Marlboro Electric Cooperative, Inc.

South Carolina Utility Interconnection & net metering rules

Spot something wrong?

Tariffs and interconnection rules move often. If something here is out of date or missing, tell us and we'll fix it.

Report a correction
Net Metering AllowedYes
NEM TypeAnnual
Line Taps AllowedNo
Load Taps AllowedNo
AC Disconnect RequiredYes

Net metering & export

Net Metering Allowed
Yes
NEM Type
Annual
TOU Utility
No
Post Solar Billing Method
Net Metering
Net Excess Generation Notes

Energy charges (or credits) shall be based on the rates in the applicable rate schedules as described in the Availability section above. For purposes of calculating monthly energy in kilowatt-hours, member’s usage shall be reduced by the total of (a) any excess energy delivered to the Cooperative in the current month plus (b) any accumulated excess energy balance remaining from prior months. Total energy in kilowatt-hours billed to members shall never be less than zero. For any billing month during which excess energy exceeds the member’s usage in total, producing a net credit, the respective energy charges for the month shall be zero. Credits shall not offset the facilities or distribution service charge for the applicable rate schedule.

 Excess energy not used in the current billing month to reduce billed kilowatt-hour usage shall be accumulated and used to reduce usage in future months; however, any accumulated excess energy not used to reduce billed kilowatt-hour usage shall be reset to zero during the normal billing cycle each June. Excess energy delivered prior to June’s billing will only be used to reduce usage provided by the Cooperative prior to June’s billing.

 There will be no compensation paid to the retail member for excess energy granted to the Cooperative.

Rebates Offered
No

Interconnection & taps

Approval Req To Install
Yes
Line Taps Allowed
No
Load Taps Allowed
No
Automatic Transformer Upgrade Size
0

System size & offset

System Size Restrictions
20
System Size Restriction Type
AC kW
System Size Battery Included
No
System Size Includes Existing Systems
No
Offset Type
Combination
Offset Value
100
Offset Calculation Basis
Historical
Offset Calculation Period
12
Industry Standard Watts Sqft
2
Offset Calc Tool
Historical Usage

Metering & disconnect

Production Meter Required
No
AC Disconnect Required
Yes
AC Disconnect Labeling
Visible Lockable Labeled Disconnect
Allowed Meter Adapter
None

Plans & docs

Site Plan Reqs
  • A manual load-break disconnect switch or safety switch with a clear visible indication of switch position between the Area EPS and the Distributed Resource. The switch must be visible to, and accessible to Company personnel. The switch must be in close proximity, and visible from, the Customer’s point of electrical interconnection with the Company’s Area EPS.
SLD Reqs
  • Required to be stamped by a licensed engineer
Electrical Stamp Required
Yes
Meter Num Req SLD 3LD
No
ESID Num Req SLD 3LD
No
Website
link
Phone
(843) 665-4070

Other details

Revision Required
No
Mod Swap Requires Planset
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with Marlboro Electric Cooperative, Inc. before you rely on this. The useful move: if an installer says you need a main panel upgrade, ask how these tap and interconnection policies were considered first.