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Pasadena Water & Power

  • Interconnection Rules and Process

    The parallel operation of a self-generation unit, such as a solar PV system, requires interconnection with PWP's electric distribution system. Electric Regulation 23 is the guidelines that describe the interconnection, operating and metering requirements for generation facilities to be connected to PWP’s distribution system. In addition, customers must comply with Pasadena’s Regulation 21 rules, regulations, and policies for electrical design, installation, upgrades, equipment maintenance, and safety electric service.


    Interconnection Process for PSI Solar Installations

    *NOTE: unlike the investor-owned utilities, PWP's Interconnection Process is integrated throughout the Pasadena Solar Initiative ("PSI") rebate process. There is no separate interconnection application or process. Please read through the entire PSI Incentive Process section to find detailed interconnection information.

    The interconnection process for solar installations under the PSI may be summarized as follows:

    • For systems up 15 kW AC-CEC, submit in PowerClerk a pdf signed copy of the Small Solar Generator Interconnection Agreement.
    • For systems larger than 15 kW AC-CEC, mail to PWP Two (2) original signed (wet signature) Interconnection and Metering Agreement (both copies must have original signature from customer)
    • Engineering will review and approve the interconnection prior to PWP issuing a rebate reservation confirmation letter
    • After system installation and all documentation have been completed and the customer submits the Incentive Payment Request Form, PWP will replace the old utility meter with a new Net Meter capable of spinning and recording net energy in both directions.
    • As soon as new utility meter is installed, PWP will send a "Permission to Operate" (PTO) letter indicating that the interconnection has been approved and the customer is authorized to turn the solar system on. Note: It is the responsibility of the installer to turn the solar system on.


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