Path-Q Solar
What information is needed to determine whether a zero-export solar system is allowed?
Answer
You need the utility's interconnection rules, the site's service and load information, the proposed equipment and control design, and any applicable electrical or building requirements. A zero-export system is not automatically exempt from review; the utility must confirm whether the control method is acceptable.
Key points
- The utility may require certified inverters, export-control equipment, testing, or monitoring.
- The design must prevent unintended export under normal and fault conditions as required by the utility.
- Battery charging and load-management behavior can affect whether zero export is maintained.
- Local permits and inspections may still be required.
What it depends on
- Utility rules for non-export or export-limited systems
- Service configuration and minimum site load
- Inverter, battery, meter, and control capabilities
- Applicable electrical, building, and safety requirements
Risks and trade-offs
- Control failure can cause unauthorized export or disconnection.
- A zero-export design may curtail solar and reduce savings.
- Equipment and testing requirements can add cost and schedule risk.
Information you may need
- Utility account and service details
- One-line diagram and equipment certifications
- Load data and proposed control sequence
- Current utility application and inspection requirements
Your next step
What to do next
Send the proposed one-line diagram and equipment list to the utility and request written confirmation of the non-export interconnection path.
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Some details may depend on your location, installer, utility, incentives, regulations, or specific property.
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