Entergy Mississippi interconnection application

Documents Entergy Mississippi asks for

• Interconnection application formStandard Interconnection Agreement for DER (residential ≤20 kWdc = Level 1 form; Level 2/3 forms for larger non-residential) Gridpol prepares this.
• Single-line diagram (one-line)One-line diagram showing accessible 'visible open' disconnect within 3 ft of meter, or plaque specifying location Gridpol prepares this.
• Inverter spec sheetManufacturer literature for the specific system(s); inverter must be UL 1741 SA and IEEE 1547-2018 certified (a 'No' means denial)
• UL 1741 / IEEE 1547 certificationUL 1741 SA certification incl. anti-islanding
• Customer signatureCustomer signs agreement; installer signs certification
• Battery spec sheet (when applicable)Battery backup: description attached
• Other utility-specific document (when applicable)Proof of site control for new customers; rental-property / low-to-moderate income addendum or affidavit if claiming LMI adder; description of any existing generator

How the Entergy Mississippi process runs

1. Submit Standard Interconnection Agreement with one-line diagram and manufacturer literature via Entergy Interconnection Portal (or mail) at least 30 business days (residential) before intended interconnection.
2. Entergy reviews plans (residential best efforts 14 days) and lists any required modifications.
3. Install per NEC/IEEE 1547 with lockable, accessible manual disconnect; customer provides meter socket.
4. Entergy inspects and gives approval to operate; installs bi-directional meter. No parallel operation before approval and meter installation.
5. Account added to Net Energy Metering rate schedule; one-time $95/$135 fee billed.

Fees

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

Size levels and limits

Level 1 may not offset >110% of prior-year annual kWh; Levels 2/3 ≤110% of prior-year peak kW. Panels must be on the facility, behind the meter (no remote/ground-mounted per page). Entergy may refuse applications above 3% of system peak. Single-phase interconnections limited to below 150 kVA.

Storage, EV and stamps

Common issues the utility lists

• Inverter not UL 1741 SA or IEEE 1547-2018 certified (form: 'No' results in denial)
• Service from Entergy Downtown Jackson network (all DER interconnections prohibited)
• System sized above 110% of annual usage

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

Sources

• Entergy Mississippi - Net metering for renewable energy resources: https://www.entergymississippi.com/net-metering/ (retrieved 2026-11-13)
• Entergy Mississippi Standard Interconnection Agreement for DER (Residential ≤20 kWdc): https://www.entergymississippi.com/wp-content/uploads/Interconnection_App_and_Agreement_Level_1.pdf (retrieved 2026-11-13)
• Entergy Interconnection Portal Manual for External Users Rev 2.0: https://www.entergymississippi.com/wp-content/uploads/Entergy-Interconnection-Portal-Manual-for-External-Users-Rev2.0.pdf (retrieved 2026-11-13)