Commercial Solar in Arizona: Installation Is Only Part of the Timeline
A commercial solar or battery project is not ready to operate simply because the equipment is installed. Utility review, electrical upgrades, inspections and permission to operate can all affect the date your facility receives the intended benefit.
What the latest research adds
Lawrence Berkeley National Laboratory’s September 2026 report, Interconnection Timelines and Costs for Distributed Energy Projects in the United States (2000–2025), examines data from 188 utilities in 24 states. It explores differences by project size, technology, location and time. These national results provide planning context; they do not establish a schedule or cost for an individual Arizona facility.
Build the utility approval path into your schedule
Ask your project team to identify the serving utility, application requirements, review milestones, required studies, upgrade responsibilities, inspection sequence and permission-to-operate requirements. Separate equipment delivery and construction dates from utility approval dates.
Questions to answer before committing capital
• Is the application complete, and has the utility accepted it?
• Could transformers, switchgear or other electrical upgrades be required?
• Who pays for studies and upgrades, and which costs remain unknown?
• What operating limits, export restrictions or controls could apply?
• Which dates are confirmed in writing, and which are estimates?
What this means for Arizona facilities
APS, SRP, TEP and municipal utilities have their own requirements. A warehouse, manufacturing facility or commercial property should evaluate its actual service address, proposed system, utility tariff and operating needs. A national average should never be presented as a promised Arizona completion date.
Start with a power-readiness review
Gather your utility bill, facility address, proposed solar or battery capacity, electrical drawings if available, and target operating date. Peak Ready Energy can help organize the questions and identify what requires utility or qualified-provider confirmation. Explore Time to Power or request a preliminary assessment through the site navigation.
Source: Lawrence Berkeley National Laboratory, published September 2026. https://eta.lbl.gov/publications/interconnection-timelines-and-costs
Reviewed October 12, 2026.
