Louisiana offered retail-rate net metering to residential solar customers until 2020. The Louisiana Public Service Commission changed course that year, ending the requirement for investor-owned utilities to credit solar exports at full retail rates for new customers. Entergy Louisiana — which serves Baton Rouge and most of the Capital Region — transitioned new solar customers to a net billing framework in which excess solar electricity exported to the grid is credited at Entergy’s avoided-cost rate rather than the retail rate.
The avoided-cost rate represents what it would cost Entergy to generate or procure that kilowatt-hour on the wholesale market — far below the retail rate that includes distribution, transmission, and other charges. The LPSC sets and publishes avoided-cost rates by utility annually; Entergy Louisiana’s avoided-cost rate runs approximately 2–3¢ per kilowatt-hour as of 2026. At Entergy’s approximately 12¢ retail rate, this means Baton Rouge solar homeowners earn roughly 17–25% of retail value for exported electricity — a dramatic reduction from the 1:1 retail credit that solar owners in Virginia, New York, New Jersey, and Florida receive.
The practical design implication for Baton Rouge solar is the same as California under NEM 3.0: maximize self-consumption and minimize exports. Every kilowatt-hour your system produces and your home uses directly offsets grid electricity at 12¢ retail value. Every kilowatt-hour you export earns only 2–3¢. A system sized precisely to annual consumption, combined with battery storage that shifts midday surplus to evening self-consumption, maximizes the share of production captured at retail value and minimizes the share lost to the low export rate.
Baton Rouge’s solar financial case requires the same direct framing as Tacoma, Washington — where the rate was low, and Washington, Louisiana demands honest ROI discussion — where the export compensation is low. At Entergy’s 12¢ retail rate and a 2–3¢ avoided-cost export rate, without the federal residential ITC that expired December 31, 2025, Baton Rouge cash-purchase payback estimates run approximately 15–25 years for systems without battery storage — beyond most homeowners’ comfort threshold for a major investment. Battery storage improves this by increasing self-consumption: a solar-plus-battery system that self-consumes 80–85% of production shifts more kilowatt-hours from the 2–3¢ export rate to the 12¢ retail offset value, materially improving payback. Industry sources model solar-plus-battery payback in Baton Rouge at approximately 14–18 years for well-designed systems under current conditions — still longer than most other markets in this dataset.
Two factors can improve this picture. First, Entergy Louisiana’s rate trajectory. Louisiana’s electricity rates have been rising, driven by natural gas price volatility, storm recovery costs after repeated hurricane impacts, and grid modernization spending. Each Entergy rate increase improves the value of every kilowatt-hour self-consumed. A 3% annual rate increase assumption — historically conservative for Louisiana — reduces the effective payback period significantly over a 25-year horizon, bringing the best-case scenario into a range many homeowners find acceptable. Second, solar leases and PPAs are available in Louisiana, and the installing company’s commercial ITC (Section 48/48E, available through 2027 for third-party system owners) reduces system cost and can be passed through in lower monthly rates — making the lease/PPA pathway more competitive relative to cash purchase in 2026 than it was when homeowners could directly claim the residential ITC.
Baton Rouge’s exposure to Gulf of Mexico hurricanes and tropical weather events creates a resilience case for solar-plus-battery storage that is genuine and separate from any financial ROI calculation. Louisiana experienced catastrophic grid damage from Hurricanes Ida (2021), Laura (2020), and Zeta (2020) in recent years, with some Baton Rouge area neighborhoods losing power for days to weeks. A solar-plus-battery system provides backup power during extended outages, maintaining essential loads — refrigeration, medical equipment, lighting, communications, a window AC unit — when the Entergy grid is down. The resilience value of backup power during hurricane season has real household utility that is not captured in standard payback calculations. For Baton Rouge homeowners who have experienced multi-day outages and value energy independence during storm events, the solar-plus-battery case rests as much on resilience as on bill savings. Louisiana provides a 100% property tax exemption on solar systems, and no state income tax (Louisiana does have income tax — note Louisiana has a 4.25% top income tax rate, but no solar tax credit). Louisiana’s property tax exemption prevents the installation from increasing annual East Baton Rouge Parish property taxes.
