Residential Solar Installation: What to Expect Step by Step

Going solar in the Phoenix Valley involves more steps than most people expect going in. The physical installation is actually the shortest part of the process. Most of the timeline is permits, utility paperwork, and waiting on approvals. Understanding what happens at each stage makes the whole experience less frustrating and helps you ask better questions before you sign anything.

This post walks through every phase from your first conversation to the day your system goes live, with specific notes on what homeowners in Phoenix, Scottsdale, Chandler, Mesa, Gilbert, Peoria, and Surprise should plan for.

Starting With Your Electric Bill

The process starts with a phone call or a form submission. You share a recent electric bill and describe your home. That single bill contains most of what a system designer needs: your utility, your rate plan, how much electricity you use each month, and what you pay per kilowatt-hour.

Which utility serves your home shapes the entire design conversation. APS customers in Phoenix, Scottsdale, and the northwest valley are on a Time of Use net billing plan when they go solar. SRP customers in Mesa, Gilbert, and east Chandler face a demand charge structure called E-27, which requires a different approach to system sizing. The answer to which utility you are on changes how your savings get calculated and whether battery storage belongs in your plan from day one.

You can confirm your utility and get a rough estimate of what solar would save with the solar calculator on our site before your first call.

Site Assessment and System Design

After the initial consultation, someone needs to actually look at your roof. This involves a physical site visit to check roof condition, available mounting area, and electrical panel location, along with satellite imagery analysis to model shading across all hours of the day throughout the year.

Shading matters more than most homeowners realize. A single tree that covers two panels for two hours each afternoon has a measurable impact on annual production. Good design accounts for that and either routes the array around shaded areas or factors the production reduction into the system size.

Phoenix averages 6.5 peak sun hours per day annually, among the highest figures for any major metro in the country. An 8 to 10 kilowatt system on a well-oriented Phoenix rooftop typically generates 35 to 45 kilowatt-hours per day on average across the year. For an APS customer using 1,200 to 1,500 kilowatt-hours per month, that covers 80 to 100 percent of annual electricity consumption.

Financing: The Prepaid Solar Lease

Phoenix Valley Solar works with a prepaid solar lease model that gives homeowners a 30 percent discount off the retail cost of the system. You pay the full cost upfront and use the panels for the duration of the agreement with no monthly payments and no interest.

The discount comes from removing the financing layer that gets baked into most loan-based solar pricing. A solar loan at 5 to 7 percent adds thousands of dollars to the total cost of a system over a 15 to 20 year payoff window. The prepaid lease removes that entirely, which is why the upfront price is lower than a financed system, not higher.

If you want to see a side by side comparison for your home, contact us and we will run the numbers. You can also learn more about how we approach solar installations on the about page.

Permits and Utility Paperwork

Before installation can begin, your installer submits permit applications to your city or county and an interconnection application to your utility. Both processes run concurrently, so they do not stack on top of each other.

In Maricopa County, permit timelines typically run two to six weeks depending on the city. Phoenix averages three to four weeks through the city's online portal. Mesa and Chandler process applications faster because both use fully digital review systems. Scottsdale takes longer, particularly for installations visible from a street, where additional documentation requirements apply.

The utility interconnection application puts APS or SRP on notice that your system is coming and starts their internal review. Their formal approval, called permission to operate or PTO, does not come until after installation and inspection are complete. The application still has to be submitted before installation begins.

Installation Day

The physical work is fast. For most homes in the Phoenix Valley, installation takes one to two days. A larger system on a more complex roof might run three days.

The crew installs roof attachments, runs conduit from the panels to the inverter, mounts the racking system, places and wires the panels, and connects the inverter to your electrical panel. At the end of the day, the system is built. It just cannot run yet. Turning it on requires the city inspection to pass and the utility to issue PTO.

The Inspection

After installation, a city or county inspector visits to verify the work matches the permitted drawings and meets electrical code. Qualified installers design and build to code, so this is normally a quick approval with no issues.

