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Investor-owned utility

Lockhart Power Company interconnection application

Lockhart Power Company is an investor-owned utility serving 4,961 residential customers in South Carolina (EIA-861, 2025). Gridpol files Lockhart Power Company 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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Partly researched from official sources. Only the RS-1 rider is published; no application form, fee amount or DG submission channel on lockhartpower.com (no email listed). SC GIP (eff. 6/18/2021) by its text applies to state-jurisdictional interconnections to Utility Systems in SC, but Lockhart has not published its own copy; Lockhart's interconnection docket 2019-194-E was administratively closed 11/25/2019 (Order 2019-805). Verify on first project: application form and fee, submission (mail/in person/email), whether SC GIP timelines apply, battery rules, commercial options.

Lockhart Power Company at a glance

Utility

Lockhart Power Co

Type

Investor-owned utility

EIA utility ID

11118

Residential customers

4,961 (EIA-861, 2025)

Net-metered residential customers

none reported

Service territory

5 counties in South Carolina

Who submits

Customer must submit the completed Interconnection Request Application and fee and receive written approval (Rider RS-1). If leased, lessor must hold a valid SC ORS leasing certificate.

Export compensation

Net billing – Residential Solar Net Metering Experimental Rider RS-1
Customer charge $18.00; energy charge greater of $39.70 or Rate R/RA kWh rates on net usage; Excess Energy credited at $0.021/kWh; single bi-directional billing meter; 1-year term then 30 days notice.

Review time (official)

Not stated by Lockhart; SC GIP model timelines (if applied): SC GIP: completeness notice within 10 business days; <=20 kW Inverter Process screening 15 business days; witness test within 10 business days of Certificate of Completion (else waived); written authorization to energize and meter replacement within 10 business days after witness test/waiver.

Documents Lockhart Power Company asks for

  • Interconnection application formCompleted Interconnection Request Application per applicable interconnection standards; amended application required for any nameplate increase Gridpol prepares this.
  • Proof of insuranceSC GIP 6.12: residential <=250 kW homeowner's policy >= $100,000 liability per occurrence; non-residential <=250 kW CGL >= $300,000; >250 kW >= $1,000,000
  • Single-line diagram (one-line) (when applicable)SC GIP 1.3.1 requires one-line diagram, site plan and inverter spec sheets with the request (model procedure; Lockhart-specific checklist not published) Gridpol prepares this.
  • Other utility-specific document (when applicable)Leased systems: lessor's valid certificate from SC Office of Regulatory Staff; written notice within 30 days of any nameplate reduction

How the Lockhart Power Company process runs

  1. Submit completed Interconnection Request Application and fee to Lockhart Power.
  2. Receive written approval from Lockhart (required before any connection).
  3. Install per NEC/NESC/UL/IEEE and SC Interconnection Standard; local inspection.
  4. Lockhart installs bi-directional billing meter; written approval to connect.

Fees

FeeApplies toNote
$100 (SC GIP model form)Certified inverter <=20 kWRider RS-1 requires 'associated Application Fee' - amount not stated in rider; SC GIP model Attachment 7 fee is $100

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

Size levels and limits

LevelUp toNote
Residential Solar Net Metering Experimental Rider RS-115 kWNameplate <=15 kW AC
Net metering cap15 kW

Available only to residential customers on Rate Schedule R or RA; single premises; customer's own use.

Sources

South Carolina interconnection rule

Details from 2016 SCGIP; revised SCGIP from Docket 2019-326-E (Dominion redline 2022) may have changed fees/insurance/timelines - verify current version on utility site. ORS site geo-blocks server, archive copy used.

Commission

Public Service Commission of South Carolina

Interconnection rule

South Carolina Generator Interconnection Procedures, Forms and Agreements (SCGIP), adopted by Order No. 2016-191, Docket No. 2015-362-E, under S.C. Code Ann. 58-27-460; revised in Docket No. 2019-326-E – South Carolina Generator Interconnection Procedures (SCGIP) · source

Applies to

Commission-jurisdictional electrical utilities: Duke Energy Carolinas, Duke Energy Progress and Dominion Energy South Carolina (formerly SCE&G). Santee Cooper (state authority) and electric cooperatives are not bound; Santee Cooper publishes its own Generator Interconnection Procedures.

Application form

Statewide standard Interconnection Request Application Form (Attachment 3; Attachment 7 combined request/Certificate of Completion/terms for certified inverters <=20 kW) and standard Interconnection Agreement (Attachment 10)

Timelines

Receipt confirmation within 3 business days; completeness determination within 10 business days (customer has 10 business days to cure); 20 kW process: screens and approval within 15 business days; utility gets >=10 business days notice of commissioning tests; pre-application report 20 business days ($500).

Fees

20 kW Inverter Process: $100 processing fee. Study Process: deposit $10,000 + $1/kW AC. Pre-application report $500.

Insurance

Residential <=250 kW: homeowner's policy with liability >=$100,000 per occurrence; non-residential <=250 kW: CGL >=$300,000; non-residential >250 kW: CGL >=$1,000,000; self-insurance possible for creditworthy customers.

External disconnect

Required: manual load-break disconnect or safety switch with visible position indication, padlockable open, accessible to utility personnel, installed immediately adjacent to the utility meter unless otherwise approved (SCGIP 1.6 and 20 kW terms).

Export compensation

Net billing – S.C. Code Ann. 58-40-10 and 58-40-20 (Act 62 of 2019, Solar Choice Metering)
Residential customer-generators <=20 kW AC; non-residential <= lesser of 1,000 kW AC or 100% of contract demand (up to 5,000 kW AC on TOU after 2025-06-01). Solar choice tariffs for applications after 2021-05-31 at Commission-determined value; pre-June 2021 customers keep Order 2015-194 net metering until 2029-05-31. Applies to electrical utilities with >=100,000 customer accounts.

Not bound by the rule

Electric cooperatives and municipal utilities are not covered by the SCGIP or Solar Choice statute; distribution co-ops adopt their own net metering policies (2014 Act 236 s.7, uncodified); Santee Cooper has its own Generator Interconnection Procedures.

Other utilities in South Carolina

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

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