State solar profile · #28 of 51

Solar in Louisiana: slow payback despite sun

Louisiana's 17.8-yr modeled payback (#47 of 51) is on the slow side of the corpus; rates (10.2¢/kWh) and 2 programs decide whether sun (5.1 kWh/m²/day) still pays.

5.1
kWh/m²/day irradiance
10.2¢
avg electricity rate
17.8 yr
payback (#47)
2
incentive programs
27 Limited
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Form 860 capacity strip

Nameplate LA · Louisiana score #28/51

Louisiana | 27/100 | 17.8 yr payback | 1.1 GW

  • RANK 27/100
  • SUN #28/51
  • RATE 5.1 kWh
  • PAY 10.2c/kWh
  • CAP 17.8 yr
  • PROG 1.1 GW
  • NEM 2 programs
  • PHOTO near Virginia

Stamps derive from this state's NREL irradiance, EIA Form 860 / Electric Power Monthly nameplate, and DSIRE incentive row (score, rank, sun, rate, payback, capacity, programs, peer), not a quote or site assessment. Modeled figures use a typical 6 kW system; your roof, shading, and utility tariff decide the real return. See our disclaimer. Verify with EIA Form 860 → · Read with methodology → · Net-metering guide → · Personalized estimate → · All state rows → · States ranked → · Payback vs U.S. avg (14.2 yr): 3.6 yr slower

Modeled 6 kW payback · Louisiana and nearest peers

Shorter bars = faster simple payback on the NREL/EIA model

years

What this shows Louisiana sits at 17.8 years among nearest payback peers (3.6 yr slower vs the 14.2-yr U.S. average).

Source PlainSolarData model · NREL irradiance + EIA rates As of 2024

Slow-band 25-year ROI · Louisiana

$16,200

system cost

$911/yr

modeled savings

17.8 yr

break-even

+$6,575

25-year net

Slow-band math: $16,200 in vs $911/yr out. Check net-metering (full) and program stack before treating the 25-year net as settled. Run a personalized estimate →

Installed solar capacity in Louisiana, 2017–2024

Total solar nameplate capacity in Louisiana reported to the EIA, utility-scale and reported distributed systems. The number of reporting facilities grew 13x (1 to 13) between 2017 and 2024, and the average site size grew from 1 MW to 82 MW per site, a shift toward larger utility-scale installations.

0 MW500 MW1.0 GW1.5 GW 20172018201920202021202220232024 1.1 GW
Louisiana now has about 1.1 GW of installed solar capacity across 13 reported facilities.

Source: U.S. Energy Information Administration, installed solar nameplate capacity As of 2024

Louisiana: sunny but slow to break even

Irradiance 5.1 kWh/m²/day (at/above the 4.8 national mean) vs 17.8-yr payback (slow band vs 14.2-yr mean). Crosshairs mark those means.

