Solar Panel Roof Cost vs Ground Mount: Which Is Cheaper?

Is There Still a Federal Solar Tax Credit in 2026?

For most homeowners buying a system in 2026, no. The One Big Beautiful Bill Act, signed July 4, 2025, ended the 30% residential clean energy credit (Section 25D) for expenditures made after December 31, 2025. Tax practitioners and the IRS read this to mean the installation must have been completed by that date (Solar Power World; IRS).

What still applies:

• Systems completed by December 31, 2025 qualify for the full 30% credit, claimed on IRS Form 5695. Unused credit can carry forward to later tax years.
• Leased or PPA systems are owned by a company that can claim the business credit (Section 48E), subject to construction-start and placed-in-service deadlines and foreign-sourcing rules. Whether savings reach you depends on the provider’s contract.
• State, local, and utility incentives vary widely. Check the DSIRE database and our state pages for your location. Some site-work items, such as trenching for a ground mount, may be ineligible for certain rebates, so confirm with your installer.

Because the federal credit no longer reduces either option, the cost comparison below uses prices before incentives, which are now the baseline for buyers in most of the U.S.

Does Ground-Mounted Solar Produce More Energy?

Often, yes, though how much depends on your roof. Output per kilowatt is where ground mounts can recover part of their higher price.

• Ideal tilt and direction. Installers can set a ground array to the best angle and orientation for your latitude instead of working with whatever your roof offers.
• Less shading. Arrays can be sited away from trees and chimneys.
• Cooler operation. Open airflow around the panels helps limit heat losses, because panel output falls as temperature rises.
• Easier upkeep. Snow, dust, and debris are easier to clear from panels at ground level.
• Trackers. EnergySage reports tracking systems can increase production by 25% or more.

There is no single national figure for how much more a ground mount produces, because it depends on your roof’s orientation and shading versus the yard’s. The chart below tests three hypothetical scenarios to show how much extra output would be needed to offset the roughly $3,600 premium on a 10 kW system.

Chart summary: Under these assumptions, a ground mount producing 5% more electricity earns back about $3,719 over 25 years, barely covering the $3,600 premium in year 25. At 10% more output, the premium is covered in about year 15 (about $7,400 over 25 years). At 15% more output, it is covered in about year 11 (about $11,200 over 25 years). If your roof is already well-oriented and unshaded, expect the low end.

You can test your own rate and production with the solar payback calculator.

Rooftop vs Ground Mount: Which Has the Better ROI?

For most homeowners with a good roof, rooftop solar has the better return. It costs less per watt, is simpler to finance, and typically avoids extra zoning steps. EnergySage’s own guidance is to choose rooftop solar when the roof works for solar and can fit the system you need.

To see why price matters so much now that the federal credit is gone, take a 10 kW rooftop system at the 2026 average price of about $26,000. At 12,000 kWh per year and 17¢ per kWh, annual savings are about $2,040, so simple payback is roughly 12.7 years before rate increases (this is a worked example, not a quote). Your payback will be faster in high-rate states such as Massachusetts and slower where power is cheap.

A ground mount is worth modeling when:

• your roof is shaded, faces mostly north, or has multiple obstructions;
• the roof is too small for the system size you need (for example, with heat pumps or EVs);
• the roof needs major work before solar can go on;
• you have open, sunny, stable land with room for setbacks.

Larger systems also spread fixed ground-mount costs such as trenching over more panels, and EnergySage notes ground mounts are usually easier for installers to scale up. Compare itemized quotes for both options, then run your numbers through the solar ROI calculator and the net metering calculator, since your utility’s export rate can change the answer. For a broader view, read are solar panels worth it.