Path-Q Solar

Which electricity bill details should I gather before speaking with an installer?

Answer

Gather about a year's bills if available, including usage by billing period, billing dates, rate or tariff structure, fixed charges, demand or time-based charges where applicable, and any export or credit information.

Key points

  • The installer needs energy consumption, not just the total amount paid.
  • Seasonal usage helps size a system and identify future load changes.
  • Keep bills showing meter identifiers and account details, but redact unnecessary personal information when sharing.

What it depends on

  • Bill format and available history
  • Rate structure
  • Seasonal consumption
  • Planned changes in electricity use

Risks and trade-offs

  • A single bill can misrepresent annual demand.
  • A system sized only to current use may be inadequate after electrification or business changes.
  • Bill credits or export treatment may not be represented consistently across periods.

Information you may need

  • Monthly or interval usage
  • Rate and charge components
  • Peak or demand information if shown
  • Planned changes to the property or loads

Your next step

What to do next

Collect and organize the most recent complete billing history, then ask the installer to state which bill assumptions were used in the design.

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