Mississippi credits exported power at the utility’s avoided cost plus a 2.5¢ per kilowatt-hour distributed generation adder, and a further 2.0¢ for households below an income threshold. It is a deliberate decision to pay more than the power is worth on the market, and that adder is the reason Mississippi’s numbers work better than a tariff-only credit would.
What Actually Lands in Your Credit
The Mississippi Public Service Commission’s distributed generation rule, made in 2015 and amended in 2022, covers the investor-owned utilities. Under Entergy Mississippi’s NEM-2 tariff, in force for February 2026 billing, the credit is built in layers rather than set as one number.
Component | Standard household | Qualifying low-income household |
|---|---|---|
Avoided cost | 3.6¢ | 3.6¢ |
Distributed generation adder | 2.5¢ | 2.5¢ |
Low-income adder | Not applicable | 2.0¢ |
Total per exported kilowatt-hour | 6.1¢ | 8.1¢ |
Against the 14.95¢ statewide average residential rate (EIA, March 2026 edition), which is ranking context rather than a billed rate, that puts a standard Mississippi export at about 41% of retail and a qualifying low-income export at about 54%. Entergy Mississippi’s own residential rate is on your bill and in its filed schedule. The adder is doing real work.
The low-income threshold is household income at or below 225% of the federal poverty level, and it carries more than the adder: $3,000 toward installation and $2,000 toward a battery, available through 2027.
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What That Returns on a Typical System
A typical Mississippi installation runs 9.73 kW at about $25,098, producing roughly 13,875 kWh a year against household consumption of around 1,156 kWh a month. Installed cost is a competitive $2.58 per watt.
Household pattern | Annual value | Break-even |
|---|---|---|
Home most of the day, heavy summer cooling (about 85% of output used on site) | $1,890 | 13.3 years |
Mixed occupancy (about 60%) | $1,583 | 15.9 years |
Out during the day, evening-heavy (about 40%) | $1,338 | 18.8 years |
Methodology: EcoGen America calculation on a 9.73 kW system at $25,098 gross ($2.58 per watt, EcoGen Solar Cost Index as of March 1, 2026) producing 13,875 kWh a year, using the Entergy Mississippi NEM-2 credit of 6.1¢ and monthly netting. Output used on site is valued at the 14.95¢ statewide average as a stand-in for Entergy’s billed residential rate, so rerun your row with the rate on your own bill; the export side of every row is the 6.1¢ tariff credit. Figures are simple payback at year-one values against a 25-year equipment life, before financing, rate escalation and degradation, and they exclude the low-income incentives; a qualifying household would land materially better on both the 8.1¢ credit and the $3,000 installation payment.
Without a battery, a house that is empty on weekdays lands in the 30% to 50% band; daytime cooling, a pool pump or working from home pushes it toward the top row.
Mississippi Power’s RENM-3 tariff uses the same avoided-cost-plus-2.5¢ structure with a seasonal avoided-cost component; the current values are on its filed schedule, so ask for them in writing. Because the adder is fixed and only the avoided-cost component moves, a lower avoided-cost component moves the bottom row by roughly a year and the top row by weeks.
The 5.5-year spread between the top and bottom rows is narrow for a net-billing state, and the adder is why. When exports earn 41% of retail rather than 25%, the penalty for being out of the house during the day shrinks accordingly.
Two Limits That Shape the System You Can Build
Mississippi constrains sizing more tightly than most states, and both limits are worth knowing before an installer designs anything.
- 20 kW DC maximum, and no more than 110% of your prior year’s usage. The second is the binding one. It means a system cannot be sized for the electric vehicle or heat pump you are planning, only for the consumption you already have on record. If electrification is coming, the order of operations matters: add the load, build the usage history, then size the array.
- A cap of 3% of each utility’s peak demand. Participation is finite, so ask your utility whether capacity remains available this year before you commit to a timeline.
One further detail that differs from some neighbors: the renewable energy certificates transfer to the utility. You do not keep them and cannot sell them, so any proposal treating certificate income as part of your return is wrong on Mississippi’s rules.
The Households This Does Not Suit
- If you are on a cooperative or a municipal system. The Commission’s rule reaches the investor-owned utilities only. Your on-site use still avoids your co-op’s retail rate; exports are worth only what your co-op’s own policy pays, with no state adder, so treat the bottom row as the optimistic case until you have your co-op’s export rate in writing.
