Trevor has worked in home improvement and residential solar since 2016 and maintains the EcoGen Solar Cost Index.
Louisiana builds the biggest home solar systems in the country and pays some of the smallest export rates. Households here consume a massive 1,202 kWh a month, mostly air conditioning, so the typical array is 9.68 kW and costs about $25,942 even at the state’s competitive $2.68 per watt. Exports, meanwhile, earn avoided-cost rates like Entergy Louisiana’s 3.86¢ per kWh against a retail price modeled at the 13.07¢ statewide average. On paper that combination looks rough. In practice, Louisiana has a quiet structural advantage no tariff sheet shows: the state’s cooling load peaks exactly when solar produces, which pushes natural self-consumption higher than almost anywhere. This guide prices both the paper and the practice.
The spread of sizes at the benchmark, gross before incentives, with the production Louisiana sun delivers at roughly 1,490 kWh per kilowatt:
System size | Gross cost at $2.68/W | Estimated yearly production (kWh) |
|---|---|---|
6 kW | $16,080 | About 8,940 |
8 kW | $21,440 | About 11,920 |
9.68 kW, the typical Louisiana system | $25,942 | About 14,420 |
10 kW | $26,800 | About 14,900 |
12 kW | $32,160 | About 17,880 |
The Rules Since 2020: Retail In, Avoided Cost Out
Under the LPSC’s 2019 general order (effective January 1, 2020), all commission-regulated utilities bill solar homes at retail for what they draw and credit exports at avoided cost, the trailing 12-month average wholesale energy price, updated annually, with credits carrying forward and cashing out on the final bill. The 2026 residential export rates on file include Entergy Louisiana at 3.86¢ per kWh (effective April 1, 2026), with Cleco and the other utilities filing their own figures in the same range. One carve-out matters: Entergy New Orleans, serving about 9% of the state’s homes, is regulated by the New Orleans City Council rather than the LPSC, so Orleans Parish residents should confirm their own rules before using any number on this page.
Louisiana is one market of fifty; the full national pricing picture shows where it lands.
Why Louisiana Self-Use Runs Naturally High
The math punishes exports, but Louisiana’s load curve fights back. Air conditioning drives the state’s enormous consumption, and it runs hardest in the same hours panels produce hardest. A home cooling itself through a July afternoon is consuming its own solar in real time, no batteries or behavior change required. That alignment is why a Louisiana household’s realistic self-use share often lands well above what an empty-nest home in a mild climate could manage, and why the state’s payback, while slow, beats what its 3.86¢ export rate implies at first glance.
See how your cooling load changes the math
The Real Range on a $26,000 System
The typical 9.68 kW array produces about 14,420 kWh a year in New Orleans-class sun. If every kilowatt-hour offset retail at the 13.07¢ statewide average, the value would be about $1,885 a year, a 13.8-year floor. A household using two-thirds directly (a realistic figure for an AC-heavy home) and exporting the rest at avoided cost models closer to $1,420 a year, around 18 years. Your position in that range is set by your cooling habits, your daytime occupancy, and whether you size the system to your usage or your roof. Rates rising 3.66% a year help steadily. Batteries help too, converting 4¢ exports into 13¢ self-use, but at Louisiana’s spread they should be priced as their own decision, not assumed.
That floor runs on the statewide average, which is ranking context rather than a billed rate. Entergy Louisiana, Cleco and SWEPCO each file their own residential rates, so rerun the math with the rate on your own bill.
Buying Rules for the Biggest Systems in America
Size discipline matters more here than anywhere: at 9-10 kW typical, a 15% oversize is a four-figure mistake that earns 3.86¢ forever. Hold bids to the $2.68 benchmark, rank 11 nationally, and demand itemized reasons for anything above it. Roof condition is non-negotiable in hurricane country; if the decking or shingles have under 12 years left, reroof first. One more financing note: solar leases are explicitly allowed in Louisiana while PPA status is unclear, so a lease is the practical third-party route to the federal 48E credit now that the residential credit is $0 for host-owned systems whose installation is completed after December 31, 2025.
