Mississippi
Solar Permit Plans.
NEC 2020. Self-Consumption First.
Entergy MS · MS Power · Gulf Coast Wind Zone.

Entergy Mississippi (an Entergy Corporation subsidiary, the same parent company as Entergy Arkansas and Entergy Louisiana) serves most of Mississippi including Jackson, Hattiesburg, Vicksburg, Greenville, Tupelo, and the Delta region. Mississippi Power (a Southern Company subsidiary, the same parent as Alabama Power and Georgia Power) serves the three Gulf Coast counties — Hancock, Harrison, and Jackson — including Biloxi, Gulfport, D'Iberville, Ocean Springs, and Pascagoula. Each utility has its own distributed generation program and interconnection application. We confirm Entergy Mississippi or Mississippi Power per address before building every Mississippi plan set — submitting the wrong utility's application results in rejection.pi including Jackson, Hattiesburg, Vicksburg, Greenville, and the Delta region. Mississippi Power (a Southern Company subsidiary) serves the southeastern corner including Biloxi, Gulfport, Pascagoula, and the Gulf Coast. Both have limited distributed generation programs that differ from traditional net metering.

Mississippi does not have mandatory net metering for investor-owned utilities as of 2026. Neither Entergy Mississippi nor Mississippi Power is required by state law to offer 1:1 retail net metering. Both utilities operate limited distributed generation (DG) programs that purchase excess solar at rates potentially below retail — similar to Alabama Power's avoided cost DG Rate and TVA's Dispersed Power Generation program. This makes Mississippi solar economics fundamentally different from states with mandatory net metering like Kentucky (KRS 278.465), Arkansas (Act 827), or Vermont. In Mississippi, every kilowatt-hour of self-consumed solar offsets a retail purchase; every kilowatt-hour exported earns a below-retail DG program credit. Battery storage is the financial mechanism that makes Mississippi solar compelling. of 2026. Mississippi Power has a limited distributed generation purchase program. Entergy Mississippi has a limited DG tariff. Both may credit excess solar at rates below the full retail rate. Confirm current program terms per utility before designing systems.

Mississippi Code § 27-33-67 provides a property assessment freeze for qualifying solar installations — the assessed value of the property cannot be increased due to the solar installation for the qualifying period. This is distinct from a full property tax exemption (like Alabama's Ala. Code § 40-9B-3) or a deduction (like Indiana's IC § 6-1.1-12-26.1). The freeze prevents the assessor from raising the assessed value of the property because solar was added. Confirm current eligibility criteria and freeze duration with the applicable Mississippi county assessor per address — program terms and local adoption vary by county. Mississippi has no state solar income tax credit and applies sales tax to solar equipment, making this property assessment freeze the primary ongoing state-level financial consideration.qualifying properties. No Mississippi state income tax credit. No Mississippi sales tax exemption for solar. No mandatory net metering. Federal 25D residential credit expired December 31, 2025. Self-consumption optimization is critical.

Mississippi's limited DG programs from Entergy Mississippi and Mississippi Power mean self-consumption at the full retail electricity rate is far more valuable than exporting to the grid at the DG program's potentially below-retail credit rate. A Mississippi customer paying 12 cents per kWh retail who self-consumes a kilowatt-hour saves 12¢. The same kilowatt-hour exported under a DG program that credits at 5¢ generates only 5¢ of benefit — a 58% reduction in financial value. Battery storage systems capture midday solar surplus that would otherwise be exported at low value and dispatch it during evening hours when it offsets retail purchases at full value. For Mississippi solar, proper system sizing for self-consumption and battery storage recommendation are the two most financially significant decisions on any residential project.re valuable than exporting at the utilities' credit rate. Systems should be sized for self-consumption first. Battery storage that captures midday surplus for evening use significantly improves Mississippi solar economics.

NEC 2020 under the Mississippi State Building Code, administered by the Mississippi State Building Commission. Mississippi adopted NEC 2020 statewide for all electrical installations including solar PV systems. Article 690 governs Mississippi solar PV system design — including rapid shutdown (§690.12), wiring methods, inverter disconnects, and system labeling. Article 706 governs energy storage systems. Article 625 governs EV charging equipment. IBC 2018 and IRC 2018 are the current Mississippi structural codes. Gulf Coast Mississippi counties (Hancock, Harrison, Jackson) have significant ASCE 7 hurricane wind zone structural requirements in addition to the standard NEC 2020 electrical requirements. Confirm any local amendments with the specific AHJ. Mississippi has not adopted NEC 2023 as of 2026.

Yes. Hancock County, Harrison County, and Jackson County — Mississippi's three Gulf Coast counties — are in the ASCE 7 hurricane wind zone due to their Gulf of Mexico exposure and historic hurricane track patterns. Communities affected include Bay St. Louis, Waveland, Pass Christian, Gulfport, D'Iberville, Biloxi, Ocean Springs, Gautier, and Pascagoula. Solar racking in these three counties must be engineered for hurricane-track wind loads that are substantially higher than inland Mississippi ASCE 7 values. Plan sets using standard inland Mississippi wind values fail structural review at Harrison County, Hancock County, and Jackson County building departments. We confirm ASCE 7 coastal wind zone status per address for every Gulf Coast Mississippi project. Inland Mississippi counties — Hinds, Forrest, Rankin, DeSoto, Lauderdale — use standard inland ASCE 7 wind values. Christian, Pascagoula) are in the Gulf Coast hurricane wind zone. Solar racking must be engineered for hurricane-track wind loads. We confirm wind zone per address for all coastal Mississippi projects.

Mississippi has no statewide PE stamp requirement for standard residential rooftop solar installations. Jackson, Hattiesburg, Gulfport, Biloxi, and most Mississippi county building departments do not require a PE stamp for standard residential rooftop solar plan sets. However, Gulf Coast counties (Hancock, Harrison, Jackson) occasionally request PE-stamped structural drawings for residential solar due to the hurricane wind zone structural complexity — confirm with the coastal AHJ before ordering. Commercial solar installations require PE-stamped structural drawings. Ground-mount systems of all sizes require PE-stamped structural engineering. Large-scale commercial and industrial projects in the Gulf Coast wind zone require particularly thorough PE review of wind load calculations. Permit Design coordinates PE stamp services for Mississippi commercial and ground-mount projects upon request.

Most Mississippi residential solar permit plan sets are delivered in 24 to 48 hours from project submission. Battery storage plan sets ship same day when ordered with the solar plan set. Coastal wind zone projects (Hancock, Harrison, Jackson counties): 24 to 48 hours — hurricane wind calcs are built into our standard process. Commercial solar plan sets: 3 to 5 business days depending on system complexity and utility territory. EV charger permit plan sets: 24 to 48 hours. All Mississippi residential plan sets include Entergy Mississippi or Mississippi Power DG program interconnection documentation, self-consumption optimization rationale, NEC 2020 Article 690 single-line diagram, ASCE 7 wind calcs (hurricane zone for coastal addresses), structural calculations, and all 7 plan set sheets. Rush delivery available — contact us before ordering to confirm turnaround for your deadline.