SunCents Logo SunCents

Is Solar Worth It in Maricopa, Arizona?

We analyzed Electrical District No. 3 (ED3) rate books, NREL irradiance data, and Arizona tax codes to calculate the real ROI for homeowners in 85138.

Market Snapshot

Elec. Rate
$0.135/kWh
Sun Hours
6.54
Utility Electrical District No. 3 (ED3)
Tax Exempt Yes
Battery Required

Analyst Note: The "4kW Benchmark"

The analysis below uses a standardized 4kW system to provide a fair baseline comparison across cities. However, the average electric bill in Maricopa is $155.25.

⚠️ Most homes here will need a larger system (8kW–12kW) to reach 100% offset. Use the calculator below for your exact numbers.

Explosive growth in Maricopa means more homes relying on a strained electric grid, leading to punishingly high bills, especially from May to September. Is installing a rooftop solar system the answer in 2026? With the right setup, it absolutely is. The key isn't just generating your own power—it's storing it to use when you need it most.

Benchmark Cost Analysis

2026 Solar & Battery System Costs in Maricopa

To unlock those $890+ annual savings, you'll need to invest in a combined solar and battery system. Here's what the investment looks like:

  • Typical Gross System Cost: Around $23,500
  • Federal & State Credits Applied: The price drops to approximately $15,450
  • System Payback Timeline: About 17 years, after which you enjoy decades of nearly free power.

Incentives & Tax Credits

Major Tax Credits Available Today

The financial picture is made much stronger by a combination of state and federal incentives:

  • Federal ITC (30%): This powerful credit reduces your federal tax liability by 30% of the total system cost. For a $23,500 system, that's a direct $7,050 credit.
  • Arizona State Credit ($1,000): Arizona offers its own tax credit of up to $1,000 for residential solar installations.
  • Zero Sales & Property Tax: You pay no sales tax on the purchase of your system, and it won't increase your property taxes, despite adding significant value to your home.

Net Metering: Electrical District No. 3 (ED3)

Policy Status

Net Billing (2024)

Battery Priority

Critical 🔋

Why You Need a Battery: Arizona's Net Billing Rules

Getting those impressive savings depends on adding a battery. Arizona utilities, including UNS, have moved to 'Net Billing'. This means they only pay you a low wholesale rate (around 6-8¢ per kWh) for any surplus solar energy you send to the grid. Because you pay a much higher retail rate (around 13.5¢ per kWh) to pull power back, a solar-only system leaves significant savings on the table. Adding a battery ensures you store and use every valuable kilowatt-hour you produce, maximizing your return on investment.

Projected Savings

Your Potential Annual Savings with Solar

A correctly sized solar and battery system in Maricopa can dramatically lower your reliance on your utility provider. Based on a typical monthly consumption of 1,150 kWh, you could see annual savings of around $890. This system allows you to power your home through the evening with stored solar energy, rather than buying expensive power from the grid after the sun sets.

Local Questions Answered

What happens if I sell my home before the system is paid off?
Solar systems are a major asset. Studies consistently show that homes with solar and battery backup sell faster and for a premium compared to similar homes without. The investment is typically transferred to the new homeowner, who inherits the energy savings.
How long does a solar battery last?
Most modern lithium-ion solar batteries, like the Tesla Powerwall or Enphase IQ Battery, come with a 10 to 15-year warranty. They are designed for daily cycling and will provide reliable energy storage for years to come.
My utility is ED3, not UniSource. Does this change things?
Yes, the specifics can vary. While all Arizona utilities follow some form of net billing, the exact export rates and time-of-use plans can differ. It's crucial to get a proposal based on your specific utility. Our calculator can help start that process.

Calculate Your Solar Savings

Enter your details below for a personalized estimate

Initializing Solar Engine...

* Calculations based on Electrical District No. 3 (ED3) residential rates (0.135/kWh).

Data Transparency & Methodology

Estimates for Maricopa, Arizona are produced by the SunCents Solar Engine (v1.2). We combine the following verified or standard industry sources:

Performance (PV production)

NREL PVWatts — modeled annual and hourly AC output (kWh), solar radiation, and system losses for a standardized array size so cities can be compared fairly.

nrel.gov

Electricity rates (tariffs)

U.S. Energy Information Administration (EIA) — state-level average retail electricity prices ($/kWh) and supporting series for economic context.

eia.gov

Incentives & programs

DSIRE — state and local rebates, net metering, and policy programs (summarized for readability; always confirm eligibility with a tax or solar professional).

dsireusa.org

Federal tax credit (ITC)

Investment Tax Credit — federal residential solar credit (e.g. 30% of qualified costs where applicable); rules change with statute—verify with a qualified advisor.

energy.gov

Utilities & interconnection

Where shown, local utilities (e.g. APS, PG&E, FPL, and other IOUs or munis) are mapped from public interconnection, tariff, or service-territory references so net metering and rider rules match your area—not generic national averages.