Santee Cooper interconnection application

Santee Cooper is a state power authority serving 188,962 residential customers in South Carolina (EIA-861, 2025). Applications: Own online portal (DocuSign interconnection process (initiated after $100 fee); Interconnection Request Application PDF (SC0924i Attachment 7)). Gridpol files Santee Cooper 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 Santee Cooper’s official sources (see below). Process confirmed from Santee Cooper 2026 program manual. Not verified: commercial interconnection fees/levels (see SCPSA Generator Interconnection Procedures), DG-25 rider text read only via manual.

Santee Cooper at a glance

Utility

South Carolina Public Service Authority

Type

State power authority

EIA utility ID

17543

Residential customers

188,962 (EIA-861, 2025)

Net-metered residential customers

1,954 (EIA-861, 2025)

Service territory

3 counties in South Carolina

How to apply

Own online portal – DocuSign interconnection process (initiated after $100 fee); Interconnection Request Application PDF (SC0924i Attachment 7) · official link

Who submits

Customer pays fee; installing contractor (SE Trade Ally / NABCEP PV installation professional) is contacted to submit supporting documentation via DocuSign. Approved IRAs emailed to customer or installer.

Export compensation

Net billing – Distributed Generation Rider DG-25
Self-consumed energy offsets retail; exported energy credited at $0.0415/kWh; $10.00/month DG customer charge (per 2026 manual). Santee Cooper is a state-owned utility not under SC PSC net metering rules.

Review time (official)

IRA package reviewed and approved/denied within 10 business days of submission (2026 Program Manual).

Documents Santee Cooper asks for

Interconnection application formInterconnection Request Application (IRA), Santee Cooper form SC0924i Attachment 7 Gridpol prepares this.
Proof of insuranceProof of home liability coverage meeting minimum requirements of Santee Cooper Interconnection Standard
Single-line diagram (one-line)Electrical diagram Gridpol prepares this.
PV module spec sheetPV module specification data sheet
Inverter spec sheetInverter specification data sheet; must pass UL 1741 anti-islanding; IEEE 929/1547/1547.1
Customer signatureDocuSign
Final inspection sign-offFinal passed local inspection report submitted to Santee Cooper, then contact Santee Cooper for final acceptance testing
Other utility-specific document (when applicable)Rebate only: Rebate Reservation Worksheet (max monthly kW demand), NABCEP installer letter, rebate application within 90 days of installation

How the Santee Cooper process runs

(Rebate) Submit Rebate Reservation Worksheet to determine max monthly kW demand.
Select SE Trade Ally / NABCEP installer; proposal and Santee Cooper savings estimate.
Pay $100 non-refundable IRA fee - starts DocuSign interconnection process.
Installer submits IRA, insurance proof, electrical diagram, module and inverter spec sheets via DocuSign.
Approval/denial within 10 business days via DocuSign (approved IRA typically needed for building permit).
Install within 90 days of approval (rebate); obtain local permit and passed final inspection.
Submit final inspection report (and NABCEP letter) and contact Santee Cooper for final acceptance testing; meter set and interconnection.

Fees

Fee	Applies to	Note
$100	Residential Interconnection Request Application	Non-refundable; check/cashier's check/money order by mail or cash in local office; payment starts DocuSign process

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

Size levels and limits

Level	Up to	Note
Residential	20 kW	Lesser of 20 kW or estimated maximum monthly kW demand; min 1 kW AC for rebate
Net metering cap	20 kW

Residence must be separately metered on Santee Cooper residential service (RG/REV) before interconnection.

Storage, EV and stamps

Battery storage

Battery backup systems allowed; rebates apply only to the solar portion (kW AC), not batteries (2026 Program Manual FAQ). No separate storage interconnection rules found.

Common issues the utility lists

Discrepancies between application and installed system found at inspection may delay or void rebate

Gridpol’s pre-submission check covers these before we file.

Sources

Santee Cooper 2026 Solar Home & Solar Share Home Program Manual (v12012025): https://www.santeecooper.com/Programs-Incentives/EmpowerSolar/Solar-Home/_pdfs/2026-Solar-Residential-Program-Manual-v1-12012025.pdf (retrieved 2026-11-13)
Santee Cooper Generator Interconnection Standards: https://www.santeecooper.com/policies-reference-materials/generator-interconnection-standard/ (retrieved 2026-11-13)
Santee Cooper Interconnection Request Application (Attachment 7): https://www.santeecooper.com/_Assets/pdfs/Forms/SC0924i_Attachment-7.pdf (retrieved 2026-11-13)

Other utilities in South Carolina

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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.