs) operate differently because the solar company or financing entity owns the system.
Some third-party-owned projects can still qualify for commercial clean-energy tax incentives under Section 48E, subject to the applicable federal rules and project deadlines.
The homeowner does not personally claim that tax credit.
Instead, the project owner may receive the incentive and potentially reflect some of that value in the lease or PPA pricing.
This difference is already changing the residential solar financing market.
Wood Mackenzie reported that the industry is rapidly shifting toward third-party ownership and prepaid TPO structures following the expiration of Section 25D.
The Residential Solar Market Could Shrink in 2026
The policy change is expected to have a noticeable market impact.
Wood Mackenzie currently expects the U.S. residential solar market to contract by roughly 21% in 2026, largely because of the expiration of the homeowner Section 25D credit.
Installers are also adapting.
Some companies are putting more emphasis on leases, PPAs, batteries, EV chargers, roofing and other home-energy products rather than relying on traditional homeowner-financed solar installations alone.
That may change how residential solar is sold in the United States.
State Incentives Still Matter
The end of the federal homeowner credit does not mean every solar incentive has disappeared.
State programs, utility rebates, property-tax rules, renewable-energy credits and net-metering policies vary significantly across the country.
That means solar economics in 2026 can differ dramatically between two homeowners in different states.
This makes local research much more important than it was when a nationwide 30% federal credit applied broadly.
Final Thoughts
The biggest change in U.S. residential solar in 2026 is simple:
The 30% federal Section 25D tax credit for new homeowner-owned residential solar installations is gone.
That will likely make some projects less attractive and push more consumers toward third-party financing models.
But it does not mean residential solar is finished.
In my view, the market is moving into a stage where electricity prices, actual household load, system design, battery storage and local incentives matter more than ever.
Before 2026, the federal tax credit could help make many projects financially attractive.
Now each project has to stand much more strongly on its own economics.
For homeowners considering solar today, the most important question may no longer be:
“How much tax credit can I receive?”
It may be:
“How much of my electricity bill can this system realistically reduce?”
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