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Is Solar Worth It in Duncanville, Texas?

We analyzed Oncor (transmission) rate books, NREL irradiance data, and Texas tax codes to calculate the real ROI for homeowners in 75116.

Market Snapshot

Elec. Rate
$0.14/kWh
Sun Hours
5.49
Utility Oncor (transmission)
Tax Exempt Yes
Battery Optional

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 Duncanville is $140.0.

For homeowners in Duncanville, average electric bills are climbing to around $140 a month. With the Texas grid managed by ERCOT showing vulnerability to extreme weather, generating your own power is about more than just savings—it's about energy security. Harnessing the ample sunshine in Dallas County is one of the most effective ways to lower your monthly costs and gain peace of mind.

Benchmark Cost Analysis

System Costs in Duncanville (Early 2026 Estimates)

When considering solar, you have two primary options. While a basic solar-only system looks cheaper upfront, adding a battery provides crucial backup power for ERCOT outages.

  • Solar-Only System: A standard 4 kW system costs around $11,500 before incentives. After the 30% federal tax credit, your net cost drops to approximately $8,050. This is a great starting point for offsetting your usage.
  • Solar + Battery System: For true energy independence, this is the recommended path. A 4 kW system paired with a 10 kWh battery runs about $23,500. The federal tax credit applies to both, bringing your net cost down to $16,450. This setup protects you from blackouts and maximizes self-consumption.

Incentives & Tax Credits

Available Solar Incentives for Dallas County

Texas provides powerful incentives that make going solar financially attractive. First and foremost is the federal Residential Clean Energy Credit, which immediately slashes 30% off your total system cost, including batteries. Additionally, Texas law provides a 100% property tax exemption, so adding thousands of dollars of value to your home won't increase your property taxes. Your system is also exempt from state sales tax, saving you hundreds more upfront.

Net Metering: Oncor (transmission)

Policy Status

No Statewide NEM

Battery Priority

Optional

Understanding Solar Buyback Plans in a Deregulated Market

Texas doesn't have a statewide net metering mandate. Your electricity is transmitted by Oncor, but you buy it from a Retail Electric Provider (REP). The key is to choose an REP that offers a competitive solar buyback plan. These plans purchase your excess solar energy, often at a rate slightly below retail. Pairing your system with a battery helps you store that excess energy to use yourself during evenings or cloudy days, making you less reliant on the specifics of any REP's plan.

Projected Savings

Your Potential Monthly and Lifetime Savings

Based on a local electricity rate of $0.14 per kWh, a 4 kW solar array in Duncanville can generate over 6,000 kWh per year. This production is estimated to save you around $853 annually, effectively cutting a significant portion of your bill. Over the 25-year warrantied life of the panels, that adds up to over $21,000 in savings, and that's before accounting for future rate hikes from local REPs.

Local Questions Answered

What happens during a power outage if I have solar panels?
With a solar-only system, your system will shut down during a grid outage to protect utility workers. This is why a battery is so critical in the ERCOT service area. With a solar and battery system, your home disconnects from the grid and runs on stored and incoming solar power, keeping your lights on.
How long does it take to pay off a solar system in Duncanville?
A solar-only system has a quicker payback period, estimated at around 9.5 years. A solar-plus-battery system takes longer to recoup the initial investment, around 19 years, but the immediate benefits of outage protection and energy security are invaluable for many Texas homeowners.
Will solar panels increase my Dallas County property taxes?
No. Texas state law provides a 100% property tax exemption for the value added by a residential solar energy system. Your home's value will increase, but your tax bill will not.

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* Calculations based on Oncor (transmission) residential rates (0.14/kWh).

Data Transparency & Methodology

Estimates for Duncanville, Texas 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.