Set per utility, reset every year
The Commission publishes an Avoided Cost Rate by Electric Utility, with tables posted for successive years. So there is not one Louisiana avoided cost rate, there is one per utility per year.
Shreveport is in a different utility territory from Baton Rouge or Lafayette, so a figure borrowed from elsewhere in the state is not yours.
And because the rate is republished annually, a figure from an older guide may not be the one you would receive now, let alone the one you would receive in ten years.
Confirm the current published rate for your own utility directly, and ask which figure the projection used and from which year.
How a projection should handle a moving rate
Ask what the model assumed about the avoided cost rate across its term. A model holding the current figure flat for twenty-five years is making an assumption about future wholesale prices that should at least be stated.
Ask for the projection with the export rate reduced, by a quarter and by half, so you can see how much of the case depends on a number nobody has promised you.
Then ask what proportion of the projected savings comes from avoided purchases rather than from exports. The avoided purchase portion is unaffected by any change to the avoided cost rate, so a design weighted toward it is insulated.
That last question is the most useful one, because it converts an abstract worry about rate risk into a number you can act on by changing the design.
Designing to reduce the exposure
Sizing is the main lever. A system matched to what your household uses during daylight exports less, so less of its value rides on a rate that is reset annually.
Load shifting is the free lever. Dishwasher, laundry, pool pump and electric vehicle charging moved into daylight all convert exports at avoided cost into avoided purchases at retail.
Storage does the same at scale and, under a four-to-one gap between retail and avoided cost, does genuine arbitrage rather than only providing resilience.
Ask for the system modelled with and without storage so the incremental value appears as its own number, and ask what round-trip losses the model assumed.
What is left to build the number from
The 30 percent federal Residential Clean Energy Credit under Section 25D expired for property placed in service after December 31, 2025, and Louisiana state solar tax credit expired on December 31, 2017.
Section 48E survives at 30 percent for third-party owners under leases and power purchase agreements, so ask what a provider claims and what reaches you in the rate.
What exists is the property tax exemption, full retail value for self-consumed generation, and avoided-cost compensation for exports at your own utility currently published rate.
Ask for that rate confirmed for your utility and year, the export portion of the savings identified separately, and the projection stress-tested with the export rate reduced.