Path-Q Solar

When is a preliminary desktop assessment insufficient before choosing a solar installer?

Answer

A desktop assessment is insufficient when important site conditions cannot be reliably verified remotely or when the quote depends on them. Request a physical assessment before choosing an installer if roof condition, structural capacity, shading, access, electrical equipment, or layout is uncertain.

Key points

  • Remote imagery may not reveal roof damage, obstructions, attic conditions, conduit routes, panel access, or service-equipment constraints.
  • A site visit is especially important for older, complex, steep, shaded, multi-roof, or recently modified properties.
  • Ask what was verified in person and what remains an assumption.

What it depends on

  • Roof age, geometry, and condition
  • Visibility of electrical equipment and proposed cable routes
  • The complexity and consequences of the proposed design assumptions

Risks and trade-offs

  • Choosing from desktop-only quotes may lead to redesigns, change orders, or installation delays.
  • A site visit adds time or a possible fee but can reduce uncertainty before contract signing.
  • A physical visit does not replace specialist structural or electrical review when those issues are outside the installer's scope.

Information you may need

  • The installer’s site-assessment checklist
  • Photos or records of the roof, attic, electrical service, and possible obstructions
  • A written list of assumptions and exclusions in the preliminary proposal

Your next step

What to do next

Ask each finalist to identify unverified assumptions and provide a quote based on a physical site assessment before you select an installer.

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