- If you are moving inside about 13 years. That is the good case, and a mixed or daytime-empty house needs 16 to 19; if you sell before your row’s break-even, the arithmetic has to come from the buyer.
- If a proposal counts certificate income. The certificates go to the utility here, and their presence in a quote means the rest deserves checking.
- If a design exceeds 110% of your recorded usage. It will not be approved as drawn, and a redesign after signing is how timelines slip.
- If a quote shows a 30% federal credit. Section 25D is $0 for purchased systems whose installation is completed after December 31, 2025, under Public Law 119-21. Solar leases are permitted in Mississippi and residential power purchase agreements are restricted; a company that owns the system under a lease may qualify for the separate Section 48E business credit under current deadlines, and whether any of that value reaches your payment depends on the contract, so ask for both in writing.
For an Entergy Mississippi household that is home during the day, this is a workable case, and for a household under the income threshold it is better still, in a way almost no other state offers. Our Mississippi incentives guide covers the adders and the low-income program, and the Mississippi installer list covers who works here. If your household might qualify at or below 225% of the federal poverty level, establish that before you gather quotes.
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Mississippi Solar FAQs
For an Entergy Mississippi household that is home during the day, yes, at a simple payback around 13.3 years on our figures, stretching to about 18.8 years for a house that is empty through the day. Mississippi pays more for an exported unit than a tariff-only credit would, because the export credit is avoided cost plus a 2.5¢ distributed generation adder, reaching 6.1¢ against the 14.95¢ statewide average residential rate. A qualifying low-income household does better again.
Under the Public Service Commission’s distributed generation rule, made in 2015 and amended in 2022, exported power is credited at avoided cost plus a 2.5¢ per kilowatt-hour distributed generation adder. Households at or below 225% of the federal poverty level receive a further 2.0¢. At Entergy Mississippi that means 3.6¢ avoided cost plus 2.5¢ equals 6.1¢ for a standard household, or 8.1¢ for a qualifying low-income one, against the 14.95¢ statewide average residential rate.
Households at or below 225% of the federal poverty level qualify for an extra 2.0¢ per exported kilowatt-hour on top of the standard adder, plus $3,000 toward installation and $2,000 toward a battery, available through 2027. That combination is unusual: few states offer anything of the kind. If your household might qualify, establishing that before you gather quotes changes the numbers materially.
Up to 20 kW DC, and no more than 110% of your prior year’s usage. The second limit binds in practice: a system cannot be sized for an electric vehicle or heat pump you are planning, only for consumption already on record. If electrification is coming, add the load first, build the usage history, then size the array. There is also a cap of 3% of each utility’s peak demand, so ask your utility whether capacity remains available this year.
No. The certificates transfer to the utility, so you cannot hold or sell them and they generate no income for you. This differs from Arkansas, where the customer keeps them under the current tariff. Any Mississippi proposal that counts certificate income in your return is wrong on the state’s rules, and its presence is a reason to check the rest of the figures carefully.
References & Research Sources
EcoGen America reviewed the Entergy Mississippi NEM-2 tariff, in force since March 16, 2023 and current for February 2026 billing, for the avoided-cost component of 3.6¢ per kilowatt-hour, the 2.5¢ distributed generation adder giving a standard credit of 6.1¢, the additional 2.0¢ low-income adder giving 8.1¢ for households at or below 225% of the federal poverty level, the $3,000 installation and $2,000 battery incentives available to those households through 2027, the 20 kW DC system limit, the restriction to 110% of prior-year usage, 3% of each utility’s peak, the absence of any retail-rate export component and the transfer of renewable energy certificates to the utility; and the Mississippi Public Service Commission distributed generation and net metering rule made in 2015 and amended in 2022, which applies to the investor-owned utilities only, leaving cooperatives and municipal systems outside it. Mississippi Power’s RENM-3 tariff, effective May 27, 2025, uses the same avoided-cost-plus-2.5¢ structure with a seasonal avoided-cost component whose current values are on its filed schedule. We also reviewed EIA Electric Power Monthly for the 14.95¢ residential price and the five-year growth rate of roughly 3.51% a year, and IRS guidance on the Public Law 119-21 termination of Section 25D. Output of 1,426 kWh per kilowatt per year, 5.3 peak sun hours, the 9.73 kW system size, the $25,098 installed cost, the $2.58 per watt figure and the 1,156 kWh monthly usage are EcoGen America figures from the state cost benchmark. Sources accessed between June 10 and August 18, 2026.
