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California · Education only

Fresno, PG&E, and why the battery question changed.

California rewrote how rooftop solar is credited, and that quietly changed what a battery is for. This page explains the mechanics and points you at the primary sources. It sells nothing.

Reviewed by Vantage Valley Eco Last updated

This page is education only. Vantage Valley Eco offers homeowner solar education conversations in California. This guide does not collect contact information or offer an installation service.

There is no form on this page, no address field, and nothing to sign up for. Everything below points to a primary source you can read yourself, or to the state agency whose job it is to help you. California residents can read about their data rights at the California Attorney General's CCPA page.

First, confirm who bills you

This page is written for Fresno-area homeowners whose electricity comes from PG&E. Check the top of your bill, where the utility name is printed. If it says something else, the rate mechanics below do not apply to you, and your own provider's rules govern.

What changed, in one paragraph

PG&E states that customers who submitted an interconnection application after April 14, 2023, are enrolled on its Solar Billing Plan, PG&E's implementation of the state's Net Billing Tariff. Under it, you receive an Energy Export Credit for electricity you send to the grid, and PG&E says that credit "will reflect the value of the power provided to the grid at a given time," varying by time of day, day of the week, and season. Residential Solar Billing Plan customers are automatically enrolled in PG&E's Electric Home rate plan, and PG&E states that all Solar Billing Plan customers must be enrolled in an applicable time-of-use rate plan.

The older arrangement it replaced credited exports much more simply. The background on why California changed it, and what it applies to, is on the CPUC's own page: Net Energy Metering and the Net Billing Tariff. We walk through the tariff itself in the Net Billing guide.

Why that reframes the battery question

Under a system where exported energy is credited at one flat value, a battery is mostly a backup device. Under time-varying export credits, the timing of every kilowatt-hour matters: what you pay for the power you draw, and what you are credited for the power you send.

So the question shifts. It stops being "how much will my panels export" and becomes "when does my household use power, when does the roof produce it, and what is the gap between those two worth." A battery is one way to move energy across that gap. Whether it is worth what it costs depends entirely on your own consumption pattern, your rate plan, and the equipment price you are quoted. That is why nobody can answer it for you in a general article, this one included.

What we can tell you honestly is what determines the answer:

Incentives: two things to check, and one to stop believing

SGIP. California runs the Self-Generation Incentive Program, which has included support for energy storage. Eligibility categories, budgets, and availability change over time, and some categories are aimed at specific customer situations. Read the current state of it at the CPUC's SGIP page rather than accepting a figure from a proposal.

The federal credit. The IRS states that the residential clean energy credit "is not available for any property placed in service after December 31, 2025." That date has passed. If a proposal you are shown includes a federal credit, check the IRS page yourself and ask them to justify it in writing. Only a qualified tax professional can advise you on your own tax position, and nothing here is tax advice.

Any incentive you cannot find on a government website. If a program is real, the agency running it has a page about it. If the only evidence of a "rebate expiring Friday" is the person telling you about it, that is the whole story.

What California already gives you before you sign

The CPUC publishes a California Solar Consumer Protection Guide. It is short, it is written for homeowners, and it is worth more than any sales presentation. The points it makes:

Being handed a tablet and told to sign quickly is specifically flagged in that guide as a dishonest tactic. You are allowed to say no and read it at your kitchen table.

Keep reading

APS homes and solar.

