Path-Q Solar

Should I wait to install solar until my home electrification plans are finalized?

Answer

If electrification plans are likely and will materially increase electricity use, finalize the main load assumptions before sizing solar when practical. If timing is uncertain, obtain designs for both current and future loads rather than automatically waiting.

Key points

  • Heat pumps, electric water heating, cooking, vehicles, and other loads can change annual and seasonal demand.
  • The physical roof and electrical design may need to accommodate future equipment even if all loads are not installed immediately.
  • A staged approach may be possible, but compatibility and future expansion should be confirmed.

What it depends on

  • Type and timing of planned electrification
  • Expected energy and peak demand
  • Roof and electrical capacity
  • Ability to expand the system later

Risks and trade-offs

  • Installing too small a system may require later changes or leave future loads uncovered.
  • Waiting delays potential benefits and may not be necessary if future loads can be incorporated now.
  • Future usage estimates are uncertain and can lead to oversizing.

Information you may need

  • Planned appliances and vehicle charging
  • Expected installation dates
  • Current and projected bills
  • Installer assessment of expansion and electrical capacity

Your next step

What to do next

Ask installers to model current-load and future-load designs, including what must be decided now to avoid costly changes later.

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