Change Order

A change order is a formal modification to an existing solar installation contract that adjusts the project scope, equipment, cost, or timeline after the original agreement has been signed. Change orders are common in construction projects and may arise during any phase of a solar installation.

Common reasons for change orders in residential solar include: roof condition issues discovered during installation (requiring repairs before mounting panels), electrical panel upgrades needed to accommodate the solar connection (the 120% rule), structural reinforcement requirements identified during engineering review, changes in panel or inverter models due to supply chain availability, adjustments to system size or layout based on updated site survey findings, or homeowner-requested modifications. A legitimate change order should be documented in writing, clearly describe the change, explain why it’s necessary, state the cost impact (increase or decrease), and be signed by both parties before the additional work begins. Be cautious of installers who issue frequent or large change orders after offering a low initial quote — this practice, called “low-balling,” can significantly inflate the final cost. A thorough site survey before contract signing minimizes the likelihood of unexpected change orders.