Mississippi solar in 2026 splits into two customer classes that get dramatically different economics — and the mechanism (instantaneous netting, mechanically similar to Indiana EDG) trips up most MS-focused coverage. Verify which customer class you're in before sizing a system.
The headline:
- Mechanism: INSTANTANEOUS netting — every exported kWh credits at avoided cost + 2.5¢ adder, every imported kWh costs full retail. NOT 1:1 retail (despite what many MS installer pages claim). Mechanically like Indiana EDG, NOT like Florida or Virginia net metering.
- Regular customers: export about $0.055/kWh, NO rebate. Payback about 12-14 years.
- Income-qualified (LMI, ≤225% federal poverty, first 1,000 enrollees per IOU): export about $0.075/kWh PLUS a $3,000 upfront solar rebate (or $2,000 battery rebate — mutually exclusive). Materially better economics.
- Self-consumption offsets full retail (about $0.112/kWh — among the LOWEST US residential rates).
- Federal §25D = $0 for 2026 purchases (OBBBA repeal). SmartEnergyUSA, ecowatch, ConsumerAffairs still cite 30% — outdated.
- NO state income tax credit, NO SREC market, NO RPS.
- Sales tax (7%) and property tax — NOT CONFIRMED EXEMPT for residential solar (sources claim exemptions, but no MS statute or DOR publication substantiates them for residential rooftop).
- CRITICAL co-op warning: MS rural co-ops are NOT bound by PSC Docket 2011-AD-2. Verify your specific co-op's policy in writing — many pay avoided cost only, some pay nothing for excess.
Cheap install pricing (~$2.56/W per EnergySage April 2026, among the lowest US) partially offsets the low retail and the instantaneous-netting export haircut. MS is a structurally weak-to-middle Southern state — better than Louisiana / North Dakota on payback, worse than Georgia / Alabama.
What changed federally — and what's still on Mississippi quotes that shouldn't be
The federal Residential Clean Energy Credit (§25D) — the 30% homeowner credit — was repealed for systems installed after December 31, 2025. For 2026 Mississippi buyers, the federal credit on a purchased system is $0. The same applies to home batteries purchased outright. The §48E commercial credit (30%) still exists, but only for leased or third-party-owned systems where construction begins before July 4, 2026 — and the lessor claims it, not you. Full federal context here.
The repeal came through the One Big Beautiful Bill Act (P.L. 119-21), signed in July 2025. SmartEnergyUSA, ecowatch, and ConsumerAffairs all still cite the 30% federal credit as live on their Mississippi solar pages — outdated. greenenergycalc and solartech confirm the repeal. If a 2026 Mississippi quote includes "30% federal solar tax credit" on a purchase, ask the contractor to redo the math with $0 federal and verify with IRS.
VERIFIED 2026-06 · IRS §25D repeal under OBBBA P.L. 119-21Net renewable generation — instantaneous netting, NOT 1:1 retail
Mississippi runs "net renewable generation" (NEM-2 / RENM-2) under MS PSC Docket 2011-AD-2 (2015, renamed in 2022). The mechanism is INSTANTANEOUS — mechanically similar to Indiana EDG, very different from 1:1 retail net metering states like Florida or Virginia.
How it works:
- Self-consumption (instantaneous): full retail offset (about $0.112/kWh on MS residential). When your panels make a kWh you use directly, you don't draw from the grid — full retail of value avoided.
- Export (excess, instantaneous): credited at avoided cost + 2.5¢/kWh "Non-Quantifiable Expected Benefits Adder". PSC January 2025 updated DG values for Entergy NEM-2:
- Regular residential: about $0.055/kWh.
- Income-qualified LMI: about $0.075/kWh (includes built-in +2¢/kWh adder for 15 years).
- Credits roll over INDEFINITELY (monthly converted to monetary balance) BUT CANNOT offset fixed charges or minimum bill.
- Cap: lesser of 110% annual peak demand OR 20 kW residential.
- Participation cap: 3% of each utility's maximum demand (was 4%, returned to 3%).
- Grandfathering: pre-2015 NEM participants get 25 years into the new program.
