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Does commercial solar work with Time-of-Use (TOU) utility rates?

TOU rates charge more for electricity during peak demand periods and less during off-peak hours.

UpdatedJune 2026
Read time4 min read
CategoryCommercial Rooftop Solar
Reviewed byGI Engineering
Clear answer

Clear answer, explained.

Commercial solar systems generate the most electricity during the day, which typically aligns with higher TOU rates. This allows businesses to offset expensive grid power with onsite solar generation, improving cost savings.


Key points

What this means in practice.

  • Solar generation aligns with daytime
  • TOU peak periods
  • Reduces electricity purchased at higher
  • TOU rates
  • Improves bill savings compared to flat-rate tariffs
  • Works best for businesses with daytime energy use

When this applies

Best-fit environments.

  • Commercial buildings billed under
  • TOU utility structures
  • Offices, retail, warehouses, and daytime operations
  • Grid-connected rooftop solar systems

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