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Investor-owned utilityMississippi Power interconnection application
Mississippi Power is an investor-owned utility serving 158,206 residential customers in Mississippi (EIA-861, 2025). Applications: PowerClerk (Mississippi Power Interconnections PowerClerk (Levels 1-2)). Gridpol files Mississippi Power 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 Mississippi Power’s official sources (see below). Required SLD/site plan for Level 1 not itemized in application text; confirm in PowerClerk.
Mississippi Power at a glance
Mississippi Power Co (Southern Company)
TypeInvestor-owned utility
EIA utility ID12686
Residential customers158,206 (EIA-861, 2025)
Net-metered residential customers530 (EIA-861, 2025)
Service territory23 counties in Mississippi
How to applyPowerClerk – Mississippi Power Interconnections PowerClerk (Levels 1-2) · official link
Who submitsCustomer or a customer-authorized installer; installer usually submits Level 1/2 in PowerClerk as a courtesy. Level 3: PDF emailed to MPCInterconnections@southernco.com.
Export compensationNet billing – Renewable Energy Net Metering RENM-2 (MS Distributed Generation Rule)
Monthly netting; excess purchased by MPC; transferring RECs to MPC makes customer eligible for Distributed Generation Value component.
Level 1: submit ≥30 business days before desired interconnection; completeness status within 10 business days; review/screens within 15 business days after complete; meter replaced within 10 business days after final approval; interconnection must complete within 90 calendar days of conditional approval. Level 2: submit ≥60 business days ahead.
Documents Mississippi Power asks for
- Interconnection application formDistributed Generator Interconnection Application and Agreement (Level 1 ≤20 kW / Level 2 / Level 3) Gridpol prepares this.
- PV module spec sheet (when applicable)Manufacturer specification sheets 'if available'
- Inverter spec sheet (when applicable)Manufacturer spec sheets if available
- Customer signatureCustomer signs agreement incl. REC transfer election and incentive elections
- Final inspection sign-off (when applicable)Approval by local code office(s), if applicable
- Other utility-specific document (when applicable)LMI qualification and W-9 if electing LMI incentive / incentive payment
How the Mississippi Power process runs
- Select installer.
- Submit application in PowerClerk (L1/L2) or emailed PDF (L3).
- MPC completeness notice (10 business days), queue position, screening review -> conditional approval or denial.
- Install per local codes; keep system off.
- Local code approval; schedule witness test (48-hour notice).
- Witness test passed; MPC executes Certificate of Completion (emailed) = permission to operate; meter replaced if needed.
Fees
| Fee | Applies to | Note |
|---|---|---|
| $0 | Level 1 ≤20 kW | No processing fee |
| $50 | Level 2 >20 kW-2 MW | Processing fee (per Level 2 application) |
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 |
|---|---|---|
| Level 1 | 20 kW | Inverter-based |
| Level 2 | 2000 kW | |
| Level 3 | >2 MW or not qualifying for L1/L2 | |
| Net metering cap | 20 kW |
RENM: residential lesser of 110% of prior-year annual peak demand or 20 kW DC; non-residential lesser of 110% or 2 MW DC; RENM-2 capped at 3% of 2022 system peak. Residential >20-100 kW may use CSPP.
Storage, EV and stamps
Battery storage
Battery listed as generator type in DG process. RENM-I offered one-time $2,000 Residential Demand Response Battery Incentive (RENM-I schedule now marked 'under suspension').
Common issues the utility lists
- Incomplete application - additional/clarifying information requested.
- Level 1 denied after screening -> may resubmit as Level 2 within 15 business days keeping queue position.
Gridpol’s pre-submission check covers these before we file.
Sources
- Mississippi Power - Connecting to the Grid: https://www.mississippipower.com/residential/products-and-services/connecting-to-the-grid.html (retrieved 2026-11-13)
- Mississippi Power - Renewable Energy Programs & Net Metering: https://www.mississippipower.com/residential/products-and-services/renewable-energy-programs.html (retrieved 2026-11-13)
- MPC Level 1 Application and Agreement: https://www.mississippipower.com/content/dam/mississippi-power/pdfs/residential/solar/Level%201%20Application%20and%20Agreement.pdf (retrieved 2026-11-13)
- MPC Level 2 Application: https://www.mississippipower.com/content/dam/mississippi-power/pdfs/residential/solar/2023/Exhibit%20G-Level-2-Application.pdf (retrieved 2026-11-13)
Other utilities in Mississippi
- Entergy Mississippi384,493
- Coast Electric Power Association84,194
- Singing River Electric Cooperative73,398
- Southern Pine Electric Cooperative65,580
- Pearl River Valley El Power Association52,557
- 4-County Electric Power Association41,491
- Dixie Electric Power Association37,963
- Tombigbee Electric Power Association37,347
- Magnolia Electric Power Association31,161
- Central Electric Power Association31,032
$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
Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.