The economic consequence: instantaneous netting means daytime solar exports do NOT zero out evening grid imports at 1:1. They're netted second-by-second. Every export earns $0.055, every import costs $0.112 — a roughly 2x swing. Self-consumption is the make-or-break lever in MS, exactly like in Indiana.
Two customer classes — verify yours
REGULAR customers (the vast majority): export at about $0.055/kWh (avoided cost + 2.5¢ adder), NO upfront rebate, NO higher DG value. Modeled default in the calculator.
INCOME-QUALIFIED LMI customers (income-tested at ≤225% federal poverty, first 1,000 enrollees per utility):
- Export at about $0.075/kWh (built-in +2¢/kWh adder for 15 years).
- $3,000 upfront solar rebate (reduced from $3,500), payable to the installer.
- ALTERNATIVELY, $2,000 battery rebate — but MUTUALLY EXCLUSIVE with the solar rebate. Pick ONE at install.
- Program caps: Entergy MS $10M/year, Mississippi Power $5M/year, with at least 50% earmarked for low-income.
The LMI program is IOU-only (Entergy MS and Mississippi Power). It does NOT apply at MS co-ops. If you're income-qualified and on a co-op, the rebate doesn't help you.
Use the income-qualified toggle on the calculator above to model your case. The default is regular customer; flip the toggle if you qualify.
VERIFIED 2026-06 · MS PSC Docket 2011-AD-2 (2015, renamed 2022); MS PSC Jan 2025 DG values order; LMI program (2022)Co-ops — NOT bound by PSC Docket 2011-AD-2
This is the single biggest variable in MS solar economics outside Entergy / Mississippi Power IOU territory.
MS rural electric cooperatives (Pearl River Valley, Southern Pine, Tombigbee, Northcentral, Coast EPA, others — serving much of rural and northern MS) are NOT bound by PSC Docket 2011-AD-2. They can set their own net metering / net billing policies, or offer NONE at all.
What that means in practice:
- Most MS co-ops pay AVOIDED COST ONLY for export — no 2.5¢ NQEB adder, no LMI premium. The exact avoided-cost figure varies by co-op and is not publicly standardized — verify the specific rate in writing.
- SOME CO-OPS PAY NOTHING for excess generation. Your exports are donated to the grid with no compensation.
- The $3,000 LMI rebate (PSC program) generally does NOT apply at co-ops — it's IOU-only.
VERIFY YOUR CO-OP'S NET METERING / NET BILLING POLICY IN WRITING before signing. Ask for the specific tariff document. This is the biggest single variable in MS solar for buyers outside Entergy / Mississippi Power territory.
Mississippi Power RENM-3 — proposed but unconfirmed
Mississippi Power filed RENM-3 in December 2024 — a proposed successor to RENM-2 that would remove the prohibition on offsetting fixed charges (current RENM-2 doesn't let credits offset fixed/minimum bill charges).
Status is unconfirmed as of mid-2026. If adopted, RENM-3 modestly improves Mississippi Power solar economics by letting credits chip away at fixed charges. Verify the current status with Mississippi Power before signing if you're in their territory.
Solar for All — terminated, don't budget for it
Mississippi was awarded a Solar for All grant by the EPA, BUT the program was terminated nationwide in 2025. The MS-specific funding is likely unavailable. Don't budget for Solar for All in your 2026 quote — the grant is no longer being distributed.
Sales tax — NOT confirmed exempt for residential
This is a meaningful flag. MS state sales tax is 7%.
greenenergycalc and SmartEnergyUSA both claim a residential solar sales exemption (greenenergycalc cites about $1,280 savings). But no MS statute, no MS Department of Revenue publication confirms a residential rooftop solar sales exemption. The Mississippi Development Authority (MDA) does operate sales exemptions for:
- Industrial solar.
- Business solar.
- Corporate headquarters.
Those are different programs and do NOT cover residential rooftop.
Conservative treatment in this calculator: assume 7% applies — about $1,500-1,600 of added cost on a typical residential install. If your installer claims an exemption, ask for the specific statute citation before accepting their quote. We could not locate one for residential.
Verify directly with the MS Department of Revenue before signing. Same flag pattern as PA / ME / OH / LA / ND / ID (all confirmed not-exempt for residential).
