Path-Q Solar
When should I request a preliminary utility interconnection review before paying for a detailed solar design?
Answer
Request preliminary interconnection screening early when the proposed system may be large relative to the service, includes batteries or export controls, serves a complex property, or could face capacity, voltage, transformer, or feeder constraints. It is especially useful before paying for a design whose size or export arrangement may need to change, but it does not replace the utility's formal application or approval.
Key points
- Provide an approximate system size, service information, site address, expected export behavior, and battery details if known.
- Ask what screening is available, what it costs, what information it requires, and whether it is binding.
- A preliminary response may identify likely studies, upgrades, export limits, or design constraints.
- Confirm whether the utility permits non-export, limited-export, or phased designs.
What it depends on
- Utility interconnection process and screening criteria
- Existing service capacity and electrical configuration
- Proposed generation, storage, and export controls
- Local network capacity and required studies
Risks and trade-offs
- A preliminary review may be informal and may not reserve capacity or guarantee approval.
- Waiting for screening can slow the project, while skipping it can create redesign or application costs.
- A smaller or non-export design may improve feasibility but change expected savings and operating value.
Information you may need
- Utility account and service details
- Approximate solar and battery size
- Single-line or existing electrical information if available
- Proposed export mode and project timeline
Your next step
What to do next
Contact the utility or interconnection portal before commissioning a detailed design and ask for the available preliminary screening, its limitations, and the formal application path.
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Some details may depend on your location, installer, utility, incentives, regulations, or specific property.
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