The Old Solar Sales Script Is Out of Date
California solar installers cannot keep selling with a 2024 tax-credit script.
The One Big Beautiful Bill Act, signed July 4, 2025, accelerated the end of several clean-energy incentives. The residential clean energy credit under Internal Revenue Code Section 25D is no longer available for expenditures made after December 31, 2025. That means a homeowner installing residential solar in 2026 usually cannot rely on the old 30% Section 25D federal credit.
Commercial and business projects are different. The technology-neutral clean electricity investment credit under Section 48E still exists, but OBBBA added an accelerated termination rule for certain wind and solar facilities. For applicable solar projects whose construction begins after July 4, 2026, the credit can terminate if the facility is placed in service after December 31, 2027. Treasury and IRS guidance also tightened how beginning of construction is established for these rules.
Do not promise a tax benefit from memory. Every proposal needs to identify who owns the system, whether the project is residential or business, when construction begins, when the system is expected to be placed in service, and which incentive rules apply.
The Residential Section 25D Credit Ended After 2025
This is the biggest change for residential sales teams.
The IRS states that the Residential Clean Energy Credit under Section 25D applied to qualifying residential clean-energy property through December 31, 2025. It is not available for expenditures made after that date.
For years, the 30% federal credit was a major part of homeowner economics. In 2026, an installer should not build a standard cash-sale proposal around that credit. That does not mean residential solar has no economic value.
Homeowners may still care about utility rates, backup power, battery resilience, financing terms, roof condition, expected production, net-billing economics, and state or utility incentives. But the federal homeowner tax-credit assumption has changed. Sales materials need to change with it.
Commercial Solar Still Has Federal Incentive Paths
Business-owned solar is not the same as homeowner solar.
Section 48E, the Clean Electricity Investment Credit, usually applies to qualified clean-electricity facilities and energy storage placed in service after December 31, 2024. The IRS describes a base credit of 6% of qualified investment, potentially increased when prevailing-wage and apprenticeship requirements are met, with possible additional increases for domestic content and energy-community qualifications.
Those percentages are not automatic. Eligibility depends on the project facts and compliance requirements.
For California installers selling to commercial-property owners, contractors, manufacturers, farms, or real estate investors, the conversation should shift from “you get 30%” to “your tax adviser needs to model the specific project.”
The July 4, 2026 Beginning-of-Construction Date Matters
OBBBA created an important timing rule for applicable wind and solar facilities.
IRS Notice 2025-42 explains that for applicable solar facilities whose construction begins after July 4, 2026, Section 48E can terminate if the facility is placed in service after December 31, 2027.
The guidance also limits the traditional five-percent safe harbor for this specific deadline, usually requiring the Physical Work Test to establish beginning of construction, subject to limited exceptions. That makes project documentation more important.
An installer should not tell a customer that signing a contract, paying a deposit, or ordering equipment automatically proves construction began for federal tax-credit purposes.
The tax rules have specific standards. If a commercial client is relying on a credit, get the tax adviser involved before the project schedule is locked.
Battery Storage Still Matters
Storage deserves its own conversation.
The Section 48E rules cover certain energy-storage technology, and the 2025 termination provisions for wind and solar include specific treatment that does not simply eliminate storage along with solar. That can make solar-plus-storage project design more important after OBBBA.
California also continues to have state-level storage and equity programs.
The California Public Utilities Commission’s Self-Generation Incentive Program, or SGIP, supports qualifying distributed-energy resources. Its Residential Solar and Storage Equity program offers incentives for qualifying low-income customers installing paired solar and storage, subject to program rules and available funding.
Program budgets open, close, and change. Do not quote an incentive from an old brochure.
Check the current SGIP program administrator and budget status when preparing the proposal.
California Incentives Did Not Disappear With 25D
The end of the federal residential credit does not mean California has no support programs. Depending on the customer and location, programs may include SGIP, low-income solar initiatives, local utility programs, or other targeted incentives.
The CPUC lists the Residential Solar and Storage Equity program and the DAC-SASH program among low-income solar resources. These are not universal rebates for every homeowner.
Eligibility can depend on income, location, utility territory, technology, budget availability, and other requirements. That means the installer’s sales process needs an incentive checklist instead of one blanket statement.
The Sales Team Should Stop Giving Tax Advice
Solar salespeople are under pressure to make the economics look clear. That creates risk when tax incentives are complicated.
A proposal might say, “Your tax credit is $12,000.”
But does the customer have the right taxpayer profile? Is the purchaser a business or homeowner? Is the system leased? Who owns the equipment? Does the project meet the placed-in-service rule? Are labor and equipment costs qualified? Are bonus-credit requirements satisfied? Do foreign-entity restrictions affect the project? Is the incentive transferable or subject to basis adjustments? Those are tax questions.