Property tax — NOT confirmed exempt for residential
Same pattern: sources are vague, no primary statute identified.
greenenergycalc calls the treatment "favorable" but does not cite a statute. SmartEnergyUSA is vague. No primary source — no MS Department of Revenue publication, no MS statute — substantiates a residential rooftop solar property tax exemption. MDA does run a 10-year property exemption for INDUSTRIAL solar — that's a different program and does NOT cover residential rooftop.
Conservative treatment: we do NOT assume an exemption here. Verify with your county tax assessor before counting on the benefit.
MS residential property tax rates are low (about 0.65% effective), so the practical financial impact either way is modest — unlike high-property-tax states (NJ ~2.3%, CT ~2.04%, TX ~1.8%) where an exemption matters more.
VERIFIED 2026-06 · MS Dept of Revenue; MS Development Authority (industrial-only exemptions); MS AG Consumer GuideNo state income tax credit, no SREC market
State income tax credit: NONE. greenenergycalc confirms "no state income tax credit for solar in 2026." SmartEnergyUSA references vague "state tax credits" — there is no specific Mississippi solar income tax credit. Any quote citing one is unsupported.
SREC market: NONE. MS has no Renewable Portfolio Standard (RPS), no SREC market. There is no SREC revenue stream available to MS residential solar owners. Don't budget for SREC income — there isn't any.
This puts MS in the same SREC-less bucket as Indiana and North Dakota — and away from PA (about $45/SREC), MD (about $60), DE (about $30 tier-1), or NJ ($200-280 legacy).
Battery — resilience purchase (regular customers), LMI option
Regular MS customers: NO statewide battery rebate. Federal storage credit $0 (§25D repealed for storage purchase).
Income-qualified LMI customers: $2,000 battery rebate — BUT it is MUTUALLY EXCLUSIVE with the $3,000 LMI solar rebate. Pick ONE at install. If you take the battery rebate, you forfeit the solar rebate, and vice versa.
Arbitrage gap under instantaneous netting:
- About $0.06/kWh (retail $0.112 vs export $0.055) — real, but absolute dollar value is small because MS retail is low.
- "Store don't export" is a real lever (mechanically similar to Indiana), but $12,000 capex doesn't pay back on arbitrage alone.
Resilience case is real for Mississippi: Gulf Coast hurricanes, tornado alley (especially Mississippi River corridor), summer storm outages. If you want backup for storm season, a battery makes sense — for the resilience, not the ROI. The dollar math says no.
The honest payback — weak-to-middle Southern
At default install pricing of $2.85/W (range $2.18-2.95; EnergySage April 2026 reports $2.56/W — among the LOWEST US install pricing), typical Mississippi solar-only payback on regular (non-LMI) customers runs in the 12-14 year range (greenenergycalc cites 13.1).
LMI customers see materially better economics with the $3,000 rebate + $0.075/kWh export — shorter payback, materially higher 25-year value.
Where Mississippi fits in our verified set:
- Massachusetts (about $0.30/kWh retail + SMART): high single digits.
- New Jersey (about $0.26/kWh + SuSI): about 6.5 years.
- Connecticut (about $0.29/kWh + Netting minus SEA): about 8-10 years.
- Rhode Island (about $0.29/kWh + 80% NM + REF or REG): about 8-10 years.
- Delaware (about $0.165/kWh + 1:1 NM + rebate / SREC + no sales tax): about 9-11 years.
- New Hampshire (about $0.25/kWh + 85% NEM 2.0 locked-2041 + no sales tax): about 9.5 years.
- Georgia (regional reference): about 10.4 years.
- Alabama (regional reference): about 11.8 years.
- Tennessee (regional reference): about 12.2 years.
- Indiana (about $0.16/kWh + EDG instantaneous): about 9-13.7 years.
- Ohio (about $0.16/kWh + energy-only SSO export): about 12-14 years.
- Mississippi (regular, about $0.112/kWh + instantaneous + 2.5¢ adder): about 12-14 years.
- Vermont (about $0.2146/kWh + blended-rate export): about 13 years.
- Idaho — Idaho Power (about $0.10-0.11 + net billing ECR $0.05): about 15-20 years.
- Louisiana (about $0.12/kWh + avoided-cost export): about 21-23 years.
- North Dakota (about $0.12/kWh + avoided-cost export + about 28% higher install): about 20-25 years.
