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SESK: Stuff Everyone Should Know · sesk.info/solar-ca-net-billing-start

California's net billing tariff applies to rooftop solar customers who apply to connect on or after what date?

April 15, 2023, for interconnection applications from that date on.

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  1. April 15, 2023 ✔
  2. January 1, 2020
  3. July 1, 2026

Why: CPUC's net billing tariff succeeded NEM 2.0 for interconnection applications submitted on or after April 15, 2023. Exports earn credits based on their value to the grid instead of the full retail rate.

Huh, didn't know that: The same CPUC decision let new rooftop systems be sized to cover up to 150% of a customer's electricity use.

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References

Answer: April 15, 2023. CPUC's net billing tariff succeeded NEM 2.0 for interconnection applications submitted on or after April 15, 2023. Exports earn credits based on their value to the grid instead of the full retail rate.

  1. CPUC: Net Billing Tariff www.cpuc.ca.gov/nbt
    The NBT will apply to customers who submit an interconnection application on or after April 15, 2023.
    Checked 2026-10-10.
  2. CPUC: CPUC Modernizes Solar Tariff To Support Reliability and Decarbonization (Dec 15, 2022) www.cpuc.ca.gov/news-and-updates/all-news/cpuc-modernizes-solar-tariff-to-support-reliability-and-decarbonization
    The decision has no impact on existing rooftop solar customers, maintaining their current compensation rates.
    Checked 2026-10-10.

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