Arizona homeowners have some of the strongest solar savings in the nation — driven by abundant sunshine, above-average electricity rates, and generous incentives. A typical Arizona home with an 8 kW solar system can expect to save $45,000–$65,000 over 25 years, with the wide range depending on your utility, system size, and how you finance.
This guide breaks down exactly how Arizona solar savings are calculated, what drives the range from $28k to $95k, and what your specific situation is likely to look like. To get your personalized estimate right now, use our Arizona solar savings calculator. For cost context, see what solar panels cost in Arizona.
How Arizona Solar Savings Are Calculated
Your solar savings come from two sources:
- Electricity you produce and consume yourself — each kWh your panels produce and you use directly saves you the retail rate (~$0.13–$0.15/kWh in AZ)
- Electricity you export to the grid — credited at your utility's net billing rate (APS: $0.068/kWh; SRP: $0.065/kWh; TEP: $0.057/kWh)
Over 25 years, two compounding effects increase your savings significantly:
- Rising electricity rates: Arizona rates increase approximately 3% per year. Electricity that costs $0.15/kWh today costs ~$0.30/kWh in 25 years. Your solar production offsets this at no additional cost.
- Panel longevity: Panels degrade only ~0.5% per year, so a system producing 13,200 kWh in year 1 still produces ~11,500 kWh in year 25.
25-Year Savings Scenarios by System Size
| System Size | Monthly Bill Offset | Year 1 Savings | 25-Year Total Savings | Net Cost After Credits |
|---|---|---|---|---|
| 5 kW | $85–$110 | ~$1,100 | ~$33,000 | ~$7,500 |
| 8 kW | $140–$180 | ~$1,780 | ~$54,000 | ~$11,900 |
| 10 kW | $170–$220 | ~$2,200 | ~$67,000 | ~$14,900 |
| 12 kW | $205–$265 | ~$2,650 | ~$80,000 | ~$17,900 |
| 15 kW | $255–$330 | ~$3,300 | ~$95,000 | ~$22,400 |
These figures assume: APS utility, full sun exposure, 30% federal ITC, $1,000 AZ state credit, 3%/yr electricity rate increase, 0.5%/yr panel degradation, cash purchase. Loan financing reduces 25-year net savings by the total interest paid.
How Your Utility Affects Savings
The utility you're on significantly affects your savings due to different buyback rates and rate structures:
| Utility | Export Rate | Retail Rate | 8 kW 25-Yr Savings (Est.) |
|---|---|---|---|
| APS | $0.068/kWh | ~$0.15/kWh | ~$54,000 |
| SRP | $0.065/kWh | ~$0.14/kWh | ~$49,000 |
| TEP (Tucson) | $0.057/kWh | ~$0.13/kWh | ~$44,000 |
APS customers generally see the strongest savings due to higher retail rates and better export credits. Tucson (TEP) customers see lower savings per kW but also have lower system costs and smaller recommended system sizes.
Calculate Your Personal Savings Estimate
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Run My Numbers →The Role of Electricity Rate Increases
One of the most powerful but least-discussed drivers of Arizona solar savings is electricity rate inflation. Arizona rates have historically increased 2–4% per year. At 3%/yr compound growth, here's how your "locked-in" solar savings grow:
| Year | Electricity Rate | Annual Savings (8 kW system) |
|---|---|---|
| Year 1 | $0.150/kWh | $1,780 |
| Year 5 | $0.174/kWh | ~$2,050 |
| Year 10 | $0.201/kWh | ~$2,360 |
| Year 15 | $0.233/kWh | ~$2,700 |
| Year 20 | $0.270/kWh | ~$3,070 |
| Year 25 | $0.313/kWh | ~$3,400 |
Cash vs Loan vs Lease: How Financing Affects Savings
How you pay for solar dramatically changes your 25-year net savings:
- Cash purchase: Maximum savings — all $54,000 (8 kW example) minus your net cost (~$11,900) = ~$42,100 net over 25 years
- Solar loan (5.99% APR, 20 yr): Monthly payment ~$84 vs ~$148/mo savings = cash-flow positive from day 1. 25-yr net savings after interest: ~$34,000
- Lease/PPA: No tax credits, escalating payments. 25-yr net savings typically $10,000–$20,000 — significantly less
For a detailed comparison, read our Arizona solar financing guide. For all available incentives that boost your savings, see our Arizona solar incentives guide.
Factors That Reduce Your Savings
Not every Arizona home achieves the maximum savings scenario. Factors that reduce savings include:
- Shading: Trees, chimneys, or neighboring structures can reduce production 10–25%
- Oversized system: Exporting more power than you consume means excess is credited at the low export rate
- TEP territory: Lower retail and export rates than APS/SRP
- High loan interest: A 10% APR solar loan can eliminate most of the savings advantage
- Moving within 5–7 years: You may not recapture the full value, though solar does increase resale price
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