Arizona Community Solar Programs
Arizona community solar programs allow utility customers who cannot install rooftop panels — due to renting, shading, roof condition, or structural limitations — to subscribe to a share of a centrally located solar array and receive a credit on their electricity bill proportional to that share's output. This page covers the structure, eligibility rules, regulatory framework, and practical decision points that define community solar participation in Arizona. Understanding these programs requires familiarity with the distinct rules each investor-owned utility and cooperative applies, as well as the state-level standards set by the Arizona Corporation Commission (ACC).
Definition and scope
Community solar, also called shared solar or solar garden programs, is a utility-administered model in which a single large solar installation — typically ranging from 500 kilowatts to 5 megawatts in capacity — is subdivided into virtual ownership shares or subscription blocks. Subscribers receive a bill credit, often expressed in cents per kilowatt-hour produced by their assigned share, rather than a physical panel allocation.
In Arizona, community solar programs fall under the jurisdiction of the Arizona Corporation Commission (ACC), which regulates investor-owned utilities (IOUs) such as Arizona Public Service (APS) and Tucson Electric Power (TEP). Salt River Project (SRP), as a political subdivision of the state, operates outside ACC rate-setting authority under a separate governance structure established by state statute. Rural electric cooperatives follow their own member-governed frameworks.
Scope of this page: Coverage applies to community solar programs operating within Arizona's investor-owned utility service territories and SRP's district. Federal programs, programs in neighboring states, and community solar structures in states without ACC-equivalent oversight do not apply here. The page provides a broader view of the full regulatory environment that governs solar energy in the state.
How it works
Community solar operates through a structured subscription and credit mechanism with discrete phases:
- Project development and ACC approval — A utility or approved third-party developer submits a community solar project proposal. For APS and TEP, the ACC must approve program tariffs and capacity allocations before subscriptions open.
- Subscription enrollment — Eligible customers select a subscription block, typically sized in increments of 1 kilowatt (kW) or a fixed dollar amount per month. Most Arizona programs cap individual subscriptions at 100 percent of a customer's average annual electricity usage.
- Energy production and metering — The central array produces alternating current (AC) electricity, which flows directly into the grid. A revenue-grade meter (ANSI C12.20 Class 0.2 or Class 0.5 accuracy standard) records the output attributable to each subscriber's share.
- Bill credit calculation — The utility applies a per-kWh credit rate — established in the approved tariff — to the subscriber's monthly production share. This credit offsets the subscriber's standard retail electricity charges.
- Annual reconciliation — If annual credits exceed annual charges (uncommon given Arizona's tiered rate structures), most programs roll excess credits forward or provide a year-end payment at a reduced avoided-cost rate.
Virtual net metering, the credit mechanism underlying most community solar billing, is addressed in detail at Virtual Net Metering in Arizona.
Common scenarios
Renters in multi-family housing: A renter in a Tucson apartment complex pays standard TEP retail rates but cannot install panels. By subscribing to TEP's shared solar program, the renter receives a monthly kWh credit at the program's established rate, reducing the net electricity bill without any physical installation on the leased property.
Homeowners with shading or structural barriers: A Phoenix-area homeowner has significant tree canopy or a low-slope roof that fails structural load requirements for panel mounting. An APS community solar subscription provides a functionally equivalent bill reduction. For context on roof-related factors, rooftop solar vs. ground-mount systems in Arizona outlines the physical distinctions.
Small commercial accounts: A small business in SRP's territory with a flat commercial roof under a long-term lease may subscribe to SRP's community solar offering to meet voluntary renewable energy goals without capital expenditure on equipment. SRP's Earthwise Energy program provides subscription options specifically structured for commercial participants.
Low-income households: The ACC has directed IOUs to reserve a portion of community solar capacity — commonly 20 percent in approved tariffs — for income-qualified customers, who may receive an enhanced credit rate or reduced subscription fee as part of Arizona's Renewable Energy Standard and Tariff (REST) requirements. The Arizona Renewable Energy Standard and Tariff page covers REST obligations in full.
Decision boundaries
Choosing between community solar and rooftop ownership depends on measurable thresholds rather than general preference:
| Factor | Community Solar | Rooftop Ownership |
|---|---|---|
| Site control required | No | Yes (roof access, structural approval) |
| Capital outlay | Minimal (monthly subscription) | Moderate to high ($15,000–$30,000 typical installed cost) |
| Federal tax credit eligibility | Subscriber generally ineligible | Owner eligible for 30% ITC (IRS Form 5695) |
| Arizona property tax exemption | Not applicable | Applicable (A.R.S. § 42-11054) |
| Portability | Subscription may transfer or cancel (subject to program terms) | System stays with property |
| Bill credit certainty | Rate set by tariff; subject to ACC revision | Depends on net metering policy |
The federal solar tax credit application in Arizona and Arizona property tax exemption for solar pages detail the specific financial distinctions for owned systems.
Permitting obligations differ substantially. Rooftop systems require a building permit, electrical permit, and utility interconnection approval — a process outlined at solar system inspection and commissioning in Arizona. Community solar subscribers bear no individual permitting burden; the developer or utility holds all applicable permits for the central facility under Arizona Administrative Code (A.A.C.) Title 14, Chapter 2.
For a foundational understanding of how solar energy converts sunlight to grid-delivered power, how Arizona solar energy systems work provides the underlying technical framework. Visitors exploring the full scope of solar options in Arizona can begin at the Arizona Solar Authority home page.
References
- Arizona Corporation Commission (ACC) — Regulatory authority over investor-owned utility tariffs and community solar program approvals in Arizona.
- Salt River Project (SRP) — Earthwise Energy — SRP's community solar and renewable energy subscription program documentation.
- Tucson Electric Power (TEP) — Shared Solar Program — TEP program tariff and eligibility information.
- Arizona Revised Statutes § 42-11054 — Arizona property tax exemption for solar energy devices.
- IRS Form 5695 — Residential Energy Credits — Federal Investment Tax Credit claim form for owned solar installations.
- ANSI C12.20 — Electricity Meters, 0.2 and 0.5 Accuracy Classes — Metering accuracy standard applicable to revenue-grade solar production measurement.
- Arizona Administrative Code Title 14, Chapter 2 — ACC rules governing utility operations and related permitting frameworks in Arizona.