Path-Q Solar

What risk exists if a solar contract allows equipment substitutions without approval?

Answer

The installer could replace specified equipment with a different model or component that changes performance, compatibility, warranty coverage, appearance, or safety without your consent.

Key points

  • Require substitutions to be equivalent or better for documented capacity, efficiency, compatibility, certifications, warranty, and physical dimensions.
  • Require written approval before substitution and an updated quote, design, and equipment list.
  • Confirm that a substitution does not affect interconnection approval, incentives, monitoring, or insurance.

What it depends on

  • The contract's substitution language
  • The specified equipment and its warranties
  • Whether approvals or incentives depend on listed equipment

Risks and trade-offs

  • A cheaper or less suitable substitute may reduce expected output or serviceability.
  • A different component may create compatibility problems or void another manufacturer's warranty.
  • Refusing every substitution can delay work when a specified model is unavailable.

Information you may need

  • The complete equipment schedule and model numbers
  • The proposed approval process and equivalency standard
  • Any linked interconnection, incentive, or financing requirements

Your next step

What to do next

Ask the installer to revise the contract so that material substitutions require your prior written approval and document the comparison before installation.

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SQ02103