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District of ColumbiaDistrict of Columbia interconnection applications
1 electric utilities serve District of Columbia (EIA-861, 2025): 1 investor-owned utility. Together they serve 324,763 residential customers; 21,479 residential customers were on net metering at year-end 2025.
Largest utilities in District of Columbia
Investor-owned utility · 883,572 residential customers · District of Columbia
Applications: Own online portal – Connect the Grid Interconnection Portal (Green Power Connection)
Interconnection process and documents →Export compensation among the researched District of Columbia utilities: NEM. Rules differ by utility – see each utility page.
District of Columbia interconnection rule
Public Service Commission of the District of Columbia (DC PSC)
Interconnection rule15 DCMR Chapter 40 (§§ 4000-4099), District of Columbia Small Generator Interconnection Rules (DCSGIR) – District of Columbia Small Generator Interconnection Rules · source
Applies toSmall generator facilities <= 20 MW, not subject to PJM interconnection requirements, operating in parallel with the distribution system of the Electric Distribution Company (EDC). Pepco is the only EDC in DC.
Application formStatewide standard Interconnection Request form approved by the Commission (Part I application, Part II Certificate of Completion), submitted to the EDC; EDC must accept electronic submissions and e-signatures (4001.1-4001.4).
TimelinesLevel 1: completeness 5 BD; screening/Approval to Install 5 BD after complete; EDC-executed Interconnection Agreement within 3 BD of approval; Part II Certificate of Completion (with signed inspection certificate) due within 6 months; optional Witness Test within 10 BD (deemed waived otherwise); Authorization to Operate within 20 BD of complete Part II (4004.3). Pre-Application Report within 10 BD ($300). Supplemental Review 4011; Applicant Options Meeting 4012.
FeesFees determined by the Commission, posted on the EDC website and in tariffs; no application fee for Level 1 (4001.2). Pre-Application Report $300 non-refundable (4003.2).
External disconnectFacilities must be capable of isolation: on secondary lines a lockable isolation device whose status is clearly indicated and accessible by the EDC; on primary lines a lockable, visible-break device; customer-owned, between facility and PCC; lockbox option for inaccessible locations (4008.10-4008.11).
Export compensationNEM – D.C. Code §§ 34-1501, 34-1518; 15 DCMR Chapter 9 (Net Energy Metering and Community Net Metering)
Eligible customer-generator capacity not more than 1,000 kW (D.C. Code § 34-1501(15)); community renewable energy facilities (CREF) up to 5 MW per secondary summaries. Pepco offers PSC-approved standard net metering contract.
No municipal utilities or cooperatives in DC; Pepco is the sole EDC.
| Level | Up to | Criteria / review / fee |
|---|---|---|
| Level 1 (4004) | 20 kW | Inverter-based, nameplate <= 20 kW; screens incl. line-section minimum load / 15% of peak, shared secondary <= 20 kW, no utility construction other than metering · Completeness 5 business days; screening result/Approval to Install 5 business days after complete; executed agreement within 3 business days · No application fee (4001.2) |
| Level 2 (4005) | 5000 kW | Nameplate limits by line voltage: <4 kV <1 MW (<2 MW if on >=600 A line within 2.5 mi of substation); 4.1-14 kV <2 MW (<3 MW); 15-30 kV <3 MW (<4 MW); 31-60 kV <4 MW (<5 MW); plus adverse-impact screens · Completeness 5 business days; screen results 15 business days after complete · Set by Commission, in EDC tariff |
| Level 3 (4006) | 20000 kW | Non-exporting (reverse power / minimum import relays), <= 20 MW, not on spot/area network; reviewed with Level 2 procedures · Set by Commission, in EDC tariff |
| Level 4 (4007) | 20000 kW | Requests not qualifying for or not approved under Levels 1-3; scoping meeting and feasibility/impact/facilities studies · Completeness 5 business days; scoping meeting within 10 business days · Set by Commission, in EDC tariff; study costs |
- 15 DCMR Chapter 40 compiled (DC PSC): https://dcpsc.org/getattachment/Orders-and-Regulations/Orders-Rules-and-Regulations/District-of-Columbia-Municipal-Regulations-Title-1/15-40-Compiled-(4).pdf.aspx?lang=en-US (retrieved 2026-11-13)
- D.C. Code § 34-1501 Definitions: https://code.dccouncil.gov/us/dc/council/code/sections/34-1501 (retrieved 2026-11-13)
- 15 DCMR Chapter 9 compiled (not fully reviewed): https://dcpsc.org/getattachment/Orders-and-Regulations/Orders-Rules-and-Regulations/District-of-Columbia-Municipal-Regulations-Title-1/15-9-Compiled-%28Updated-4-7-25-%29-%281%29.pdf.aspx?lang=en-US (retrieved 2026-11-13)
All 1 utilities in District of Columbia
Residential customers in District of Columbia per EIA-861 (2025). Customer counts = bundled + delivery-only service (EIA-861 Part A + Part D). Service territory is reported by county; a county can be served by several utilities.
$500 / month
Unlimited interconnection applications. 12-month agreement, signed online. The agreement starts the day you sign; first invoice right away, then monthly.
- Unlimited interconnection applications
- Single-line diagram and site plan for every application
- Pre-submission check against the utility’s requirements
- Homeowner e-signature link for the authorization
- Filing in your utility portal accounts or by the utility’s method
- Utility questions, corrections and resubmissions
- Follow-up through approval, inspection and PTO
- Customer list, exports, API and webhooks
Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.