Interconnection Documents

Answer: Interconnection documents are the project records a utility or network operator requires to review and authorize a generating facility’s grid connection. They can include application data, electrical drawings, equipment evidence, customer authorization and completion records. The required package depends on the current process and project configuration. A complete submission supports review; it does not by itself prove approval or permission to operate.

Start with the operator’s current requirements

Identify the serving utility/network operator, account/site, applicable program or tariff, connection voltage, technology, existing generation and proposed export mode. Download the current official checklist or use the prescribed portal. Record its revision and retrieval date.

PG&E’s Electric Generation Interconnection page, for example, distinguishes application pathways and explains that missing information can result in an accepted but incomplete request, followed by a written deficiency list. This named operator’s process should not be generalized into a universal deadline, fee or review-clock rule.

A working document register

The following categories help organize a project. Obtain the actual required attachments from the operator; not every project requires every row.

A datasheet alone is not necessarily certification evidence. Check the exact model and applicable requirements rather than assuming every component must appear on one California list or that a generic “IEEE compliant” description resolves acceptance.

For an actual local example, PG&E’s contractor resources emphasize correct account information, customer authorization, agreement pages and final inspection records. Confirm which program the guidance applies to; historic NEM requirements are not automatically the right package for a new application.

Consistency checks before submission

Use one controlled design revision across the application, electrical SLD, layout and equipment schedule. Check identifiers, model suffixes, module count, inverter count, ratings, phase/service arrangement, connection point and export settings. Include existing equipment where the application requests it.

In a hypothetical project, 20 modules at 450 W total 20 × 450 = 9,000 W = 9 kW DC. A 7.6 kW AC inverter and a proposed 5 kW export limit are separate values. Do not put “9 kW” in every capacity field or treat proposed export control as an approved limit. The example verifies arithmetic only, not electrical design or utility eligibility.

Confirm units and requested rating conventions in the form. An application field may require a particular inverter rating or aggregate capacity calculation; use its instructions rather than guessing from a generic calculator.

Copy-ready submission control

Maintain requirement / source and revision / file and design revision / owner / status / review comment / due event for each item. Status should distinguish not required, missing, prepared, submitted, accepted and superseded.

A practical workflow is:

1. Assign responsibility: confirm who drafts, reviews, signs and submits each item.
2. Review consistency: reconcile equipment and configuration across all records before uploading.
3. Submit the required format: follow the actual portal’s file, signature and naming requirements.
4. Retain receipt: save the application/reference number, exact submitted files and confirmation.
5. Resolve deficiencies: answer each stated issue, reference the affected file and retain the correction history. Determine whether the operator requires replacement files or an amendment.
6. Track final conditions: collect the required completion evidence and operating authorization rather than treating an initial review response as the end of the process.

For a hypothetical correction, a drawing lists inverter model A while the equipment evidence covers model B. The reviewer should establish the intended installed model, update all affected records and obtain any required revised review. Attaching both datasheets without resolving the mismatch leaves the design ambiguous.

Utility review versus permitting

The interconnection agreement governs the grid-connection relationship. A permit package supports the relevant permitting authority’s review. They may share drawings but have different recipients, purposes and release conditions. One accepted package does not automatically satisfy the other process.

Do not promise that construction can always begin while utility review is pending. Check the required sequence, local permits and contract conditions. Qualified personnel must follow the required authorization and approved procedures before energization or parallel-operation tests.

Designers should maintain traceable equipment and drawing revisions. Installers should document the accepted configuration and field changes. Sales teams should explain outstanding tasks with a responsible owner rather than infer a guaranteed PTO date. Verify any software-generated deliverables against the actual checklist; automation does not certify the package or guarantee acceptance.

Frequently asked questions

Which documents are mandatory?

Use the current operator’s checklist and project-specific instructions. The categories above organize review but are not a universal mandatory list.

Does a complete upload mean approval?

No. A receipt, completeness decision, technical acceptance and operating authorization can be different statuses. Retain the actual decision and conditions.

Must every drawing be professionally stamped?

Check the applicable authority, jurisdiction and project requirements. No universal size-based stamping rule is established by this glossary definition.

What should happen after a design change?

Reconcile affected files, record the revision and obtain whatever amended review or authorization the operator and permitting authority require.