Modest sun · fast payback (high rates)Sun + speedModest sun · slowSunny but slow (cheap power)3.24.15.05.86.74.1 yr10.0 yr15.9 yr21.8 yr27.7 yrSolar irradiance (kWh/m²/day) →← Faster payback (years)HI, Solar irradiance (kWh/m²/day) →: 5.9 · ← Faster payback (years): 5.2 yrCA, Solar irradiance (kWh/m²/day) →: 5.8 · ← Faster payback (years): 6.3 yrAZ, Solar irradiance (kWh/m²/day) →: 6.5 · ← Faster payback (years): 10.3 yrNM, Solar irradiance (kWh/m²/day) →: 6.4 · ← Faster payback (years): 10.3 yrNV, Solar irradiance (kWh/m²/day) →: 6.2 · ← Faster payback (years): 11.9 yrTX, Solar irradiance (kWh/m²/day) →: 5.7 · ← Faster payback (years): 11.8 yrFL, Solar irradiance (kWh/m²/day) →: 5.6 · ← Faster payback (years): 12 yrCO, Solar irradiance (kWh/m²/day) →: 5.5 · ← Faster payback (years): 12.3 yrCT, Solar irradiance (kWh/m²/day) →: 4.1 · ← Faster payback (years): 8.9 yrMA, Solar irradiance (kWh/m²/day) →: 4.2 · ← Faster payback (years): 9.2 yrUT, Solar irradiance (kWh/m²/day) →: 5.9 · ← Faster payback (years): 14.5 yrNY, Solar irradiance (kWh/m²/day) →: 4.4 · ← Faster payback (years): 11.1 yrRI, Solar irradiance (kWh/m²/day) →: 4.2 · ← Faster payback (years): 9.7 yrME, Solar irradiance (kWh/m²/day) →: 4.3 · ← Faster payback (years): 9.3 yrNH, Solar irradiance (kWh/m²/day) →: 4.2 · ← Faster payback (years): 9.8 yrNJ, Solar irradiance (kWh/m²/day) →: 4.5 · ← Faster payback (years): 12.8 yrSC, Solar irradiance (kWh/m²/day) →: 5.2 · ← Faster payback (years): 14 yrNC, Solar irradiance (kWh/m²/day) →: 5.2 · ← Faster payback (years): 14.4 yrKS, Solar irradiance (kWh/m²/day) →: 5.2 · ← Faster payback (years): 13.7 yrDC, Solar irradiance (kWh/m²/day) →: 4.4 · ← Faster payback (years): 13 yrGA, Solar irradiance (kWh/m²/day) →: 5.3 · ← Faster payback (years): 14.5 yrVT, Solar irradiance (kWh/m²/day) →: 4.1 · ← Faster payback (years): 11.5 yrMD, Solar irradiance (kWh/m²/day) →: 4.5 · ← Faster payback (years): 14.3 yrMT, Solar irradiance (kWh/m²/day) →: 5 · ← Faster payback (years): 16.3 yrOK, Solar irradiance (kWh/m²/day) →: 5.3 · ← Faster payback (years): 15.5 yrIL, Solar irradiance (kWh/m²/day) →: 4.3 · ← Faster payback (years): 14 yrWY, Solar irradiance (kWh/m²/day) →: 5.5 · ← Faster payback (years): 15.3 yrLA, Solar irradiance (kWh/m²/day) →: 5.1 · ← Faster payback (years): 17.8 yrVA, Solar irradiance (kWh/m²/day) →: 4.8 · ← Faster payback (years): 15 yrMN, Solar irradiance (kWh/m²/day) →: 4.4 · ← Faster payback (years): 15.9 yrTN, Solar irradiance (kWh/m²/day) →: 4.9 · ← Faster payback (years): 16.7 yrAL, Solar irradiance (kWh/m²/day) →: 4.9 · ← Faster payback (years): 14.4 yrAR, Solar irradiance (kWh/m²/day) →: 4.8 · ← Faster payback (years): 17.2 yrDE, Solar irradiance (kWh/m²/day) →: 4.5 · ← Faster payback (years): 15.4 yrMO, Solar irradiance (kWh/m²/day) →: 4.8 · ← Faster payback (years): 15.6 yrND, Solar irradiance (kWh/m²/day) →: 4.8 · ← Faster payback (years): 18.2 yrOR, Solar irradiance (kWh/m²/day) →: 4.5 · ← Faster payback (years): 16.9 yrPA, Solar irradiance (kWh/m²/day) →: 4.3 · ← Faster payback (years): 14.2 yrWI, Solar irradiance (kWh/m²/day) →: 4.3 · ← Faster payback (years): 14.2 yrMS, Solar irradiance (kWh/m²/day) →: 5 · ← Faster payback (years): 15.7 yrNE, Solar irradiance (kWh/m²/day) →: 5 · ← Faster payback (years): 16.4 yrSD, Solar irradiance (kWh/m²/day) →: 5 · ← Faster payback (years): 17.1 yrIA, Solar irradiance (kWh/m²/day) →: 4.5 · ← Faster payback (years): 16.7 yrKY, Solar irradiance (kWh/m²/day) →: 4.5 · ← Faster payback (years): 17.7 yrID, Solar irradiance (kWh/m²/day) →: 4.7 · ← Faster payback (years): 20 yrMI, Solar irradiance (kWh/m²/day) →: 4 · ← Faster payback (years): 14.4 yrOH, Solar irradiance (kWh/m²/day) →: 4.2 · ← Faster payback (years): 16.3 yrWV, Solar irradiance (kWh/m²/day) →: 4.2 · ← Faster payback (years): 19.4 yrIN, Solar irradiance (kWh/m²/day) →: 4.4 · ← Faster payback (years): 15.8 yrWA, Solar irradiance (kWh/m²/day) →: 3.5 · ← Faster payback (years): 26.6 yrAK, Solar irradiance (kWh/m²/day) →: 3.4 · ← Faster payback (years): 17 yr
Louisiana (highlighted): 5.1 kWh/m²/day, 17.8-yr modeled payback - slower than the national average.

Source: PlainSolarData model, NREL irradiance + EIA rates As of 2024

Solar & grid details

Net-metering policy
full
Renewable portfolio standard
None
Installed cost / watt
$2.70/W
Annual production (6 kW)
8,935 kWh
Installed capacity (EIA 2024)
1.1 GW

Top incentive programs

2 programs available for Louisiana residents

Tax exemption LA Solar Property Tax Exemption · Property tax exemption Net metering LA Net Metering · Retail rate credit

All Louisiana solar incentives (2)

Tax exemption

LA Solar Property Tax Exemption

Property tax exemption

Solar energy systems are exempt from local property taxes in Louisiana.

 Net metering

LA Net Metering

Retail rate credit

Louisiana IOUs offer full retail net metering for systems up to 25 kW.

Slower-payback neighbors for Louisiana

Two non-geographic peer sets for Louisiana: composite score neighbors and payback-year neighbors (deduped so each row links a distinct comparison).

Similar composite solar score

Nearest nationwide matches on the NREL/EIA/DSIRE blend (27/100 here).

Similar modeled payback

Nearest payback-year peers nationwide (17.8 yr modeled here).

Peers are nearest-neighbor matches on published composite scores and modeled 6 kW payback years; rankings above use the same fields but sort the full corpus.

Solar resource from NREL; electricity rates and installed capacity from the U.S. EIA; incentive programs from DSIRE. See our methodology.

Compiled from official public sources by the publisher.