The installer can explain that incentives may be available and provide official program information. The customer’s tax professional should confirm the actual tax result.
That protects the installer and builds trust. A good sales script says what is known, what is estimated, and what needs tax confirmation.
California Solar Installer Example
Assume a California solar installer historically sells residential systems using three headline numbers: system price, expected utility savings, and a 30% federal tax credit. That worked when Section 25D applied. In 2026, the company keeps using an old proposal template.
Sales close, but customers later learn the residential credit is no longer available. Complaints rise. Salespeople start making inconsistent explanations. The owner worries about refunds and reputation.
At the same time, the commercial team is selling a warehouse project expected to be completed in 2028. Nobody has discussed the July 4, 2026 beginning-of-construction rule or the December 31, 2027 placed-in-service deadline for applicable solar facilities.
The installer has two problems. One is a sales-process problem. The other is a tax-timing problem.
The fix is to build separate residential and commercial incentive workflows, update proposal language, and require tax-review checkpoints for projects where the credit is material to the customer’s decision.
What Solar Installers Should Put in Every 2026 Proposal Process
Create a simple incentive worksheet for each project. Include:
- Customer type: homeowner, business, nonprofit, government, partnership, or other.
- Who will own the system.
- Project type: solar, storage, or paired system.
- Contract date.
- Expected construction-start date.
- Expected placed-in-service date.
- Federal incentive potentially applicable.
- State, utility, or local incentive potentially applicable.
- Compliance items that need confirmation.
- Tax-adviser signoff when the customer is relying on a material tax benefit.
That turns tax incentives into a controlled process instead of a sales promise.
Do Not Forget Depreciation on Business Projects
Commercial customers may also care about depreciation, not just credits. OBBBA made 100% bonus depreciation permanent for certain qualified property acquired after January 19, 2025, but solar project depreciation has its own basis, class-life, credit-adjustment, and eligibility considerations.
Do not casually combine a tax credit percentage and a full depreciation deduction in a proposal as if both apply to the same unadjusted cost without analysis. The customer’s CPA should model the after-tax economics.
For an installer, the best financial sales tool is often a clean project-cost schedule that separates equipment, storage, installation, interconnection, electrical work, roof work, and other costs so the tax professional has usable inputs.
What Owners Should Watch in Their Own Solar Business
The tax-credit change affects the installer too. Residential demand may shift. Sales cycles may get longer. Financing may matter more. Storage attachment rates may change. Commercial work may become a larger part of the pipeline.
Watch these metrics monthly:
- Residential close rate
- Commercial close rate
- Average project size
- Gross margin by project type
- Storage attachment rate
- Cancellation rate
- Financing approval rate
- Sales commission cost
- Backlog by expected install date
- Working capital required to carry equipment and labor
A regulatory change is not just a tax story. It can change the economics of the entire sales funnel.
Bottom Line
The federal solar incentive landscape is narrower and more complicated after OBBBA.
For residential customers, the Section 25D credit ended after December 31, 2025.
For business projects, Section 48E remains important, but solar projects need close attention to construction timing, placed-in-service dates, labor requirements, bonus-credit rules, and newer restrictions.
California programs such as SGIP may still help certain customers, but eligibility and budget availability need to be checked at the time of sale.
Do not sell tax certainty where none exists. Build a process that brings the customer’s tax adviser in early and keeps your sales team on current rules.
Frequently Asked Questions
Is the 30% residential solar tax credit available in 2026? The IRS states that Section 25D is not available for expenditures made after December 31, 2025. Homeowners considering a 2026 installation should review other state, utility, financing, and economic factors rather than assuming the old federal credit applies.
Is there still a federal tax credit for commercial solar? Section 48E remains available for qualifying clean-electricity investment, subject to project requirements and the OBBBA changes. The amount can vary based on labor and other qualification rules.
What is important about July 4, 2026 for commercial solar? For applicable solar facilities beginning construction after July 4, 2026, OBBBA’s accelerated termination rule can deny Section 48E when the facility is placed in service after December 31, 2027. IRS guidance defines how beginning of construction is established for this purpose.
Does California still have solar or battery incentives? Yes, targeted programs remain, including CPUC programs such as SGIP and certain low-income solar programs. Eligibility and available funding are program-specific and should be checked when the project is quoted.
Should a solar installer calculate a customer’s tax credit? An installer can provide current program information and project-cost data, but the customer’s tax professional should confirm eligibility and the actual tax benefit. This is especially important for commercial projects with wage, domestic-content, timing, or ownership issues.
Book a Call
Before you put a tax-credit number in the next solar proposal, verify the rules first.
At Basta & Company, we help California contractors and clean-energy businesses model tax impacts, cash flow, project margins, and growth decisions before money leaves the bank.
Book a call and get a second opinion before an old incentive assumption turns into a customer problem.
