The Arizona Homeowner's Annual Solar System Checklist

 Your Solar System Is a Long-Term Investment. Don’t Forget the Annual Checkup. 

Solar panels are built to deliver decades of reliable production, usually with very little maintenance. That's one of their biggest selling points. But "low maintenance" isn't the same as "no maintenance.” A system that was perfectly matched to your home and your utility at installation may not be a perfect match today.  

An annual solar review is like servicing your air conditioner before summer. It is more than just confirming the equipment works. It's a chance to really check things out. For example, is it delivering the savings you expected? Have your household's energy needs changed? Can you get more value out of your investment? A natural time to schedule an audit is in the spring, before high summer energy demands kick in, or immediately after the monsoon season, but any time of year works as long as it’s consistent.

The checklist below has five parts. Most of it you can complete yourself in an afternoon, without leaving the ground, using your phone or computer. Of course, sometimes professional help is needed, but that’s where Sun Valley Solar Solutions can help.

1. Check Your Solar Production: Is Your System Performing as Expected?

Your monitoring platform is the most useful diagnostic tool you own. Whether your system reports through SolarEdge, Enphase, Tesla, or another brand's app, the platform records what your system has produced, and many platforms let you compare periods side by side. SolarEdge's app, for example, includes a year-over-year view in its Comparative Energy section.

Read More: Solar Performance Monitoring - Best Practices

Start by comparing the past twelve months of production against the year before, month by month rather than as a single total, since production swings with the seasons. Then compare it to the production estimate in your original proposal. Expect some differences. Weather varies from year to year; a dusty or smoky stretch can trim output, and every panel loses a little capacity as it ages. The National Renewable Energy Laboratory's reviews of field data have found a median degradation rate of about half a percent per year, so a small, gradual decline is normal. A sharp, sudden one is not.

A few warning signs are worth acting on: unexplained drops in production, long stretches of zero output on sunny days, inverter fault or error indicators, and gaps in your monitoring data.

That last one deserves some care. A data gap or "offline" status often means the monitoring connection has dropped (a router change, a Wi-Fi password change, or an internet outage can interrupt it), not that your panels have stopped producing. But don't assume it's harmless, either. While the connection is down, you can't see whether a real problem is developing, so it's worth getting it restored.

If production looks unusually low, note when it started, take a screenshot, and look from the ground for an obvious cause such as new shading from tree growth, heavy dust or debris, or birds. Then contact your installer or a qualified solar service provider. Don't open the inverter or try to troubleshoot electrical equipment yourself.

Between annual reviews, a quick look at your app every month or so is usually enough to catch surprises. If you know you won't check regularly, proactive monitoring can do it for you. Sun Valley Solar Solutions offers optional active monitoring for a small annual fee: our team watches your system's performance and lets you know if something isn't working as expected.

2. Inspect Your Solar Panels, Equipment, and Roof

Arizona is tough on rooftop equipment. Sustained heat and strong sun, big daily temperature swings, dust, wildlife, and monsoon storms, which can bring heavy rain, dust storms, lightning, and strong winds, all take a toll over time. Solar equipment is engineered for these conditions, and serious damage is uncommon. But small problems left alone unaddressed can grow.

What to look for from the ground

Walk around your home and look at the array. Binoculars or your phone's zoom help. Watch for:

• Cracked, chipped, or discolored panels
• Debris buildup, such as leaves, branches, or windblown trash
• Bird activity: droppings, nesting material, or birds roosting at the edges of the array
• Bird or critter screening that looks bent, loose, or missing
• Panels that look crooked, or hardware that looks loose
• Exposed, sagging, or visibly damaged conduit or wiring
• Visible damage or corrosion on the inverter, disconnects, or battery, looked at without touching or opening anything

Take a few photos each year so you can compare. Pigeons are the most common Arizona nuisance: they like the shade and shelter beneath an array, and nesting material and droppings can build up there. Rodents can chew on wiring. Both are easier to prevent than to fix, so if you see signs of activity, ask a professional about bird-proofing rather than improvising.

Do your panels actually need washing?

Some dust is normal, and routine washing isn't always worthwhile. How much dust costs you depends on where you live, how long it's been since rain, and what kind of dirt it is. The benefit of cleaning can be modest compared with the cost of paying for it, or the risk of doing it badly.

Read More: How to Clean Solar Panels? Ensure Optimal Efficiency

So rather than following a fixed schedule, let conditions and your production data guide you. If output dips after a dust storm and recovers after the next rain, nature is handling it. If production stays low after rain, or you see stubborn residue like bird droppings, cleaning may pay for itself. If you do clean, avoid spraying cold water on hot panels. Skip pressure washers, abrasive tools, and harsh chemicals, and hire a professional if the panels can't be reached safely from the ground. Our guide to cleaning solar panels covers the how-to.

Don't forget the roof beneath

Your array is only as sound as the roof under it. After significant storms, look for slipped or cracked tiles, lifted shingles, or debris collected around the array, and watch for new water stains on ceilings inside.

Roof work around solar isn't a job for a roofer working alone. Panels often have to be removed and reinstalled for roof repairs, and doing that without coordination risks damage to the panels or the roof. That's why we work with Azul Roofing Solutions, our premier roofing partner since 2016, so solar and roofing professionals can plan the work together. Our guide to roofs and solar panels explains why the roof's condition matters.

