Solar Panel Cost in Mississippi: $2.29/W, 24.5-Year Payback

Solar in Mississippi costs about $18,320 for 8 kW at $2.29/W and pays back in roughly 24.5 years at 14.5¢/kWh with the federal credit at $0.

Updated September 2026 · Source: EIA Electric Power Monthly Table 5.6.A (July 2026 data) · next EIA update ~Oct 23

By SolarCostData Data Desk · Reviewed September 2026 · Corrections log

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Why this number

Solar panels in Mississippi cost about $2.29 per watt — $18,320 for a typical 8 kW system — and pay back in roughly 24.5 years at the state’s 14.5¢/kWh average rate, with the 2026 federal credit at $0. Net billing pays exports below retail here.

Everything below uses Mississippi’s real average residential electricity rate (14.5¢/kWh, EIA) and a production band of about 1,390 kWh per kW per year. Both are stated openly because they are the two inputs that decide the answer. These are estimates for sanity-checking a quote, not a quote.

Run it with your own numbers

Why Mississippi’s payback lands where it does

Mississippi’s July 2026 rate of 14.5 cents per kilowatt-hour ranks 39th nationally, a cheap grid even after rising about seven percent from 13.58 cents the year before. Good sun — yield of 1,390 kilowatt-hours per installed kilowatt is above the national middle — isn’t quite enough to compensate for such a low rate, and the payback lands around 24.5 years. Entergy Mississippi, the largest utility with nearly 385,000 residential customers, actually charges below the state average at 13.2 cents, so its own customers face a payback stretching past the 24.5-year statewide figure, while Mississippi Power’s territory, at 14.5 cents, comes closer to it. Mississippi pays for exports under net billing rather than at the full retail rate, so the constraint on solar economics here is doubled up — a low starting rate and a thin export credit both push against a fast payback, with self-consumption doing what work there is to do.

Electric utilities in Mississippi

The state average hides real spreads between utilities. The largest residential utilities EIA-861 lists for Mississippi, with each one’s own average bundled residential price (2024 — revenue ÷ sales, the audited annual figure, not this month’s tariff):

Your utility decides Mississippi’s real number — the ZIP lookup finds it in three clicks; the 2024 annual utility averages above sit apart from the June-2026 monthly 14.5¢ state figure.

Mississippi’s rate, the last 24 months

July 2025 → July 2026: 13.58¢ → 14.54¢. The rate tracker has every month against the US average.

An 8 kW system in Mississippi, priced out

The $2.29/W used above comes from EnergySage marketplace quotes (August 2026). Those are quotes in a competitive online market, not signed contract prices.

Read that table with one caveat: $2.29/W is Mississippi’s market average, and it is the input most likely to differ for you. A quote $0.50 per watt above or below the $2.29 used here moves the payback by roughly a year and a half in either direction.

How much sun Mississippi actually gets

A kilowatt of panels in Mississippi produces about 1,390 kWh a year on an unshaded, south-facing roof at a 20-degree pitch. Sites that swap Mississippi’s 1,390 kWh for a single national average are how Arizona and Washington end up with identical paybacks despite a 1.6x real difference in output.

That figure is a five-point cluster around Mississippi’s largest metro area, which keeps it representative of where most people actually live rather than of the state’s best site.

Two adjustments matter before you apply this to your own roof:

• Shading and orientation. The 1,390 kWh figure assumes an unobstructed south-facing array. A real Mississippi roof — its own azimuth and pitch, a tree or a chimney — typically produces 10-25% less; this page models 90% of the ideal, so the 10,008 kWh/year above is already derated from 11,120. A genuinely unshaded south roof can adjust upward in the calculator.
• Year-to-year weather moves output by roughly ±5% either way.

How Mississippi compares with the other 49

Mississippi ranks 39th of 50 on electricity price and 37th on annual output value per kW installed — close enough that its rate is a fair proxy for its solar case, which is not true everywhere. Its immediate neighbors on price are Washington (14.7¢) just above and Wyoming (14.4¢) just below.

Oklahoma is Mississippi’s closest comparable-rate analogue — 14.3¢/kWh, roughly 1,475 kWh per kW, and a payback within about a year of this one (24.0 vs 24.5 years). If you find Mississippi quotes hard to sanity-check, Oklahoma numbers are broadly transferable.

Net billing: the rule that decides solar in Mississippi

Mississippi does not credit exports at the retail rate — this is net billing , not net metering. The program is Mississippi PSC rule, in force since 2015-12, and it credits surplus power at a published rate of 2.50¢/kWh — against a retail rate of 14.5¢.

Because a typical Mississippi home uses only about 40% of its generation as it is produced, most of what the panels make is sold at 2.5¢. That is why the payback above is 24.5 years rather than the 12.4 years the same hardware would return under full-retail net metering. Raising self-consumption — a battery (worth its own arithmetic: is a home battery worth it? ), an EV charged in daylight, daytime occupancy — is the lever that closes the gap. Whether a Mississippi buyer should own a battery or take a lease/TPO deal is priced in the battery buy vs. TPO calculator .