MS is structurally weaker than Georgia and Alabama (similar retail / mechanism but neighbors have small structural advantages), comparable to Indiana / Ohio, and meaningfully stronger than Louisiana / North Dakota. The cheap install pricing is MS's structural plus; the low retail + instantaneous-netting export haircut + no confirmed tax exemptions + federal $0 are the drags.
VERIFIED 2026-06 · eia.govHow to read this — Mississippi's case for solar
MS solar in 2026 is utility-driven and customer-class-driven.
- Verify which customer class you're in. Regular vs LMI gets fundamentally different economics. Use the income-qualified toggle on the calculator to compare.
- VERIFY YOUR UTILITY if you're not on Entergy MS or Mississippi Power. Co-ops are NOT bound by PSC Docket 2011-AD-2 — many pay avoided cost only, some pay nothing for excess.
- Right-size to your load. Instantaneous netting punishes export. Match annual production to consumption.
- Load-shift toward daylight. Every kWh shifted from grid (about $0.112) to self-consumed avoids retail; exported kWh earns only about $0.055 — a roughly 2x swing.
- Reject any quote citing the federal 30% credit on a 2026 purchase. Dead.
- If income-qualified (LMI ≤225% federal poverty), claim the $3,000 rebate — but verify enrollment slot availability (first 1,000 per utility, program-capped).
- Don't accept sales tax exemption as automatic. Sources claim it, but no MS statute confirms for residential. Likely 7% applies — about $1,500-1,600 added cost. Ask for the statute citation if your installer claims otherwise.
- Don't bank on property tax exemption. No primary source confirms for residential. Verify with your county assessor. MS property rates are low (~0.65%), so the practical effect is modest in either direction.
- Don't budget for SREC revenue. MS has no SREC market.
- Battery for resilience. Gulf hurricanes + tornado risk are real; the ROI math says no.
- If on Mississippi Power, watch RENM-3 status — it would modestly improve economics by removing the fixed-charge offset restriction.
- Solar for All is dead. The EPA terminated the program nationwide in 2025 — don't budget for it.
If you're on an IOU (Entergy MS or Mississippi Power), self-consume most of what you generate, and you can take advantage of either the cheap install pricing OR the LMI program, Mississippi solar makes a respectable weak-to-middle Southern case in 2026. If you were counting on the federal credit, on a state credit, on 1:1 retail net metering, on guaranteed tax exemptions, or on an SREC market — none of those apply.
Run your real Mississippi payback (regular vs income-qualified) →The honest picture
| Fact | Mississippi (Entergy MS default, regular customer) | Source |
|---|---|---|
| Federal credit | $0 (purchase) | IRS — §25D repealed under OBBBA P.L. 119-21 |
| State income tax credit | NONE | greenenergycalc |
| Net metering / billing | "Net renewable generation" — INSTANTANEOUS netting | MS PSC Docket 2011-AD-2 (2015, renamed 2022) |
| Export rate — regular | About $0.055/kWh (avoided cost + 2.5¢ NQEB adder) | MS PSC Jan 2025 DG values order |
| Export rate — LMI (income-qualified) | About $0.075/kWh (built-in +2¢/kWh adder for 15 yr) | MS PSC Jan 2025 DG values; LMI program (2022) |
| Export rate — co-ops | Avoided cost only (varies by co-op; no NQEB adder, no LMI premium); some pay nothing | Individual co-op tariffs (verify) |
| Self-consumed | Full retail offset (about $0.112/kWh) | (mechanical) |
| Credit handling | Rolls indefinitely (monetary) — CANNOT offset fixed charges / minimum bill | MS PSC Docket 2011-AD-2 |
| Residential cap | Lesser of 110% annual peak demand OR 20 kW | MS PSC Docket 2011-AD-2 |
| Participation cap | 3% of utility max demand (was 4%, returned to 3%) | MS PSC |
| Grandfathering | Pre-2015 participants — 25 years into new program | MS PSC Docket 2011-AD-2 |
| LMI $3,000 solar rebate | Income-qualified only (≤225% federal poverty, first 1,000 per utility) — IOU only, NOT co-ops | MS PSC LMI program (2022) |
