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What Section 48E is
Section 48E is the federal Clean Electricity Investment Credit. For a qualifying commercial solar or energy-storage project, it returns a percentage of the total system cost as a credit against federal tax — and, for certain owners, as an actual cash payment.
The base credit is 6% if prevailing-wage and apprenticeship (PWA) rules aren’t met, and 30% if they are — or, importantly, if the project qualifies for an automatic exception. Any system with maximum net output under 1 MW ac gets the 30% rate automatically, with no prevailing-wage paperwork at all.
The rule that reshaped everything
The July 4, 2026 cutoff
P.L. 119-21 — the One Big Beautiful Bill Act — added a termination of the credit for wind or solar facilities placed in service after 2027 where beginning of construction is after July 4, 2026. That single sentence splits every project into two classes.
BOC on or before July 4, 2026. Can still be placed in service through December 31, 2027 and claim the full Section 48E stack.
BOC after July 4, 2026. The solar credit is terminated — zero, not reduced. The path forward is storage, state incentives, MACRS, and Direct Pay where it applies.
Beginning of construction is proved one of two ways: the Physical Work Test (physical work of a significant nature, with a continuous program of construction) or the 5% Safe Harbor (5% or more of total project cost incurred, plus continuous efforts thereafter). Continuity is enforced — a start-and-pause won’t survive audit.
For Class A projects
The Class A credit stack — up to 70%
For a sub-5-MW commercial rooftop that clears July 4 and hits every adder, the federal credit can stack to up to 70% of eligible cost:
| 30% base | Auto-exception (under 1 MW ac) OR PWA met |
| +10% Domestic Content | US-made steel, iron & manufactured products (50% threshold for 2026 BOC) |
| +10% Energy Community | Brownfield, fossil-fuel employment area, or coal-closure tract |
| + up to 20% Low-Income | Allocation-limited; sub-5 MW in qualifying tracts / Indian land |
| = up to 70% | When every adder applies to the project |
Note the basis reduction: depreciable basis is reduced by 50% of the credit claimed. Your CPA models the exact MACRS impact. Actual eligibility for each adder depends on your project — we validate it before you count on it.
Four ways to capture the value
The 4 methods
Standard credit
A for-profit owner with federal tax liability claims the credit directly on the return. The classic path — best when you owe enough federal tax to absorb it.
Direct Pay (§6417)
Tax-exempt and government entities elect to treat the credit as a tax payment and receive a refund check from Treasury. Requires pre-filing registration.
Transfer (§6418)
Sell all or part of the credit to an unrelated third party for cash — market clears around 90 cents on the dollar. You don’t need tax appetite. Requires registration.
Storage-only credit
Battery storage (5 kWh minimum) carries its own separate 48E credit line, available for property placed in service after 2024 — with a longer runway than solar.
Match yourself to a path
Which method fits you
| If you are… | Best method | Why |
|---|---|---|
| A profitable business with federal tax liability | Standard credit | You have the tax appetite to use it directly. |
| A nonprofit, school, or church | Direct Pay | You pay no federal income tax — Treasury refunds the credit. |
| A city, county, district, or co-op | Direct Pay | Government entities monetize the credit as a payment. |
| A business light on federal tax liability | Transfer | Sell the credit for cash instead of carrying it forward. |
| Adding or replacing batteries only | Storage-only credit | Storage qualifies independently, on a longer runway. |
Not sure which row is you? The picker on the right maps you to a path.
A straight-talk warning
Move with urgency
Reading this after July 4, 2026? Do not underestimate the clock.
If your project is banking on Class A treatment, the sooner your system is up and running, the safer your credit. Permitting, utility interconnection, AHJ inspection, and Permission to Operate can each take months on their own — stacked together, they routinely consume more of the calendar than owners expect. A project that broke ground in time can still miss the December 31, 2027 place-in-service deadline if construction slips.
Our promise: when we scope your job, we will give you our honest, good-willed opinion on whether the system can realistically be placed in service in time. If we believe the timeline is at risk, we will tell you before you sign — and we will help you plan the Class B path (batteries, Direct Pay, Transfer, MACRS) so no incentive is left on the table either way.
Know before you sign
The 5-year recapture rule
The credit isn’t fully locked in on day one. Within the five years after placed-in-service, certain events claw back a portion of the federal credit:
- Selling the property
- Changing use so it’s no longer qualified investment credit property
- A drop in business use of the property
- A pass-through ownership interest dropping by more than one-third
- Failing prevailing-wage rules during the 5-year alteration/repair window (if the 30% rate was claimed)
For most commercial owners holding the asset 20+ years, this is a disclosure — not a dealbreaker. But it must be understood before you sign. Exceptions include death of the taxpayer, transfers between spouses, and mere changes in business form.
What you get from us
Why we handle the paperwork
Direct Pay and Transfer both require pre-filing registration of the specific facility with the IRS — in advance, with a registration number that lands on the return. You can’t simply elect it at tax time. Miss the registration and the cash path closes.
This page is informational and not tax or legal advice. Consult your CPA or tax counsel on your specific situation.