When Louisiana Solar Does Not Pay
- Mild-usage homes. Without the big AC load, you lose both the self-use alignment and the offset volume; the math thins fast below about 900 kWh a month.
- Export-first designs. Any proposal celebrating how much power you will sell is selling you 3.86¢ dreams billed at $2.68 per watt.
- Aging roofs in wind zones. A mid-payback removal and reinstall for a reroof erases years of savings.
- Orleans Parish buyers using LPSC numbers. Different regulator, potentially different math; confirm first.
Louisiana Solar Cost FAQs
How much do solar panels cost in Louisiana in 2026?
About $2.68 per watt installed, rank 11 nationally, as of March 1, 2026. Louisiana’s heavy household usage makes typical systems the largest in the country, about 9.68 kW and $25,942 before incentives.
Does Louisiana have net metering?
Not since 2020 for new customers. LPSC-regulated utilities bill imports at retail and credit exports at avoided cost, updated annually; Entergy Louisiana’s 2026 residential export rate is 3.86¢ per kWh. Entergy New Orleans is regulated separately by the City Council.
What is the solar payback period in Louisiana?
Between about 14 years (everything self-consumed) and 18 years (a third exported at avoided cost). Louisiana’s AC-heavy load naturally pushes self-use high because cooling demand peaks in the same hours panels produce, which is the state’s quiet advantage.
Can I lease solar panels in Louisiana?
Yes. Solar leases are explicitly allowed in Louisiana while PPA status is unclear, which makes a lease the practical third-party route to the federal 48E credit now that the residential credit no longer exists for host-owned systems.
Are the solar rules different in New Orleans?
They can be. Entergy New Orleans is regulated by the New Orleans City Council, not the LPSC, so Orleans Parish households should confirm their utility’s current solar terms directly before relying on statewide figures.
Your cooling load is the biggest number in your math. Enter your ZIP code and we will start from what your house actually uses.
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Methodology: Cost figures in this guide use the EcoGen Solar Cost Index for Louisiana, $2.68 per watt as of March 1, 2026, with payback bounds modeled with no federal residential credit for host-owned systems, exports at filed avoided-cost rates, rate escalation at the state 5-year average of 3.66%, 0.5% annual panel degradation, and a 25-year horizon.
References & Research Sources
EcoGen America reviewed Louisiana Public Service Commission distributed generation orders and avoided-cost schedules, federal electricity price and utility datasets, Census home-value data, federal tax guidance, and state PPA-legality research for this Louisiana solar cost guide. Sources were accessed between June 10 and August 15, 2026, unless another date is listed below.
- Louisiana Public Service Commission (LPSC). General Order 09-19-2019: Distributed Generation. Net billing framework crediting exports at annually redetermined avoided cost. Effective January 1, 2020. Accessed June 10, 2026.
- Louisiana Public Service Commission (LPSC). 2026 Avoided-Cost Rate Schedule. Residential export rates for Entergy Louisiana, Cleco, and SWEPCO. Effective March and April 2026. Accessed June 11, 2026.
- U.S. Energy Information Administration (EIA). Electric Power Monthly, Table 5.6.A. Average residential electricity prices by state, March 2026 edition. Accessed June 10, 2026.
- U.S. Energy Information Administration (EIA). Form EIA-861: Annual Electric Power Industry Report, 2024. Residential customer counts for Entergy Louisiana, Cleco, SWEPCO, and Entergy New Orleans. Accessed June 10, 2026.
- U.S. Census Bureau. American Community Survey, 2024. Median home value data used for cost-to-value context. Accessed June 11, 2026.
- Internal Revenue Service (IRS). One, Big, Beautiful Bill Provisions. Guidance on Public Law 119-21, including termination of the Section 25D residential credit for systems whose installation is completed after December 31, 2025. Accessed August 15, 2026.
- Database of State Incentives for Renewables & Efficiency (DSIRE). Third-Party Solar PV Power Purchase Agreement Policies, May 2026. State-by-state PPA legality map. Published May 2026. Accessed August 15, 2026.
