# COMAR 20.50.09.10: COMAR 20.50.09.10. Level 2 Review > Maryland · Regulations · In force URL: https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_10 ## Section - **Citation:** COMAR 20.50.09.10 - **Heading:** COMAR 20.50.09.10. Level 2 Review - **Jurisdiction:** Maryland - **Kind:** Regulations - **Status:** In force - **Text as of:** August 14, 2026 - **Source:** Compiled text - **Location:** Code of Maryland Regulations / Title 20 PUBLIC SERVICE COMMISSION / Subtitle 50 SERVICE SUPPLIED BY ELECTRIC COMPANIES / Chapter 09 Small Generator Facility Interconnection Standards / COMAR 20.50.09.10 ## Text r facility, in aggregation with other generation and energy storage devices on the distribution circuit, may not cause any distribution protective devices and equipment including substation breakers, fuse cutouts, and line reclosers, or other customer equipment on the electric distribution system to be exposed to fault currents exceeding 90 percent of the short circuit interrupting capability; and (c) The interconnection request may not request interconnection on a circuit that already exceeds 90 percent of the short circuit interrupting capability; (3) The proposed small generator facility's point of interconnection may not be on a transmission line; (4) When a small generator facility is to be connected to 3-phase, 3-wire primary utility distribution lines, a 3-phase or single-phase generator shall be connected phase-to-phase; (5) When a small generator facility is to be connected to 3-phase, 4-wire primary utility distribution lines, a 3-phase or single-phase generator will be connected line-to-neutral and will be effectively grounded; (6) When the proposed small generator facility is to be interconnected on single-phase shared secondary line, the aggregate generation on the shared secondary line, including the proposed small generator facility, may not exceed 20 kW; (7) When a proposed small generator facility is single-phase and is to be interconnected on a center tap neutral of a 240 volt service, its addition may not create an imbalance between the two sides of the 240 volt service of more than 20 percent of the nameplate rating of the service transformer; (8) A small generator facility, in aggregate with other generation and energy storage devices interconnected to the distribution side of a substation transformer feeding the circuit where the small generator facility proposes to interconnect, the aggregate generation may not exceed 10 MW in an area where there are known or posted transient stability limitations to generating units located in the general electrical vicinity; r days, offer to perform additional review to determine whether minor system modifications or a site-specific utility required inverter settings profile would enable the interconnection to be made consistent with safety, reliability, and power quality criteria; (b) Provide the applicant with a nonbinding, good faith estimate of the costs of the additional review and minor system modifications; and (c) Advise the applicant if a limited export customer agreement could be used to facilitate reliable and safe interconnection to the electric distribution system. (3) The utility shall undertake the additional review only if the applicant agrees within 10 business days to pay for the cost of the review, which may be extended at the request of the applicant. A request for extension may not be unreasonably denied by the utility. (4) If the review identifies the need for modifications to the distribution system, the utility shall make the necessary modifications only if the interconnection customer agrees to pay for the cost of the modifications. G. Interconnection Agreement. (1) When a utility determines that the interconnection request passes the Level 2 screening criteria, or fails one or more of the Level 2 screening criteria but determines that the small generator facility can be interconnected safely and reliably, the utility shall provide the applicant an interconnection agreement within 5 business days after the determination. (2) The applicant shall have either 30 calendar days, or another mutually agreeable time frame after receipt of the interconnection agreement, to sign and return the interconnection agreement. (3) If the applicant does not sign the interconnection agreement within 30 calendar days, the request shall be considered withdrawn unless the applicant and utility mutually agree to extend the time period for executing the interconnection agreement prior to the expiration of the 30-calendar-day calendar period. A request for extension may not be unreasonably denied by the utility. ## Nearby sections - [COMAR 20.50.09.01 COMAR 20.50.09.01. Scope](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_01.md) - [COMAR 20.50.09.02 COMAR 20.50.09.02. Definitions](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_02.md) - [COMAR 20.50.09.03 COMAR 20.50.09.03. Acceptable Standards](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_03.md) - [COMAR 20.50.09.04 COMAR 20.50.09.04. Interconnection Requests](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_04.md) - [COMAR 20.50.09.05 COMAR 20.50.09.05. Interconnection Request Processing Fees](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_05.md) - [COMAR 20.50.09.06 COMAR 20.50.09.06. General Requirements](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_06.md) - [COMAR 20.50.09.07 COMAR 20.50.09.07. Certified and Approved Equipment](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_07.md) - [COMAR 20.50.09.08 COMAR 20.50.09.08. Determination of Interconnection Jurisdiction and Level of Utility Review of Interconnection Request](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_08.md) - [COMAR 20.50.09.09 COMAR 20.50.09.09. Level 1 Review](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_09.md) - [COMAR 20.50.09.10 COMAR 20.50.09.10. Level 2 Review](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_10.md) - [COMAR 20.50.09.11 COMAR 20.50.09.11. Level 3 Review](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_11.md) - [COMAR 20.50.09.12 COMAR 20.50.09.12. Level 4 Study Review](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_12.md) - [COMAR 20.50.09.13 COMAR 20.50.09.13. Dispute Resolution](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_13.md) - [COMAR 20.50.09.14 COMAR 20.50.09.14. Record Retention and Reporting Requirements](https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_14.md) --- Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/STATE_MD_COMAR_20_50_09_10. Check the current official text before relying on it. Not legal advice.