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County of Horry (SC)

South Carolina Authority Having Jurisdiction Solar permitting requirements
NEC Code Version2020
Fire Code Version2018 Building Code
SolarAPP+ StatusNot accepted
Wet Stamps RequiredDigital Structural
Fire Setback Enforced1

Codes

NEC Code Version
2020
Fire Code Version
2018 Building Code
Code List

2021 INTERNATIONAL BUILDING CODE

2021 INTERNATIONAL RESIDENTIAL CODE

2021 INTERNATIONAL FIRE CODE

2021 INTERNATIONAL PLUMBING CODE

2021 INTERNATIONAL MECHANICAL CODE

2021 INTERNATIONAL FUEL GAS CODE

2020 NATIONAL ELECTRICAL CODE

2009 INTERNATIONAL ENERGY CONSERVATION CODE (ENERGY STANDARD ACT)

ASCE Code Specification
ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status
Not accepted
Any SolarAPP+ Restrictions
1
SolarAPP+ Restrictions
MPU,Derate
How Many Plansets Required
2
Revision Required
1
New Planset Required For Module Swap
1

Stamps

Ee Stamp Required On SLD
Yes
Wet Stamps Required
Digital Structural
Structural Calculations Required
Yes
Ee Stamp Notes

Effective November 4, 2024 all submittals in regards to Solar Panels and EV Chargers install on

residential structures/property shall include an electrical diagram approved by a licensed South

Carolina Engineer and shall bear the engineers seal/signature on the diagram sheet.

This will be in addition to the regular documentation required at submittal.

This shall include for the following submittals:

1)New Solar Panel installs

2)Back up batteries install on existing solar panel system

3)EV charging systems

4)Any permits in regards to Solar Panels and EV Chargers or similar work.

Stamp Location On Plans
Unspecified
Date On Stamps
Expiration Date

Fire setbacks

Fire Setback Enforced
1
Setback Notes

Fire setbacks are to be 4' with overhang. 18" from ridge.

  • Formula for the fire setbacks must be listed on the plan set. If you have questions reach out to Michael.

Structural & loads

Wind Speed
150
Snow Load
10
Reducible Snow Load Allowed
1
Max Attachment Spacing
96
Structural Notes

SE digital stamps on corresponding PV pages & PE Letter / Calcs.

PANEL QUANTITY NEEDS TO BE REFERENCED ON THE STRUCTURAL CALCS. (Write as a note in Note To Vendor)


Engineer letter must be with the packet and must include the roof load and the wind speed must meet 2018 IRC also must include that it was inspected and can withhold the load and winds.


Effective November 4, 2024 all submittals in regards to Solar Panels and EV Chargers install on residential structures/property shall include an electrical diagram approved by a licensed South Carolina Engineer and shall bear the engineers seal/signature on the diagram sheet.

This will be in addition to the regular documentation required at submittal.

This shall include for the following submittals:


1)New Solar Panel installs

2)Back up batteries install on existing solar panel system

3)EV charging systems

4)Any permits in regards to Solar Panels and EV Chargers or similar work.

Minimum Ground On Roof
#10

Electrical

Allowed POI
Line Side Taps,PV Breaker,Load Side Taps,Meter Adapter
Panel Schedule Required
Partial Home Backup
Temperature Rating
90
De Rating Ampacity
0.91

Battery / ESS

Unique Battery Placards Needed
0
ESS Notes

Standard

Separate ESS Disconnect Required
No
ESS Elevation Detail Required
No

Plan set

Plan Set Requirements
  • Planset will need to have a D2 Seismic notation on them.
Electrical Diagram

Size of wire and conduit must be listed. Labels must be listed.

Custom Placards Required
0
Placards Notes
Permit card must be filled out with License numbers and names for each trade on back of yellow card and signed before posted on site. All need to submit or leave in packet solar installation letter notarized saying following information: Please be advised that we have installed roof mounted solar panels at _________________ per structural evaluations and the design criteria listed on the structural calcs listed below. This is based on codes within your jurisdiction. If have any further questions or concerns, please contact the installer, staff at

Ground mount

Ground Mount Fencing Required
No
Ground Mount Notes

Add - Note: D2 Seismic Area

Compiled from public records, 2026. Requirements change with code cycles and local amendments. Verify with the County of Horry (SC) building department before you rely on this, and treat it as a research head start, not a ruling. Getting quotes? Run them through the quote checker first.