Decommissioning: Who Cleans Up When the Lease Ends

The single biggest long-term risk in a commercial solar lease is what happens if the company that built the array isn't around, or isn't solvent, when the project ends.

If a solar developer goes out of business decades into a lease, what stops thousands of panels from sitting on your land indefinitely? This is the "abandonment" scenario, and it's the reason decommissioning terms deserve as much attention as the payment terms.

In Oklahoma, this baseline is already addressed by state law (17 O.S. § 820.5), which requires commercial solar developers to provide financial assurance for decommissioning. Landowners in other states should confirm what, if anything, their state requires as a floor — and either way, an individual lease should spell out more than the statutory minimum:

• Financial assurance. Not a loose promise to clean up — a letter of credit, a performance bond, or a parent-company guaranty with an investment-grade credit rating, so there's an actual pot of money to draw from.
• Independent cost estimates. The projected cost of removing the equipment and restoring the land should be calculated by an independent, licensed professional engineer — and re-evaluated periodically to keep pace with inflation, since a cost estimate from year one of a forty-year lease won't reflect reality by year thirty.
• What "restoration" actually means. The contract should specify removal of concrete footings and buried infrastructure, and returning the land to a tillable condition — not just "removing the panels."

This is also where mineral rights matter. Under Oklahoma law, the mineral estate is considered legally "dominant," meaning a mineral owner or their lessee generally has an implied right to use the surface as reasonably necessary to develop what's underground. If a well needs to be drilled in the middle of an existing solar array decades into a lease, that's a conflict the lease should anticipate in writing — not leave to chance.

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