Most Phoenix Valley installations pass on the first inspection visit. When a minor correction comes up, the installer handles it and reschedules. It is not common, but it adds about a week when it does happen.

Utility Approval and Going Live

Once the inspection passes, the documentation goes to your utility. APS and SRP each review the paperwork, confirm the system was installed according to the approved interconnection agreement, and issue permission to operate.

APS typically processes PTO within two to four weeks of receiving the post-inspection documentation. SRP operates on a similar timeline. This is the stage that frustrates homeowners most because the system is physically complete and everything looks ready, but the panels cannot run until the utility issues its approval.

When PTO arrives, your installer schedules a short activation visit to turn the system on and walk you through the monitoring app. From that day forward, your panels are generating power and your electric bill reflects it.

How Long Does the Full Process Take?

Start to finish, a residential solar installation in the Phoenix Valley takes six to twelve weeks from a signed agreement to the day your system goes live. Eight to ten weeks is a reasonable expectation for most projects.

Permitting and interconnection applications run the first two to six weeks in parallel. Installation takes one to three days. City inspection adds one to two weeks. Utility PTO takes another two to four weeks after inspection. The physical construction work accounts for less than five percent of the total project timeline.

For APS customers in Phoenix, Scottsdale, Peoria, and Surprise, APS interconnection is usually the longer wait rather than the permit. For SRP customers in Mesa, Gilbert, and east Chandler, interconnection timelines are similar, but the design conversation before permitting takes longer because SRP's demand charge structure requires more planning before system size is finalized.

City by City Notes for Phoenix Valley Homeowners

Phoenix permits average three to four weeks through the city's digital portal. APS interconnection runs parallel and is rarely the source of delay when the application was submitted correctly at the start.

Scottsdale reviews visible installations more carefully and often requires documentation beyond standard permit drawings. Properties in planned communities or with street visibility may also need HOA approval as a separate process. Budget four to six weeks for Scottsdale permitting.

Chandler and Gilbert both use digital permitting systems and turn applications around relatively quickly. Homeowners in Gilbert and east Chandler on SRP should expect a more detailed design conversation before anything goes to permit, since the demand charge structure affects the system size calculation.

Mesa's permitting office is efficient. For homes in SRP territory, it helps to finalize system sizing and demand charge strategy before the permit application is submitted, since changes after submission slow the process down.

Peoria and Surprise are primarily APS territory. Permit timelines typically run two to four weeks, among the faster timelines in the valley, and savings projections are consistent because APS net billing math is predictable.

For a deeper look at how APS and SRP handle solar credits differently, read our post on how solar works with SRP vs APS in the Phoenix Valley. And if you want to see what your system might save based on your actual address and monthly bill, the solar calculator gives you a free estimate.

Frequently Asked Questions

How long does the residential solar installation process take in Arizona?

The physical installation takes one to three days. The full project from signed agreement to activation typically runs six to twelve weeks. Most of that time is permits and utility approvals, not construction. Phoenix Valley homeowners should plan on eight to ten weeks as a realistic middle estimate.

Do I need to be home during installation?

You do not need to be present while the crew works. You will need to be available for the city inspection and for the activation visit when the system goes live. Most installers schedule both appointments around your calendar.

What happens between installation and when the system turns on?

After the crew finishes, your installer requests a city inspection. Once the inspection passes, the documentation goes to your utility for permission to operate. APS and SRP typically issue PTO within two to four weeks of receiving the post-inspection packet. That gap is normal and expected for every project.

Is the prepaid solar lease better than a solar loan?

For most Phoenix Valley homeowners who can cover the upfront cost, the math favors the prepaid lease. You get a 30 percent discount off retail system pricing, carry no debt, and make no monthly payments. A solar loan adds interest to the total system cost over 15 to 20 years, which means paying more overall than the prepaid option even though the monthly payment looks smaller.

How do I get started with solar in the Phoenix Valley?

Use the solar calculator to get an estimate based on your actual address, or contact us to set up a conversation about your home. We look at your electric bill, your roof, and your utility to design a system that fits your actual situation. The about page covers our background if you want to know more about us before reaching out.