California Residential Solar in 2026: Net Billing, Energy Code, and SGIP Guide

Source verification updated October 1, 2026. Incentive budgets, utility tariffs, and equipment eligibility can change. Homeowners should confirm current terms with their utility, program administrator, local building department, and a licensed contractor before signing a contract.

1. Net Billing Tariff: export value varies by hour

The California Public Utilities Commission adopted Decision 22-12-056 in December 2022. The successor tariff generally applies to eligible customers of Pacific Gas and Electric, Southern California Edison, and San Diego Gas & Electric who submitted interconnection applications on or after April 15, 2023. Customers who remain eligible for an earlier net-energy-metering tariff are governed by different rules.

Under the Net Billing Tariff, imported electricity is billed under the customer’s retail rate, while exported electricity is credited using values intended to reflect benefits to the grid. Those export values change by hour, month, and year. The CPUC explains that export compensation is usually below the retail rate but can rise above it during limited high-value periods, particularly some late-summer evening hours. A single statewide cents-per-kilowatt-hour figure is therefore misleading.

Battery storage can shift solar generation from low-value midday hours to the evening, but it is not automatically profitable for every household. Load shape, roof production, retail rate, battery losses, financing cost, warranty terms, tax treatment, and planned length of home ownership all affect the result. By the end of 2024, the CPUC reported that nearly 70 percent of customers taking service under the new tariff paired solar with battery storage. That is a historical statewide indicator, not a promise about an individual project’s payback.

2. What the 2025 Energy Code actually requires in 2026

California’s 2025 Building Energy Efficiency Standards, Title 24, Part 6, took effect for permit applications submitted on or after January 1, 2026. The code expands heat-pump requirements for many building types, improves envelope and ventilation provisions, and includes electric-readiness rules. The exact requirement depends on building type, climate zone, project scope, selected compliance path, and whether gas or propane equipment is installed.

Battery readiness is also narrower than a blanket “200-amp panel” mandate. California Energy Commission guidance for Section 150.0(s) says newly constructed single-family residences with one or two dwelling units and electrical service greater than 125 amps must be battery-energy-storage-system ready, subject to a listed exception. The prescriptive provisions include a 225-amp busbar rating, space for future transfer equipment, and either reserved backed-up circuit capacity or a qualifying raceway/subpanel arrangement. A nominal 200-amp service panel satisfies the busbar element only when its busbar is rated at least 225 amps.

Electric-ready provisions likewise do not mean that every existing home must immediately replace all appliances. CEC guidance describes requirements that are triggered in specified new-construction situations when gas or propane equipment is installed, with separate rules and exceptions for additions and alterations. The local authority having jurisdiction makes the permit determination, so a generic sales presentation should never replace a plan review.

3. SGIP incentives: use the current program, not an expired tier

The Self-Generation Incentive Program supports qualifying distributed energy resources. Program names, budgets, reservation status, incentive rates, and eligibility can change, so applicants should use the CPUC’s current SGIP page and the appropriate program administrator rather than relying on an old rebate chart.

For 2026 planning, the important low-income offering is the Residential Solar and Storage Equity program, which opened June 2, 2025. The CPUC lists incentive levels of $1,100 per kilowatt-hour for storage and $3,100 per kilowatt for solar, subject to program rules, eligibility, available funding, and administrator approval. Older categories such as Equity Resiliency are shown by the CPUC as programs available through 2025 and should not be presented as the current universal route for a new 2026 application.

An incentive amount is not the same as a guaranteed percentage of installed cost. Quotes can include electrical upgrades, roofing, trenching, permits, financing charges, and equipment outside the eligible calculation. Applicants should request the reservation status and incentive calculation in writing and should not authorize work solely on a salesperson’s promise that a rebate will cover the entire project.

4. Bidirectional charging is developing, not a blanket mandate

California is actively developing vehicle-grid integration. The California Energy Commission describes managed charging, vehicle-to-home, vehicle-to-building, and vehicle-to-grid applications; it also maintains a list of bidirectional equipment certified for relevant interconnection functions. Before exporting to the grid, a customer must complete the utility interconnection process and receive permission to operate.

The earlier version of this article incorrectly attributed a light-duty bidirectional-charging mandate to “Senate Bill 233.” The official California legislative record for SB 233 in the 2023–2024 session concerns temporary authorization for specified Arizona physicians to provide abortion-related care in California; it does not establish an EV charging mandate. The incorrect assertion has been removed.

For a homeowner, practical compatibility remains product-specific. The vehicle must support the intended discharge mode; the charging and power-conversion equipment must be compatible and appropriately listed; the installation must comply with electrical and building requirements; and grid export requires utility authorization. A large vehicle battery does not by itself make a home-backup system safe or legal.

5. A due-diligence checklist before signing

1. Identify the applicable tariff. Confirm the utility, interconnection status, retail rate, export schedule, non-bypassable charges, and whether the property is served by an investor-owned or publicly owned utility.
2. Model actual usage. Use at least twelve months of interval data when available. Require separate estimates for self-consumption, exports, battery losses, degradation, and rate escalation assumptions.
3. Verify the contractor and salesperson. Check the California Contractors State License Board record, correct license classification, bond, workers’ compensation status, and any Home Improvement Salesperson registration.
4. Read the required disclosures. For covered residential transactions, review the California Solar Consumer Protection Guide and the Solar Energy System Disclosure Document in the language used for the sales presentation.
5. Separate cash price from financing. Compare cash price, dealer fees, interest, escalators, prepayment terms, lien or security interests, transfer obligations, and the effect on a future home sale.
6. Verify incentives before relying on them. Obtain the program name, eligibility determination, reservation status, administrator, and calculation in writing. Tax credits depend on individual circumstances and should be reviewed with a qualified tax professional.
7. Confirm permits and interconnection. The contract should state who obtains permits, submits the utility application, corrects inspection failures, and secures permission to operate.
8. Check warranties and service. Compare equipment, labor, roof penetration, production, battery throughput or retention terms, exclusions, and who provides support if the installer leaves the market.

California households face a real shift from simple annual netting toward time-dependent energy management. The defensible decision is not “solar always pays” or “storage is mandatory,” but a project-specific calculation grounded in the current tariff, permitted design, program availability, and enforceable contract terms. Related State News Now coverage examines regional renewable-grid planning in Washington and climate-resilience planning in Arizona.