Path-Q Solar
How can I determine whether a larger solar system is eligible for interconnection under the utility's export limits?
Answer
Determine the utility's applicable export limit, screening method, and study requirements, then compare the proposed system's maximum export at the point of interconnection with that limit. Only the utility or authorized interconnection process can confirm final eligibility and any required upgrades or controls.
Key points
- The relevant limit may depend on inverter output, export-control settings, service capacity, feeder conditions, or the utility's study results.
- A larger array with storage or export controls may be treated differently from an unrestricted system.
- Review equipment certification, one-line diagrams, site load, and proposed operating mode.
- Obtain written approval before assuming the system can export its full potential.
What it depends on
- Utility interconnection rules and service characteristics
- System and inverter size
- Export-control and storage configuration
- Utility screening, study, and upgrade requirements
Risks and trade-offs
- A larger system may require costly upgrades, curtailment, or export-limiting equipment.
- A design that passes under controlled export may produce less value than its nameplate capacity suggests.
- Interconnection approval can change project timing and economics.
Information you may need
- Current utility interconnection requirements
- Proposed one-line diagram and equipment specifications
- Service capacity and historical load
- Export limit, study result, and upgrade estimate
Your next step
What to do next
Submit a complete preliminary interconnection package to the utility or authorized provider and request written confirmation of allowable export and required upgrades.
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Some details may depend on your location, installer, utility, incentives, regulations, or specific property.
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