Three programs once stacked to cut the cost of a California home energy system: the federal ITC, SGIP, and a VPP. In 2026 they no longer play equal roles. The federal residential ITC has expired, SGIP is mostly waitlisted, and VPPs are now the most widely open way to earn. Here's how the three compare.

For years, California homeowners were told to "stack" three incentives: the 30% federal tax credit, an SGIP rebate, and, more recently, ongoing payments from a Virtual Power Plant. The advice made sense then. In 2026 it no longer does, because two of those three programs changed dramatically. This guide compares all three as they actually stand today.

Federal ITC: expired for homeowners who buy

The federal Residential Clean Energy Credit (Internal Revenue Code Section 25D) — the "30% solar credit" — terminated for systems placed in service after December 31, 2025, under the One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025). There is no phase-down and no partial credit in 2026 (IRS).

The IRS is specific about timing: under Section 25D(e)(8)(A), an expense counts when installation is completed, so a system commissioned on January 1, 2026 receives nothing even if it was paid for in 2025 (IRS; Congressional Research Service). Homeowners who finished installation on or before December 31, 2025 can still claim the credit on their 2025 return, and unused amounts carry forward (Congressional Research Service).

One federal pathway survives in 2026: third-party ownership. With a lease or power-purchase agreement, the company that owns the system claims the Section 48E commercial credit (available for projects that begin construction by July 4, 2026 or are placed in service by December 31, 2027) and passes roughly 30% through as lower payments — but you do not claim it yourself (IRS; SEIA). For context on the credit's historic weight, SEIA credits the ITC with helping the U.S. solar industry expand more than 200% over the past two decades.

SGIP: mostly waitlisted, one income-qualified door open

SGIP (the Self-Generation Incentive Program) is a California Public Utilities Commission rebate that has run since 2001, for customers of the investor-owned utilities — PG&E, SCE, SDG&E, and SoCalGas (CPUC). It pays a one-time rebate based on the size of your home energy storage, at rates that vary by tier: roughly $150 per kWh in the General Market tier, up to $850–$1,000 per kWh in the Equity and Equity Resiliency tiers, and up to $1,100 per kWh of storage (plus $3,100 per kW of solar) under the income-qualified Residential Solar and Storage Equity budget (CPUC / selfgenca.com).

The 2026 reality: the standard budgets closed to new applications at the end of 2025 and are now waitlist-only. The one actively open pathway is the income-qualified Residential Solar and Storage Equity budget, which is itself waitlisted. Applications must be filed by a registered SGIP Developer, not by you directly (CPUC).

VPP: the most widely open way to earn in 2026

A Virtual Power Plant (VPP) pays you on an ongoing basis for sharing stored energy with the grid during peak events, while your home keeps a backup reserve and stays the priority. Unlike the other two, several VPP programs are open to new participants in 2026:

• Tesla VPP with PG&E (through PG&E's Emergency Load Reduction Program): about $2 per kWh for energy delivered during events (Tesla; PG&E).

• SMUD My Energy Optimizer Partner+ (Sacramento County): up to $5,400 per qualifying unit, capped at $10,000 per household, plus roughly $440 per year per Powerwall (SMUD).

• Sunrun CalReady: seasonal rewards for Sunrun solar-and-storage customers, with over 56,000 Californians enrolled (Sunrun).

• The statewide DSGS program (California Energy Commission) is constrained for 2026 — its per-event option is suspended and its storage VPP option is largely closed to new enrollment (CEC / Olivine).

Side by side: the 2026 comparison

What actually lowers your cost in 2026

With the federal credit gone for people who buy their system outright, the practical 2026 levers are: an SGIP rebate if you are income-qualified on an investor-owned utility; a VPP for ongoing earnings on a system you already own or are adding; a lease or PPA if you specifically want the 30% passed through via the commercial credit; and utility-specific programs, which matter enormously in Sacramento, where SMUD runs its own rebate and VPP outside the state framework. The right combination depends on your utility, your income, and whether you own or lease.

Where an honest advisor fits

The confusing part is not what these programs are — it's which ones you can actually use this year, since availability shifts constantly. California Energy Initiative is a Sacramento-based local energy advisory service, not a contractor or installer. We check your utility, income eligibility, and equipment, explain which combination is realistic right now, and connect you with independent licensed installers you can verify yourself. Our assessment is free, with no pressure to sign anything.

Frequently asked questions

Is the federal solar tax credit gone in 2026?
For homeowners who buy their system, yes — Section 25D expired for systems placed in service after December 31, 2025 (IRS). Only third-party-owned systems (lease or PPA) still capture roughly 30%, through the Section 48E commercial credit that the provider claims and passes through.

Can I still get SGIP in 2026?
The standard budgets are waitlist-only. The one actively open pathway is the income-qualified Residential Solar and Storage Equity budget, which is itself waitlisted. A registered SGIP Developer files the application, not you.

Which pays more over time, SGIP or a VPP?
They have different shapes. SGIP is a one-time rebate at installation; a VPP pays repeatedly, season after season. Many homes benefit from both where the rules allow it.

Can these incentives be combined?
Sometimes. One-time rebates and ongoing VPP payments often pair, but conflicting-program and baseline rules apply, so the specific combination has to be confirmed before you count on it.

Is California Energy Initiative a contractor?
No. CEI is a Sacramento-based local energy advisory service. We help you check eligibility and connect with independent licensed installers, and we're not affiliated with californiaenergyinitiative.org.

California Energy Initiative is a Sacramento-based local energy advisory service. We help homeowners check program eligibility, get a free assessment, and connect with independent licensed installers. We are not a contractor or installer, and we are not affiliated with californiaenergyinitiative.org. Call (888) 288-6988 or visit cainitiative.com.