Path-Q Solar

How can I compare solar quotes that recommend different system sizes?

Answer

Normalize each quote using annual production, monthly output, self-consumption, export value, equipment, roof layout, degradation, total installed cost, warranties, and future-load assumptions.

Key points

  • A larger system is not automatically better.
  • Compare cost per expected kWh and expected bill impact.
  • Require the same load and tariff assumptions.

What it depends on

  • Production models
  • Utility tariff
  • System scope and future loads

Risks and trade-offs

  • Different modeling assumptions can make quotes appear incomparable.
  • A smaller system may leave future needs unmet.

Information you may need

  • Detailed layouts
  • Annual and monthly output
  • Itemized prices and assumptions

Your next step

What to do next

Ask each installer to restate the design using a common load profile and provide a side-by-side production estimate.

Path-Q

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