Scenario: a $125/month electric bill. Assumes 3%/yr rate increases, 0.5%/yr panel degradation and no federal tax credit (the 30% §25D credit ended for systems installed after Dec 31, 2025). How we calculate
Data approachEIA rates · NREL sun hours · 2026 federal policy · methodology
A $125/month electricity bill in Mississippi represents roughly 823 kWh per month at the state average rate of 15.19¢/kWh (EIA, Jan–Jul 2026 year-to-date). With 5.2 peak sun hours per day, offsetting that usage takes about a 6.3 kW solar system — roughly 16 panels at 400W — costing about $19,000 installed. Because the 30% federal tax credit ended for systems installed after 2025 and Mississippi has no statewide net metering — utility-dependent, simple payback is about 23.1 years, with an estimated $9,100 net over 25 years.
How Many Solar Panels for a $125 Electric Bill in Mississippi?
Mississippi electricity rates and sun hours change the math versus the US average. The sizing formula:
System size (kW) = Annual kWh ÷ (Peak sun hours × 365 × 0.82)
For a $125/month bill in Mississippi:
Annual usage: ~9,875 kWh/year
Peak sun hours: 5.2 h/day (Mississippi)
System size:6.3 kW DC (~16 × 400W panels)
Metric
Mississippi
US average
Rate
15.19¢/kWh
18.19¢/kWh
Sun hours
5.2 h/day
4.5 h/day
System size
6.3 kW
6.1 kW
Panels (400W)
16
16
Mississippi requires a similar system than the national average for the same dollar bill because higher consumption at lower rates. Use our solar system size calculator with your ZIP code for a roof-specific result.
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💰 System Cost
What Does Solar Cost for a $125/Month Bill in Mississippi in 2026?
At about $3.00/W installed (a blended 2026 US price; marketplace quotes often run lower), a 6.3 kW system in Mississippi costs about $19,000.
The 30% federal Residential Clean Energy Credit (IRC §25D) ended for systems installed after December 31, 2025, so a solar system you buy and install in 2026 gets no federal tax credit. Leases and PPAs are different: the installer that owns the system can still claim the commercial §48E credit for systems placed in service by the end of 2027 and may pass part of that value on through a lower monthly price.
Cost line
Amount
Installed cost (6.3 kW)
$19,000
Federal credit (25D) for 2026 installs
$0
Your cost before state/local incentives
$19,000
Getting three or more quotes matters more than ever without the federal credit: installed prices for the same system often differ by 20–30%.
📈 Payback Period
How Long Is Solar Payback on a $125 Bill in Mississippi?
Simple payback divides installed cost by first-year bill savings. Mississippi’s net-renewable rules credit exports well below retail for most customers. We therefore assume solar offsets about 55% of a $125/month bill in Mississippi — roughly $825/year — for a simple payback of about 23.1 years.
Over 25 years, with 3% annual rate increases and 0.5%/year panel degradation, cumulative bill savings minus the installed cost come to about $9,100. Because exported power earns little in Mississippi, a smaller system sized to your daytime use, or solar paired with a battery, usually pays back faster than a system sized to 100% of annual usage. Model your own numbers in our solar payback calculator.
Solar vs utility company · 25-year comparison
25-year totals for a $125/month electric bill: 3%/yr rate increases, 0.5%/yr degradation, no federal credit. Methodology
Mississippi Solar Incentives for a $125/Month Electric Bill
State and local incentives: Mississippi has no state solar tax credit; limited utility programs exist.
Net metering: Mississippi’s net-renewable rules credit exports well below retail for most customers.
Check DSIRE and our Mississippi solar page for current rebates, net metering rules, and utility-specific programs before signing an install contract.
⚡ System Size
Mississippi vs US Average: $125/Month Bill Comparison
Mississippi
US average
Monthly bill
$125
$125
System size
6.3 kW
6.1 kW
Installed cost
$19,000
$18,400
Bill offset assumed
55%
75% (blended)
Simple payback
23.1 yrs
16.3 yrs
25-year net savings
$9,100
$20,000
Bottom line: A $125/month bill in Mississippi is a weak solar candidate with about 23.1-year payback in 2026. Calculate your Mississippi savings or compare all states on the $125 bill hub.
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At Mississippi's average rate of 15.19¢/kWh and 5.2 peak sun hours, a $125/month bill (~9,875 kWh/year) typically requires a 6.3 kW system — about 16 panels at 400W each. Use our solar system size calculator with your ZIP for a roof-specific estimate.
A 6.3 kW system in Mississippi costs roughly $19,000 installed at about $3.00 per watt. The 30% federal tax credit (25D) ended for systems installed after December 31, 2025, so there is no federal credit for a system you buy in 2026. Mississippi has no state solar tax credit; limited utility programs exist.
At $19,000 installed and ~$825/year in bill savings, simple payback in Mississippi is about 23.1 years. Mississippi's net-renewable rules credit exports well below retail for most customers.
With about 23.1-year payback and roughly $9,100 in estimated 25-year net savings, a $125/month bill in Mississippi is a weak case for buying solar in 2026. Consider a smaller system, a battery, or a lease/PPA quote, and compare against efficiency upgrades first. See the [Mississippi solar page](/states/ms/) for net metering and incentive details.
The US average needs a 6.1 kW system at 16.3-year payback. Mississippi needs 6.3 kW with 23.1-year payback — driven by Mississippi's 15.19¢/kWh rate and 5.2 daily sun hours.
15.19¢/kWh — Mississippi average residential price. Source: EIA Electric Power Monthly, Table 5.6.B (year-to-date through July 2026), residential average retail price (July 2026) (EIA)
Solar production
5.2 peak sun hours/day × 0.82 system derate. Approximate state-average daily solar resource (peak sun hours) based on NREL solar resource data (NSRDB); not location-specific — use NREL PVWatts for an address-level estimate. (NREL PVWatts)
Installed price
$3.00 per watt before incentives. Blended 2026 US residential installed price used by this site; EnergySage marketplace reported about $2.60/W (mid-2026); full-market medians are higher.
Federal tax credit
$0 for homeowner-owned systems installed in 2026 — the 30% §25D credit ended Dec 31, 2025 (IRS)
Net metering
No statewide net metering — utility-dependent — solar assumed to offset 55% of the bill. Mississippi's net-renewable rules credit exports well below retail for most customers.
Estimates only — not tax, legal or financial advice. Get at least three installer quotes and confirm incentives with your utility and a tax professional.