The 2.5c figure is an adder; whether it remains in force was not confirmed.

One limit worth knowing: this reflects investor-owned, state-regulated utilities; Mississippi’s municipal utilities and co-ops are exempt in most cases and set their own terms.

What is actually left in Mississippi

The 30% federal credit ended for systems completed after December 31, 2025, so it is $0 here as everywhere. What remains is state, utility and local — and it varies far more than the federal rule ever did.

Do not budget for Battery Storage Incentive. Suspended.

Tax exemptions

There is no property-tax exemption, so a system may raise your assessed value. Ask your assessor what it would add.

If that list looks thin, it is — the solar incentives hub shows which states still put real money on the table, and where Mississippi sits among them.

Is solar worth it in Mississippi at 14.5¢/kWh?

Mississippi has decent sun and cheap electricity, which is a frustrating combination for solar. The panels will produce; what they produce simply is not worth much at 14.5¢/kWh.

At a horizon that long, owning the roof is not the only route to cheaper power. Community solar versus rooftop walks through the subscription alternative — no roof, no loan, and no 24.5-year wait — which is worth reading before committing capital in a market like Mississippi’s.

If you want a fast gut check before running the numbers above, the should-I-go-solar screener asks the four questions that matter most in a low-rate state like Mississippi.

Two numbers put that in context. At Mississippi’s rate, the electricity an 8 kW system would produce is worth about $732 a year, so the system costs roughly 25.0 years of that output to buy outright — a simple division, before costs. The headline 24.5-year figure above is the full model: it additionally counts 2.5%/yr rate inflation, $150/yr of running costs and one inverter replacement, which is why the two differ slightly. And doing nothing is not free: 25 years of that same electricity, with rates rising at 2.5% a year, comes to about $49,700.

For a 15-year payback in Mississippi — given its sunshine rather than a national average — the electricity rate would need to be about 12.7¢/kWh. Mississippi is at 14.5¢, which is above that line.

Sources and method

• Electricity rate: U.S. Energy Information Administration, average price by state — EIA Table 5.6.A, July 2026 data (released Sep 2026). Rate shown is Mississippi’s residential average.
• Production: PVGIS v5.2 with the PVGIS-NSRDB radiation database, 1,390 kWh/kW for a five-point cluster around Mississippi’s largest metro, then the 90% real-roof factor; the assumptions, the ERA5 cross-check and the attribution are on the methodology page .
• Incentives: DSIRE — Database of State Incentives for Renewables & Efficiency, NC Clean Energy Technology Center. Verify current amounts and fund status before relying on them.
• Federal credit status: IRS, Residential Clean Energy Credit . See our 2026 energy tax credit guide .
• Payback model: shared with the solar savings calculator — 2.5%/yr utility inflation, 0.5%/yr degradation, federal credit $0.

Mississippi’s rate (14.5¢, EIA Table 5.6.A, July 2026 data (released Sep 2026)), export regime, production factor, installed cost and programs were last verified on 25 September 2026; Mississippi’s export credit resets on its tariff cycle and incentive budgets run out mid-year, so confirm current terms before acting. Not tax or financial advice.

Frequently asked questions

How we calculated this

Worked for Mississippi: 8 kW × 1,000 × $2.29/W = $18,320 gross (federal credit $0, so net before state incentives); 10,008 kWh a year × the blended kWh value at 14.5¢ retail and 2.5¢ export ≈ $732 year-1 saving; payback ≈ $18,320 ÷ $732 = 24.5 years with 2.5%/yr rate growth, 0.5%/yr degradation and one inverter replacement in the 25-year model.

Sources: U.S. Energy Information Administration (EIA) electricity rates · DSIRE incentive records · public IRS/OBBBA guidance. Figures are modeled estimates, not quotes or tax advice. See our methodology.

States with a comparable tariff picture

• Why is my electric bill so high? — Splits a bill jump into weather, rate and usage — with Mississippi’s own EIA rate history built in.
• Electricity rate tracker — Mississippi’s last 24 months of EIA rates, charted against the US average.
• Find your rate by ZIP — Mississippi averages hide utility gaps — look yours up from EIA-861 in three clicks.
• Net metering by state (2026 table) — Every state’s export regime with program, date and source — the rule behind Mississippi’s payback.
• Solar panel cost in Arkansas — Same export regime at 14.3¢/kWh and a 23.0-year payback — the closest tariff comparison to Mississippi.
• Solar panel cost in North Carolina — Same export regime at 15.2¢/kWh and a 21.4-year payback — the closest tariff comparison to Mississippi.
• Solar panel cost in Kentucky — Same export regime at 13.8¢/kWh and a 22.6-year payback — the closest tariff comparison to Mississippi.