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Is Solar Worth It in Marana, Arizona?

We analyzed Tucson Electric Power (TEP) rate books, NREL irradiance data, and Arizona tax codes to calculate the real ROI for homeowners in 85653.

Market Snapshot

Elec. Rate
$0.135/kWh
Sun Hours
6.59
Utility Tucson Electric Power (TEP)
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 Marana 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.

With over 300 days of sunshine pouring down on the Sonoran Desert, solar panels in Marana are a natural fit. But with Tucson Electric Power's (TEP) current rate structures, simply installing panels isn't enough. To truly slash your high summer AC bills, pairing solar with a battery backup system is the new standard for maximizing savings and energy independence in 2026.

Benchmark Cost Analysis

System Costs in Marana (Solar + Battery Recommended)

Under TEP's net billing policy, a solar-only system is no longer the best financial choice. Here’s a realistic look at the costs for a system designed to give you real savings:

  • Gross Cost (Solar + Battery): Around $23,500
  • After All Incentives: Approximately $15,450
  • Estimated Payback Period: 16-17 years

While a solar-only system might look tempting at just $7,050 after credits, its annual savings are cut by nearly 30% because of the low price TEP pays for your excess solar power. A battery solves this by storing your energy for you to use during expensive peak hours.

Incentives & Tax Credits

Arizona Solar Incentives for 2026

Marana homeowners can take advantage of powerful incentives that significantly reduce the upfront cost of a solar and battery installation:

  • Federal Solar Tax Credit: A 30% credit on your entire system cost (panels, battery, and installation). For a $23,500 system, this is a $7,050 credit on your federal taxes.
  • Arizona State Tax Credit: A one-time credit of up to $1,000.
  • Tax Exemptions: Your solar system is 100% exempt from both state sales tax and property tax, meaning your home's value increases without raising your tax bill.

Net Metering: Tucson Electric Power (TEP)

Policy Status

Net Billing (2024)

Battery Priority

Critical 🔋

Understanding TEP's Net Billing Policy

This is the most critical factor for going solar in Arizona today. Under TEP's 'Net Billing' plan (also called Resource Comparison Proxy), the value of the excess electricity you send back to the grid is drastically lower than the retail rate you pay. You might sell your extra power for ~7¢/kWh but have to buy it back later that evening for 13.5¢/kWh or more. A battery breaks this cycle, letting you store your extra daytime solar power and use it yourself at night, avoiding the unfavorable exchange with TEP entirely.

Projected Savings

How Much Can You Save Monthly in Marana?

A properly sized solar and battery system allows you to self-consume your own clean energy, dramatically reducing what you pull from TEP's grid. With an average electric bill around $155, homeowners with a solar and battery system can expect to save around $900 annually, or about $75 per month on average. Savings are highest during the brutal summer months when AC usage skyrockets.

Local Questions Answered

Is a battery absolutely necessary for solar in Marana?
Financially, yes. To get a strong return on investment under TEP's net billing rates, a battery is essential. It lets you use 100% of the power you generate, which is far more valuable than the low credit TEP offers for your exported energy.
How do solar panels hold up to Marana's monsoon season?
Modern solar panels are built to withstand severe weather, including the high winds and hail common during monsoon season. They are typically rated to handle winds up to 140 mph and are a durable, long-term investment for your home.
Does the extreme summer heat reduce panel efficiency?
Yes, all electronics lose some efficiency in extreme heat. However, panels are tested and rated for these conditions. While a panel might be slightly less efficient on a 110°F day compared to an 80°F day, the sheer intensity of Arizona sun means your overall annual production is among the highest in the country.

Calculate Your Solar Savings

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* Calculations based on Tucson Electric Power (TEP) residential rates (0.135/kWh).

Data Transparency & Methodology

Estimates for Marana, 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.