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Virginia Administrative Code
Title 20. Public Utilities And Telecommunications
Agency 5. State Corporation Commission
Chapter 314. Regulations Governing Interconnection of Small Electrical Generators and Storage
10/16/2021

20VAC5-314-39. Modification of the interconnection request.

A. As used in this chapter, "material modification" means a modification to machine data or equipment configuration or to the interconnection site of the SGF that has a material impact on the cost, timing, or design of any customer interconnection facilities or upgrades or that may adversely impact other interdependent interconnection requests with higher queue numbers. Material modifications include certain project revisions as defined in subsection B of this section, but exclude certain project revisions as defined in subsection C of this section.

B. Changes that qualify as material modifications are described as follows:

1. A change in point of interconnection to a new location, unless the change in a point of interconnection is on the same circuit less than two poles away from the original location, and the new point of interconnection is within the same protection zone as the original location;

2. A change or replacement of generating equipment, such as generators, inverters, transformers, relaying, or controls, that is not a like-kind substitution in size, ratings, impedances, efficiencies, or capabilities of the equipment specified in the original or preceding interconnection request;

3. A change from certified to noncertified devices ("Certified" means certified by an Occupational Safety and Health Administration recognized Nationally Recognized Test Laboratory, to relevant Underwriters Laboratories and Institute of Electrical and Electronics Engineers standards, authorized to perform tests to such standards.);

4. A change of transformer connections or grounding from that originally proposed;

5. A change to certified inverters with different specifications or different inverter control specifications or set-up than originally proposed;

6. An increase of the maximum generating capacity of an SGF; or

7. A change reducing the maximum generating capacity of the SGF (i) by more than 25% before the Feasibility Study Agreement or Combined Study Agreement has been executed or (ii) by more than 10% after the Feasibility Study Agreement or Combined Study Agreement has been executed.

C. Changes that do not qualify as material modifications are described as follows:

1. A change in ownership of an SGF; the new owner, however, will be required to execute a new Interconnection Request Form and study agreements for any study that has not been completed and the report issued by the utility;

2. A change or replacement of generating equipment, such as generators, inverters, solar panels, transformers, relaying, or controls, that is a like-kind substitution in size, ratings, impedances, efficiencies, or capabilities of the equipment specified in the original or preceding interconnection request;

3. An increase in the DC/AC ratio that does not increase the maximum AC output capability of the generating facility;

4. A decrease in the DC/AC ratio that does not reduce the AC output capability of the generating facility by more than the amount specified in subdivision B 7 of this section.

5. A change in the DC system configuration to include additional equipment that does not impact the maximum generating capacity, daily production profile, or the proposed AC configuration of the SGF or energy storage device, including DC optimizers, DC-DC converters, DC charge controllers, powerplant controllers, and energy storage devices such that the output is delivered during the same periods and with the same profile considered during the system impact study.

D. To the extent an IC proposes to modify any information provided in the interconnection request deemed complete by the utility, the IC shall submit any such modifications to the utility in writing. If the utility determines that the proposed modifications constitute a material modification, the utility shall notify the IC in writing within 10 business days that the modification is a material modification, and the interconnection request shall be withdrawn from the queue unless the IC withdraws the proposed material modification within 10 business days of receipt of the utility's written notification. If the modification is determined by the utility not to be a material modification, then the utility shall notify the IC in writing that the modification has been accepted and that the IC shall retain its queue number. An IC may seek an informal determination from the utility of whether a proposed modification constitutes a material modification in accordance with subdivision E of this section.

E. Modification inquiry.

1. Prior to making any modification, the IC may submit an informal modification inquiry in writing that requests the utility to evaluate whether the proposed modifications to the original or most recent interconnection request is a material modification. The IC shall provide specific details on all changes that are to be considered by the utility.

2. In response to IC's informal request, if the utility evaluates the proposed modifications and determines that the changes are not material modifications, the utility shall inform the IC in writing within 10 business days. If the IC wishes to proceed with the proposed modifications, the IC shall submit a revised Interconnection Request Form that reflects the approved modifications.

Statutory Authority

§§ 12.1-13 and 56-578 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 37, Issue 1, eff. October 15, 2020.

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