| LMI $2,000 battery rebate | Income-qualified only — MUTUALLY EXCLUSIVE with $3,000 solar rebate | MS PSC LMI program (2022) |
| LMI program caps | Entergy $10M/yr, Mississippi Power $5M/yr, ≥50% earmarked low-income | MS PSC LMI program (2022) |
| Retail rate | About $0.112/kWh (greenenergycalc 11.2¢; among LOWEST US; rises about 1.47%/yr) | eia.gov; greenenergycalc |
| Sales tax | NOT CONFIRMED EXEMPT — 7% likely applies (about $1,500-1,600 added cost). MDA exemption is industrial / business only | MS Dept of Revenue; MS Development Authority |
| Property tax | NOT CONFIRMED EXEMPT for residential; MDA 10-year exemption is INDUSTRIAL only. MS property rates low (~0.65% effective) | MS Dept of Revenue; MS Development Authority |
| SREC market | NONE — MS has no RPS | (no market) |
| Co-ops | NOT bound by PSC Docket 2011-AD-2; most pay avoided cost only, some pay nothing | Individual co-op tariffs |
| Mississippi Power RENM-3 | Filed Dec 2024 — status unconfirmed (would remove fixed-charge offset restriction) | Mississippi Power filing |
| Solar for All | Terminated nationwide by EPA in 2025 — don't budget for it | EPA |
| Battery state rebate | $0 (regular) — $2,000 LMI (mutually exclusive with $3,000 solar rebate) | MS PSC LMI program (2022) |
| Battery federal credit | $0 (§25D repealed for storage) | IRS — §25D repealed |
| Battery arbitrage gap | About $0.06/kWh (retail $0.112 vs export $0.055) — small absolute dollars due to low retail | (mechanical) |
| $/W | About $2.56 (range $2.18-2.95) — among LOWEST US install pricing | EnergySage April 2026 |
| Typical solar-only payback — regular | About 12-14 years | This calculator; greenenergycalc (13.1) |
| Typical solar-only payback — LMI | Materially shorter ($3,000 rebate + higher export) | This calculator |
Before you commit:
- Reject any quote that includes a 30% federal credit. Repealed for 2026 purchases.
- Reject any quote that calls MS "1:1 net metering." Instantaneous netting credits exports at avoided cost + 2.5¢ adder, not retail.
- Reject any quote that includes SREC revenue. MS has no SREC market.
- Reject any quote that includes Solar for All funding. EPA terminated the program nationwide in 2025.
- Verify which customer class you're in before sizing. LMI program is income-qualified only (≤225% federal poverty, first 1,000 per IOU). Use the income-qualified toggle on the calculator to compare.
- VERIFY YOUR UTILITY'S TARIFF IN WRITING if you're not on Entergy MS or Mississippi Power. Co-ops are NOT bound by PSC Docket 2011-AD-2 — many pay avoided cost only, some pay nothing.
- Don't accept sales tax exemption without statute citation. Likely 7% applies (about $1,500-1,600 added cost). MDA's industrial / business exemption does NOT cover residential rooftop.
- Don't bank on property tax exemption. No primary source confirms for residential. Verify with your county.
- Don't oversize. Instantaneous netting punishes export. Match annual production to consumption.
- Load-shift toward daylight. Self-consumption at about $0.112 vs export at about $0.055 is a roughly 2x swing.
- If income-qualified, claim the $3,000 LMI rebate OR the $2,000 battery rebate (not both). Verify enrollment slot availability — program is capped.
- Battery for resilience, not ROI. Gulf hurricanes + tornado risk + summer storms are the real case.
- If on Mississippi Power, watch RENM-3 status. It would modestly improve economics if adopted.
Estimates only — PSC DG values can update with each PSC order, Mississippi Power RENM-3 adoption status is unconfirmed as of mid-2026, LMI program enrollment is capped (first 1,000 per IOU; program funding caps $10M Entergy / $5M Miss Power per year), co-op tariffs vary widely and are not subject to PSC Docket 2011-AD-2. Verify with the Mississippi Public Service Commission, your specific utility (Entergy Mississippi, Mississippi Power, or your co-op), the Mississippi Department of Revenue for sales / property tax confirmation, and greenenergycalc / MS AG Consumer Guide for current incentive listings. This is not financial advice.