Solar in Louisiana

Louisiana's residential solar policy is defined by the 2020 move to net billing. Exports are credited at each utility's avoided cost — roughly $0.03–0.05/kWh — well below the retail rate. Entergy Louisiana, Cleco Power, SWEPCO, and DEMCO each implement the net-billing structure with their own avoided-cost figure, and existing customers are generally grandfathered at the terms of their interconnection. The result is the same self-consumption pivot seen in net-billing states across the Sun Belt.

The state's stable residential incentive is the property tax exemption (LA Rev. Stat. 47:1705.2), which exempts solar systems from property tax on their added value. Louisiana's solar income tax credit expired in 2017 and has not been reinstated, and there is no sales tax exemption or SREC market. The federal Section 25D residential credit expired December 31, 2025; leased and PPA systems may still access Section 48E for projects that began construction before July 6, 2026.

The policy direction has been cautious rather than hostile, but the reduced export compensation and the absence of a state tax credit leave the case resting on raw resource and cheap hardware. Homeowners should model the system against their specific utility's avoided-cost rate, size for self-consumption, and treat battery storage primarily as resilience insurance against hurricane outages.

Louisiana's 5.5 peak sun hours are among the best in the Southeast, trailing only its Gulf Coast neighbors. The southern coastal parishes (New Orleans, Houma, Lafayette) routinely exceed the state average, while the northern tier near Shreveport runs marginally lower. Production is strongly summer-weighted, with hot, humid days driving peak output that aligns naturally with the state's heavy air-conditioning load. The main production drag is summer afternoon thunderstorm activity and the occasional tropical system that can cloud the state for days.

Because Louisiana's net-billing tariff compensates exports at only a few cents per kilowatt-hour, the design objective is unambiguous self-consumption. A system matched to daytime household load — particularly afternoon air-conditioning — captures the full ~$0.13/kWh retail value of every panel, while an oversized array exporting a large midday surplus earns back only the avoided-cost credit. West- and southwest-facing arrays that extend production into the late-afternoon cooling peak can outperform pure south-facing designs on dollars.

A practical Louisiana consideration is wind load: hurricane-zone permitting in the coastal parishes requires racking engineered to state wind standards, which can modestly increase installed cost but does not change the production fundamentals.

Louisiana's $2.60/W installed cost is among the lowest in the country, with a typical 8 kW system around $20,800 before incentives. The 30% federal residential credit (Section 25D) ended December 31, 2025, and Louisiana's own solar tax credit expired in 2017, leaving the property tax exemption (LA Rev. Stat. 47:1705.2) as the primary structural offset. The state offers no sales tax exemption and no SREC market.

Payback near 12.9 years on the 8 kW model is solid for a net-billing state with a low retail rate (~$0.13/kWh), driven by the convergence of abundant sun and low hardware cost. The self-consumed portion of production earns the full retail rate, which is what carries the case; the exported surplus earns only the avoided-cost credit. Households with high daytime air-conditioning consumption see faster payback than the state average.

Batteries are not subsidized in Louisiana, but the state's hurricane exposure gives storage a genuine resilience value that is harder to quantify but real — extended post-storm outages on the Gulf Coast have pushed many homeowners toward solar-plus-storage purely for backup, independent of the export economics.