A final safety note: keep this check visual and ground-based. Never climb onto the roof, open electrical equipment, or attempt repairs yourself. This will also help to preserve your warranty. A professional inspection makes sense periodically, and sooner if your monitoring flags a problem, after severe storm damage, or before any roof work. It's also worth reading your warranty paperwork for any maintenance requirements or warranty exceptions.

3. Review Your Household's Electricity Consumption

A solar system is typically designed around how much electricity your household used at the time of installation. We believe in systems designed around the household's actual usage, and that usage doesn't stay still. A system that was right-sized years ago may be undersized or oversized for the home you have now.

Pull your utility's annual usage data from your online account and compare it with previous years. Look for step changes rather than small fluctuations. The usual suspects include an electric vehicle, new or upgraded pool equipment, additional people in the home, someone working from home, new appliances, and an air conditioner that's aging and working harder to deliver the same comfort.

Arizona's cooling demand makes this review especially valuable. Air conditioning drives so much of summer consumption that even a modest change in efficiency or thermostat habits shows up on your bills. If your usage has crept up, you'll be buying more from the grid, and often at the most expensive times of day.

Here's the part many homeowners don't expect: rising usage doesn't automatically mean you need more panels. Depending on the situation, energy-efficiency improvements, shifting when you use electricity, or adding battery storage may deliver more value for less money. What’s more, adding generating capacity (panels) can have consequences for grandfathered plans (more on that below). Our article on practical ways to lower your electricity bill in Arizona is a good starting point.

4. Review Your Utility Rate Plan and Solar Compensation

Even when your solar system is performing perfectly, the value of the electricity it produces can change as utility policies and rate plans evolve. Many Arizona solar customers have grandfathering protections that preserve certain rate structures or export compensation terms for 10 or 20 years. When those protections expire, customers may be transitioned to a different rate plan with new peak-hour windows, demand charges, or export compensation rates.

That's why we recommend reviewing your utility rate plan at least once a year. Understanding when your current protections expire gives you time to evaluate your options, explore potential benefits of battery storage, and make informed decisions before changes take effect.

If you do find that its necessary for you to choose a new rate plan, it’s helpful to understand how modern Arizona utility plans have evolved.

Today, four things shape the financial value of your solar production: time-of-use periods, demand charges, what the utility pays for the electricity you export, and general interconnection charges. Peak pricing periods have shifted in recent years as well, often landing in the evening, after solar production has faded.

Two developments matter for existing customers. APS's export-rate protection lasts 10 years from interconnection, or 20 years for older net-metering customers, after which credits follow the export rate then in effect. And SRP is retiring several older solar plans (E-13, E-14, E-15, and E-27) in the November 2029 billing cycle, with SRP's newer solar rate plans as the replacements. If either sounds like you, read what happens when your solar grandfathering expires.

For now, the practical steps are simple. Confirm which rate plan you're on, by name. Know your on-peak hours. Find out whether a scheduled change affects you. Both utilities offer plan-comparison tools on their websites, though SRP's requires at least 12 months at your residence.

One important caution: changing your rate plan or modifying your system can affect grandfathering protections or other benefits. Leaving an APS legacy plan can't be undone, and a material increase in system capacity can end a locked export rate. A plan that looks better on a comparison tool may not be better once you account for what you'd give up, so verify the implications before you make any change.

5. Explore Opportunities to Get Even More From Your Solar Investment

The technology and utility programs available to you keep evolving long after your original installation. A few options are worth asking about:

• Battery storage. A battery captures excess daytime production and releases it during expensive peak hours, instead of exporting it for a relatively low credit. Adding storage to an existing system is one of the most effective ways to modernize.
• Smart energy management. Shifting consumption away from on-peak periods can lower your bill without new equipment. SRP's own guidance for its Conserve 6-9 p.m. plan, for example, is to pre-cool the home from 3 to 6 p.m. by about three degrees and let the thermostat drift up two to three degrees during on-peak hours.
• EV charging schedules. Match charging to your plan's cheapest window. On certain SRP plans, that's the 8 a.m. to 3 p.m. super off-peak period, when rooftop solar is producing and purchasing energy at a significantly lower cost.
• Utility battery programs. SRP's Battery Partner pilot pays $55 per average kilowatt twice a year, never discharges your battery below 20%, and is approved through April 30, 2030. Participation is limited to eligible batteries, and you can opt out of events.
• Better monitoring. If your current monitoring doesn't tell you enough about your system's performance, or you never look at it, that's worth fixing.

Batteries  are especially valuable for homeowners on newer rate plans that pay little for exports compared with what electricity costs to buy. The same goes for legacy solar customers who may soon lose a grandfathered rate and move to a newer plan with a minimal buyback rate. But homeowners on favorable legacy net-metering protections with many years remaining may face a different financial picture, because the savings alone may not justify a battery, even if backup power still matters to them. Our article on whether adding a battery to an existing system makes sense walks through the trade-offs.

The goal isn't to buy new equipment every few years. It's to make sure the investment you already made keeps delivering maximum value as technology, utility rates, and your household's needs change.

A Little Annual Attention Can Deliver Decades of Solar Value

Solar is designed to be a reliable, long-term investment that needs relatively little ongoing care. A simple annual review helps you catch performance problems early, stay on top of utility changes, and take advantage of new ways to save.

At Sun Valley Solar Solutions, we think of solar ownership as a long-term partnership. That means professional service, system monitoring, battery upgrades, and help with existing systems, including ones installed by other companies.

Your solar investment deserves expert care. Let Sun Valley Solar Solutions help you keep it performing at its best.