Solar in Arizona: The Best Sun in America, But Watch the Fine Print

Arizona gets more sunshine than any other state. Phoenix averages 299 sunny days per year and 6.5-7.5 peak sun hours per day. Tucson is nearly as good. You would expect Arizona to be the undisputed king of residential solar. It was, around 2013-2015. Then the utilities fought back, net metering was gutted, and the economics shifted significantly.

Arizona in 2026 is still a good state for solar — the sun alone guarantees that. But it is no longer the slam dunk it once was, and you need to understand how APS and SRP changed the rules before you sign anything.

The Good News

The Best Solar Resource in the Country

No state touches Arizona for raw solar potential. Peak sun hours by region:

• Phoenix metro: 6.5-7.0 hours/day
• Tucson: 6.3-6.8 hours/day
• Western Arizona (Yuma): 7.0-7.5 hours/day
• Flagstaff/Northern Arizona: 5.5-6.0 hours/day

A solar panel in Phoenix produces 20-30% more electricity annually than the same panel in New York or Ohio. This higher production directly reduces your payback period and increases lifetime savings.

Competitive Installation Costs

Arizona's mature solar market means competitive pricing. Expect $2.40-$2.80 per watt installed — among the lowest in the country. An 8kW system typically costs $19,200-$22,400.

Property Tax Exemption

Arizona law exempts solar energy devices from property tax. Your home value increases, but your tax bill does not. Given Arizona's rising property values, this is a meaningful benefit.

Residential Battery Incentives

Arizona has been pushing batteries through utility programs. SRP offers demand-management incentives for battery owners. APS has run battery pilot programs. These programs change frequently, but Arizona is one of the more battery-friendly states — and batteries are increasingly important for maximizing solar value here.

The Challenges

Net Metering Is Gone (For New Customers)

This is the big one. Arizona was an early net metering state, but the utilities successfully lobbied the Arizona Corporation Commission (ACC) to end full retail net metering for new solar customers.

APS (Arizona Public Service): New solar customers are placed on a "Resource Comparison Proxy" (RCP) export rate. As of 2025-2026, the export credit is roughly $0.03-$0.05/kWh — compared to a retail rate of $0.12-$0.16/kWh. That is a 60-75% haircut on the value of exported electricity.

SRP (Salt River Project): SRP implemented demand charges for solar customers in 2015. If you have solar, you pay based on your peak demand (the highest amount of electricity you draw at any moment), not just your total consumption. This can add $30-$50/month to your bill regardless of how much solar you produce. SRP also credits exports at well below retail rate.

TEP (Tucson Electric Power): Similar to APS, with reduced export credits for new solar customers.

The result: you cannot rely on exporting excess production for meaningful credit. Self-consumption and batteries are now essential in Arizona.

Demand Charges (SRP Territory)

If you are an SRP customer — which covers much of the Phoenix metro east side, Tempe, Scottsdale, Mesa, Gilbert — demand charges fundamentally change the solar math. Even with solar, if you draw 8kW from the grid at any point during a billing period (say, when you run your AC at night), you pay a demand charge on that 8kW peak. Solar does not reduce demand charges unless paired with a battery that can shave your peak draw.

Extreme Heat Reduces Efficiency

Arizona's 110-120°F summer temperatures cause panels to lose 10-15% of their rated output during peak afternoon hours — exactly when you need them most. Ironically, the state with the most sun also has the most heat-related panel degradation. Good installers account for this, but cheap quotes sometimes do not.

The Arizona Solar Math (2026)

Typical 8kW system (Phoenix, APS territory):

• Installed cost: $20,800 ($2.60/watt)
• Federal ITC: $0 (expired)
• State credits: $0
• Net cost: $20,800

Annual production: ~14,000 kWh

Average APS retail rate: $0.14/kWh

APS export credit: ~$0.04/kWh

Self-consumption ratio: 65%

Annual savings calculation:

• Self-consumed: 9,100 kWh x $0.14 = $1,274
• Exported: 4,900 kWh x $0.04 = $196
• Total annual savings: $1,470

Payback period: ~14 years at flat rates. With 3-4% annual rate increases, payback drops to ~11 years.

25-year savings: $20,000-$35,000

With a battery (increasing self-consumption to 85%):

• Battery cost: ~$10,000
• Total system cost: ~$30,800
• Annual savings: ~$1,750
• Payback: ~14-15 years (battery adds cost but also adds value)
• 25-year savings: $25,000-$40,000

The math works, but the low export credit means your returns depend heavily on how much of your own production you can use directly.

With Arizona's competitive installer market, comparing quotes can easily save you $2,000-$5,000 on system cost — which directly shortens your payback.

When Solar Makes Sense in Arizona

Install if:

• Your monthly electric bill is over $150 (AC-heavy Arizona bills often exceed $300 in summer)
• You can pair solar with a battery to maximize self-consumption and manage demand charges
• You are an APS or TEP customer (SRP's demand charges make the math harder without a battery)
• You plan to stay in the home 10+ years
• You have a south or west-facing roof with minimal shading

Wait or skip if:

• You are an SRP customer and cannot afford a battery — demand charges will eat into savings
• Your electricity bill is consistently under $100/month
• You plan to move within 5 years
• Your roof is heavily shaded or faces north
• You are expecting the same economics solar had in Arizona in 2014 — those days are gone

Key Takeaways

• Arizona has the best sun in America — 6.5-7.5 peak sun hours in southern regions
• Net metering is effectively dead for new customers; export credits are $0.03-$0.05/kWh
• SRP's demand charges make solar without a battery a questionable investment in their territory
• Self-consumption is the game — size your system to offset your own usage, not to export
• Batteries are nearly essential in Arizona's current policy environment
• Installation costs are among the lowest in the country at $2.40-$2.80/watt
• Payback runs 11-15 years depending on utility, self-consumption, and rate increases

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