A solar + battery system configured for zero export can still require a PG&E interconnection process if it will operate in parallel with PG&E’s electric system.

The decision is not simply “export” vs “no paperwork.” The useful question is:

Which PG&E Rule 21 non-export operating mode and application path matches the actual system?

PG&E has a specific non-export interconnection category

PG&E’s current self-generation guidance says non-export interconnection is available to generator technologies and sizes when the project meets one of its listed non-export methods, such as approved reverse-power/under-power protection, qualifying non-islanding/incidental-export design, load-based sizing, or qualifying load-following controls. See PG&E Larger Self Generation: Non-export interconnection.

PG&E’s current Rule 21 tariff library also includes a Rule 21 Generator Interconnection Application (Form 79-1174-03) and Attachment B — Non-Export. Attachment B distinguishes parallel non-export operation, inadvertent export, uncompensated export, momentary parallel operation and isolated operation. See PG&E Tariffs.

That distinction matters because a battery inverter set to a consumer-facing “zero export” setting is not, by itself, enough information to classify the PG&E application.

Do not assume the notification-only form applies

PG&E also publishes Form 79-1212, Rule 21 Non-Export Generator Interconnection Notification. The published form lists specific eligibility conditions, including system-size/configuration limits, qualifying power-control behavior, service/meter conditions, non-network location and installation by an eligible developer previously approved by PG&E.

So a DIY homeowner should not assume that a small zero-export PV + battery project automatically qualifies for notification-only processing merely because it is under 30 kVA.

Ask PG&E EGI which path applies to the specific project before choosing the form.

What about the interconnection fee?

GridPermit cannot confirm one universal application-fee amount for every small residential zero-export PV + battery configuration from the project description alone.

PG&E’s current Rule 21 distinguishes fee treatment by generating-facility/interconnection category, and its application documents state that an applicable non-refundable Interconnection Request fee is invoiced unless an exemption applies. Certain non-NEM solar projects that do not sell power have different fee/study treatment under Rule 21.

The correct sequence is:

1. classify the project under the current Rule 21 path;
2. confirm whether that path is fee-exempt or fee-bearing;
3. obtain the current invoice/fee from PG&E for that application type;
4. only then use the dollar amount in the project budget.

Do not copy a fee from an old NEM application, another utility, or a Reddit comment.

Facts PG&E needs to classify a hybrid project

Have these ready before asking which form applies:

• service address and account;
• service voltage and meter type;
• PV DC size and inverter AC rating;
• battery kWh and inverter AC rating;
• inverter / PCS make and model;
• whether PV and battery share an inverter;
• proposed point of interconnection;
• exact export-control mode and certified control equipment;
• whether any export is possible, even temporarily/inadvertently;
• existing generation/storage at the site;
• whether the applicant/installer is a PG&E-approved eligible developer for any notification-only path;
• AHJ and local permit status.

Zero-export does not replace the local permit path

PG&E’s Rule 21 application materials explicitly note that other approvals, including local governmental building/planning approvals, may still be required. PG&E authorization does not substitute for the AHJ permit, and AHJ approval does not substitute for PG&E authorization to operate in parallel.

Best question to send PG&E EGI

Instead of asking only “What form do I use for zero export?”, send the project facts above and ask:

“For this specific PV + battery configuration, which current Rule 21 operating mode and interconnection application path applies, what fee/exemption applies to that path, and what documents are required for a complete submission?”

That reduces the risk of filing under the wrong program and then trying to infer fees or timelines from the wrong tariff category.

GridPermit is an educational permitting/interconnection guide, not PG&E or the local AHJ. PG&E forms and Rule 21 requirements can change. The first-party PG&E materials referenced here were reviewed September 9, 2026; confirm the current classification and fee with PG&E before submitting or operating the system.