Path-Q Solar

What should I do if the utility requires a system change before approving interconnection?

Answer

Ask for the utility's requirement in writing, have the installer revise the design and price, and compare the revised output, export limits, schedule, and warranty implications with the original proposal. Do not approve extra work until you understand who pays and whether the change is necessary for permission to operate.

Key points

  • Possible changes include reducing capacity, limiting exports, replacing inverters, adding protection, or upgrading service equipment.
  • The revised design should be resubmitted through the utility's formal process.
  • The contract should state whether utility-required changes are included, capped, or treated as a change order.

What it depends on

  • Written utility correction or study result
  • Technical reason for the required change
  • Installer's revised design and price
  • Contract change-order terms
  • Effect on production, exports, incentives, and schedule

Risks and trade-offs

  • A cheaper modification may reduce production or export value.
  • A design change can trigger new permitting, equipment, or incentive issues.
  • Proceeding without documented approval can leave the system unable to operate lawfully or as intended.

Information you may need

  • Utility's written requirement and deadline
  • Original and revised one-line design or system specifications
  • All additional costs and responsible party
  • Updated production and interconnection estimates

Your next step

What to do next

Request a written change-order proposal and revised interconnection submission, then verify the final design directly with the utility before authorizing the change.

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Some details may depend on your location, installer, utility, incentives, regulations, or specific property.

SQ00494