Your APS rate plan

APS TOU-E on-peak is 4–7 p.m. Mon–Fri, year-round. Winter (Nov–Apr bills) super off-peak is 10 a.m.–3 p.m. weekdays at $0.03495/kWh. The plan is open to solar customers. Source: APS TOU-E

APS "TOU 4pm-7pm Weekdays with Demand Charge" bills the highest on-peak hour. Source: APS Compare Plans

Saver Choice Plus (demand 3–8 p.m.) is frozen for new customers; existing customers may stay. Source: APS Saver Choice Plus

Grandfathered net metering (EPR-6) covers systems interconnected before Sep 1, 2017. It lasts 20 years from interconnection and stays with the site. Source: APS EPR-6

A customer who chooses to switch from a legacy rate to RCP "will lose their grandfathering status and may not subsequently switch back." Source: APS Rate Rider RCP

Solar exports on APS

APS RCP export rate: $0.05554/kWh for the 2026 tranche. That covers customers who apply Sep 1, 2026 – Aug 31, 2027 (ACC Decision No. 82122). Each customer's initial RCP rate applies for 10 years from interconnection. Source: APS Rate Rider RCP · Applications Sep 1, 2026 – Aug 31, 2027

RCP export rate by year: 2017 $0.12900 · 2018 $0.11610 · 2019 & 2020 $0.10450 (one rate held two years, Oct 2019 – Sep 2021; no 2020 cut) · 2021 $0.09405 · 2022 $0.08465 · 2023 $0.07619 · 2024 $0.06857 · 2025 $0.06171 · 2026 $0.05554. Source: APS Rate Rider RCP

Any cut to the RCP "will be no greater than 10% of the previous RCP." Source: APS RCP Plan of Administration

A "material increase in capacity means increasing the capacity by 10% or 1 kW-ac, whichever is greater." After one, bill credits use the current RCP rate for the rest of the 10 years. Source: APS Rate Rider RCP

Adding a grid-interactive battery requires a new Interconnection Application. Source: APS Interconnection Requirements

Fixed and demand charges

Basic Service Charge: $0.458/day (Dec. 79293, effective Mar 8, 2024). An APS rate case is pending, so this may change. Source: APS TOU-E · Effective Mar 8, 2024

APS "TOU 4pm-7pm Weekdays with Demand Charge" bills the highest on-peak hour. Source: APS Compare Plans

SRP homes and solar.

Your SRP price plan

On Feb 27, 2025 the SRP board approved: "Residential solar price plans (E-13, E-14, E-15, and E-27) will remain open until the November 2029 billing cycle." These are the legacy solar plans. Source: SRP newsroom · Board approved Feb 27, 2025

In Nov 2029, E-13 and E-14 move to E-28. E-15 and E-27 move to E-16. Source: SRP E-13; SRP E-15; SRP E-27

E-16 "Manage Demand 5–10 p.m. and Save" and E-28 "Conserve 6–9 p.m. and Save" are solar-eligible current plans with no end date. Source: SRP E-28

Adding to an operating system needs a new PowerClerk application, with an as-built three-line diagram and site plan of the existing facility. Source: SRP DER process flow; SRP PowerClerk user guide

Solar exports on SRP

SRP E-16 and E-28 export credit: $0.0187/kWh, "Effective as of the May 2026 Billing Cycle; subject to adjustment." It is recalculated each May from a 3-year average of hourly energy prices. Source: SRP ratebook, published Apr 27, 2026 · Effective as of the May 2026 Billing Cycle

On SRP E-15 and E-27, exports are netted against imports each billing cycle, tracked by TOU period. Any net excess is credited "at the retail per-kWh price under this price plan." Source: SRP E-15; SRP E-27

Fixed and demand charges

Monthly service charge: $20 / $30 / $40, based on dwelling type and service amps. Source: SRP E-13

E-27 bills the highest 30-minute on-peak demand. May, Jun, Sep, Oct: first 3 kW $9.85/kW, next 7 kW $16.32/kW, each additional kW $29.26/kW. Jul–Aug prices are higher. E-15 uses the average of daily maximum 30-minute on-peak demands. Source: SRP E-27; SRP E-15

The Fuel and Purchased Power Adjustment is reduced for the May–Oct 2026 billing cycles. Source: SRP ratebook, published Apr 27, 2026

What this page cannot tell you

Sources

Every factual claim above traces to one of these. Check them yourself, because that is what they are for.

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