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Investor-owned utility

Pepco interconnection application

Pepco is an investor-owned utility serving 883,572 residential customers in District of Columbia, Maryland (EIA-861, 2025). Applications: Own online portal (Connect the Grid Interconnection Portal (Green Power Connection)). Gridpol files Pepco interconnection applications for licensed installers – solar, storage and EV chargers – with single-line diagram and site plan, unlimited for $500 a month.

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Process verified from Pepco’s official sources (see below). DC timelines (DCMR Title 15 Ch. 40) not checked; EV charger process not documented on GPC pages.

Pepco at a glance

Utility

Potomac Electric Power Co (Exelon (Pepco Holdings))

Type

Investor-owned utility

EIA utility ID

15270

Residential customers

883,572 (EIA-861, 2025)

Net-metered residential customers

61,215 (EIA-861, 2025)

Service territory

1 county in District of Columbia, 2 counties in Maryland

How to apply

Own online portal – Connect the Grid Interconnection Portal (Green Power Connection) · official link

Who submits

Contractor registers in portal and submits on behalf of customer; customer can also apply; customer and contractor both track status.

Export compensation

NEM – MD net energy metering; D.C. Customer Net Energy Metering Contract
DC requires the NEM contract for Levels 1-4

Review time (official)

COMAR 20.50.09.09 Level 1: complete/incomplete notice within 5 business days; safety verification within 15 business days after completeness; approval and permission-to-operate notice within 20 business days of receiving acceptable documents. Invoice emailed within four business days after submission (Pepco MD page); fees paid before technical review.

Documents Pepco asks for

  • Interconnection application formUtility Level 1 (or Level 2-4) Interconnection Application/Agreement uploaded in Connect the Grid Gridpol prepares this.
  • Recent electric billcustomer's recent bill
  • PV module spec sheetmanufacturer spec sheets of proposed system
  • Inverter spec sheetmanufacturer spec sheets
  • Single-line diagram (one-line)electronic single-line drawing Gridpol prepares this.
  • Site plan / site layoutelectronic site plan Gridpol prepares this.
  • Customer signaturesignatures on application/agreement
  • Battery spec sheet (when applicable)Energy Storage Supplemental Form when storage is included
  • Final inspection sign-offApplication Part 2 / Certificate of Completion after install with local electrical inspection
  • Net metering / net billing agreement (when applicable)DC: D.C. Customer Net Energy Metering Contract; MD ANEM rider for aggregated NEM
  • Other utility-specific document (when applicable)MD Site Control form, Pre-Application form (optional), Change Notice for new homeowners

How the Pepco process runs

  1. Contractor registers and logs in to the Connect the Grid portal
  2. Contractor completes online application, uploads utility interconnection form/agreement, technical documents and signatures, submits
  3. System calculates fee and emails invoice; fees must be paid before technical review
  4. Application proceeds through approval steps; customer and contractor track status in dashboard
  5. Contractor installs the system (after approval)
  6. Contractor completes Application Part 2 in the portal (completion/inspection)
  7. After final review the utility emails Permission to Operate to customer and contractor

Fees

FeeApplies toNote
$0MD/DC Level 1 (<=20 kW inverter-based)
$50 + $1/kW ACMD Level 2 (<=2 MW)
$100 + $2/kW ACMD Level 3/4
$237.86 per application ($231 + $6.86 admin)MD MCAM-S residential (secondary <=600 V), from 2026-05-01commercial secondary: $151/kW + $0.15/kW admin
$500DC Level 2 (<=5 MW) and Level 3
$1,000DC Level 4applied toward studies

Utility fees are paid by the installer or customer; they are not part of the Gridpol plan.

Size levels and limits

LevelUp toNote
Level 120 kWinverter-based (MD and DC)
Level 22000 kWMD; DC Level 2 up to 5 MW
Level 310000 kWMD radial/area networks <=50 kW; DC <=20 MW
Level 410000 kWMD <10 MW; DC <20 MW

Storage, EV and stamps

Battery storage

Energy Storage Supplemental Form required with application when storage is included. Maryland Energy Storage Supplemental Form submitted with the interconnection application: stand-alone vs. paired, shared inverter, whether it can charge from the grid (and how prevented), kW AC/kWh, operating intent (offset load/non-export, net meter, wholesale, backup), lockable visible AC disconnect, one-line diagram.

Sources

Other utilities in Maryland

All Maryland utilities →

Gridpol Unlimited

$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
Get started

Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.

Get started – $500/month unlimited