Delaware interconnection applications
11 electric utilities serve Delaware (EIA-861, 2025): 1 investor-owned utility, 1 electric cooperative, 9 municipal utilitys. Together they serve 464,565 residential customers; 15,186 residential customers were on net metering at year-end 2025.
Largest utilities in Delaware
Investor-owned utility · 493,163 residential customers · Delaware
Applications: Own online portal – Connect the Grid Interconnection Portal (Green Power Connection)
Interconnection process and documents →Electric cooperative · 108,801 residential customers · Delaware
Applications: PDF + email – DEC Interconnection Application (fillable PDF) emailed to interconnection@delaware.coop; fee check by mail to 14198 Sussex Highway, Greenwood, DE 19950
Interconnection process and documents →Municipal utility · 21,793 residential customers · Delaware
Interconnection process and documents →Municipal utility · 11,925 residential customers · Delaware
Interconnection process and documents →Municipal utility · 9,193 residential customers · Delaware
Interconnection process and documents →Municipal utility · 7,504 residential customers · Delaware
Interconnection process and documents →Municipal utility · 6,546 customers · Delaware
Interconnection process and documents →Municipal utility · 4,474 customers · Delaware
Interconnection process and documents →Municipal utility · 4,087 customers · Delaware
Interconnection process and documents →Municipal utility · 2,952 customers · Delaware
Interconnection process and documents →Municipal utility · 1,826 customers · Delaware
Interconnection process and documents →Export compensation among the researched Delaware utilities: NEM. Rules differ by utility – see each utility page.
Delaware interconnection rule
Delaware Public Service Commission (PSC)
Interconnection rule26 Del. Admin. Code 3001 §8.10 (interconnection via standard tariff based on IREC model rules) implemented by Delmarva Power 'Interconnection Standards for Delmarva Power & Light Company's Delaware Operating Territory' (PSC Regulation Docket No. 49, Orders 7832 and 7984) – Interconnection Standards for Delmarva Power & Light Company's Delaware Operating Territory · source
Applies toDelmarva Power & Light (only PSC rate-regulated distribution utility) for small generators <=10 MW (Rate X <=1 MW) not subject to PJM interconnection. Delaware Electric Cooperative and DEMEC municipal utilities set their own rules under 26 Del. C. §1014.
Application formDelaware Interconnection Application & Agreement (Delmarva form; Level 1 two-part form: Part I application, Part II certificate of completion); separate Level 2-4 application; electronic submission via Delmarva Green Power Connection.
TimelinesLevel 1: 5 BD completeness, 15 BD verification; approval conditioned on local code approval, certificate of completion, witness test (or waiver), signed agreement (signed within 30 BD). Level 2: 5 BD completeness, 20 BD evaluation.
FeesLevel 1 none; Level 2 <= $50 + $1/kW; Levels 3-4 <= $100 + $2/kW (Section 5).
Insurance3001 §8.10 and 26 Del. C. §1014(e)(5): supplier may not require eligible net-metering customers to purchase excessive liability insurance. Level 1 agreement reportedly requires no general liability insurance (not verified in text).
External disconnectRequired: lockable isolation device accessible by utility (visible-break on primary; status clearly indicated on secondary), owned by customer (Section 6G). No inverter waiver in text.
Export compensationNEM – 26 Del. C. §1014(d)-(k); 26 Del. Admin. Code 3001 §8
Residential <=25 kW (Delmarva, DEC, munis); nonresidential <=2 MW per Delmarva meter, 500 kW per DEC/municipal meter; farms <=150 kW; system <=110% of annual consumption; excess carried forward in kWh, no payout at year end.
Under §1014(d) municipal electric companies and DEC (while exempt under §223) must adopt their own net metering rules (25 kW residential, 500 kW nonresidential, encouraged up to 2 MW) and per §1014(e)(5) adopt IREC model interconnection procedures unless their regulator approves deviation. DEC publishes 'Technical Requirements for Member Owned Generation'.
| Level | Up to | Criteria / review / fee |
|---|---|---|
| Level 1 | 10 kW | Inverter-based, lab-certified, nameplate <=10 kW · Complete/incomplete 5 BD; verification 15 BD after complete · No fee |
| Level 2 | 2000 kW | <=2 MW, certified equipment, radial circuit or spot network serving one customer · Completeness 5 BD; evaluation 20 BD · max $50 + $1/kW |
| Level 3 | 10000 kW | Non-exporting: <=50 kW area network or <=10 MW radial · Area network impact study 25 BD · max $100 + $2/kW |
| Level 4 | 10000 kW | <=10 MW not qualifying for Levels 1-3; scoping meeting and studies · max $100 + $2/kW plus study costs |
- Delmarva DE Interconnection Standards (eff. 2011-08-08): https://azure-na-assets.contentstack.com/v3/assets/blt47b6e332b18fb457/blt365357b6213bd0e0/64b7ad2505b45529a8b5cf0d/Delaware_Interconnection_Standards.pdf (retrieved 2026-11-13)
- PSC Order No. 7984, Reg. Docket 49: https://depsc.delaware.gov/wp-content/uploads/sites/54/2017/03/7984.pdf (retrieved 2026-11-13)
- 26 Del. C. Ch. 10 §1014: https://delcode.delaware.gov/title26/c010/index.html (retrieved 2026-11-13)
- Delmarva DE NEM & Interconnection Application Checklist: https://www.delmarva.com/cdn/assets/v3/assets/blt47b6e332b18fb457/blt8c44e09c61b0e47a/64e6cffeb5c7fa000d42a53c/GPC_DPL_DE_ApplicationChecklist_2015_08_06.pdf (retrieved 2026-11-13)
- DE PSC Electric Regulation: https://depsc.delaware.gov/electric-regulation/ (retrieved 2026-11-13)
All 11 utilities in Delaware
- Delmarva Power305,349
- Delaware Electric Cooperative (DEC)108,801
- City of Dover21,793
- City of Newark11,925
- Town of Middletown9,193
- City of Milford7,504
- Town of Smyrna0
- City of Seaford0
- City of Lewes0
- New Castle Municipal Serv Comm0
- Town of Clayton0
Residential customers in Delaware 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.