Solar incentives Kentucky 2026: Cost, ROI and Financing Guide

Kentucky homeowners paid an average residential electricity rate of 15.02 cents per kWh in April 2026, up from 13.69 cents a year earlier, according to the U.S. Energy Information Administration (2026). That is still below the national average of 18.83 cents, but the 9.7% year-over-year increase is the real story. Kentucky has long enjoyed low rates thanks to a coal-heavy generation mix. Those rates are now rising, and solar is one of the few ways homeowners can lock in part of their energy cost.

This guide covers every active Kentucky solar incentive in 2026, how net metering differs by utility, and how to calculate real ROI without the federal residential tax credit. For installers, the winning proposal is the one that models the customer’s actual utility, export credit, and financing correctly. SurgePV’s solar design software and generation and financial tool let you do exactly that. You can build accurate, territory-specific proposals, generate professional solar proposals in minutes, then check pricing or book a demo. For the national picture, see our solar incentives in USA 2026 guide and state solar incentives in the US overview.

In this guide:

• How Kentucky net metering works and why it depends on your utility
• Duke Energy PowerPair details and who qualifies
• Solarize Louisville, Solarize Lexington, and other local programs
• KEDFA commercial incentives and KADF farm reimbursements
• Federal tax credit status for homeowners and businesses in 2026
• Financing options including loans, leases, PACE, and REAP
• Real 2026 cost and payback examples for homes and businesses
• Common mistakes and how to avoid them

Kentucky Solar Incentives at a Glance — 2026

Kentucky is not a high-incentive solar state, but it is not a no-incentive state either. The economics work because of decent sun, rising electricity rates, and a set of utility and local programs. The same system can have very different payback depending on whether the customer is served by LG&E, KU, Duke Energy, Kentucky Power, a cooperative, or a TVA utility.

Kentucky receives about 4.5 to 4.7 peak sun hours per day, according to Palmetto’s Kentucky solar guide (2026). A typical 8.91 kW home system can produce roughly 13,000 to 13,400 kWh per year. That production is enough to offset most or all of an average household’s usage, but the value of every kilowatt-hour depends on whether it is consumed on-site or exported to the grid.

How Kentucky Net Metering Works in 2026

Net metering is the billing mechanism that credits solar customers for surplus electricity sent to the grid. In Kentucky, state law requires investor-owned utilities and electric cooperatives — except TVA distribution utilities — to offer net metering for qualifying solar systems up to 45 kW, according to DSIRE’s Kentucky net metering summary (2026). S.B. 100, enacted in 2019, raised the cap from 30 kW to 45 kW and allowed IOUs to transition from full retail net metering to net billing with utility-specific credit rates.

The practical result is that Kentucky has three different solar value propositions depending on the utility.

LG&E and KU Energy: Full Retail Net Metering

Louisville Gas & Electric (LG&E) and Kentucky Utilities (KU) Energy currently offer full retail net metering. Excess kilowatt-hours sent to the grid earn a credit at the same rate the customer pays for electricity. That is the most favorable arrangement for solar owners.

Customers who began taking net metering service before September 24, 2021, receive energy credits in kilowatt-hours under the NMS-1 tariff. Customers who began on or after that date receive dollar-denominated bill credits under the NMS-2 tariff, according to LG&E and KU net metering service rules. Both tariffs credit exports at full retail value, though the billing mechanics differ.

Duke Energy Kentucky: Net Metering II

Duke Energy Kentucky moved new solar customers to Net Metering II in January 2025, following Kentucky Public Service Commission approval in November 2024, according to Palmetto’s Kentucky solar guide (2026). Under Net Metering II, excess energy sent to the grid is credited at a lower avoided-cost rate rather than the full retail rate. Customers who installed solar before January 2025 are grandfathered into the original full retail rate for 25 years.

Because exported power is worth less under Net Metering II, battery storage becomes more valuable. A battery stores daytime surplus for evening use, keeping more solar value at the full retail rate.

Kentucky Power

Kentucky Power reduced its net metering credit for new customers to approximately $0.09 per kWh, slightly below the full retail rate, according to Palmetto (2026). The exact rate should be confirmed with the current tariff. Like Duke customers, new Kentucky Power customers should prioritize self-consumption and consider battery storage.

Electric Cooperatives

Rural electric cooperatives in Kentucky must offer net metering, excluding those that buy power from the Tennessee Valley Authority. Co-op programs typically net production and consumption on a monthly basis and roll excess kilowatt-hour credits forward to the next monthly bill, according to DSIRE (2026). Individual co-op tariffs vary, so customers should confirm capacity limits, credit rates, and interconnection fees with their cooperative.

TVA-Served Utilities

TVA-served utilities in western Kentucky, including utilities such as Gibson, Pennyrile, Warren, and West Kentucky, are not required by state law to offer net metering. Some may offer voluntary buyback programs, but the terms are set by the utility. Customers in these territories should not assume full retail credits.

Duke Energy PowerPair: The Biggest Residential Rebate

The Duke Energy PowerPair program is currently the largest single residential solar incentive available in Kentucky for 2026. It offers a one-time upfront incentive of up to $9,000 for qualifying solar-plus-battery systems, according to Duke Energy PowerPair program details.

The incentive breaks down as follows:

• Solar: $0.36 per watt-AC for systems up to 10 kW, for a maximum of $3,600.
• Battery storage: $400 per kWh for up to 13.5 kWh of storage, for a maximum of $5,400.

To qualify, homeowners must:

• Be Duke Energy Kentucky residential customers.
• Install a new solar and battery system together; existing solar systems are not eligible.
• Use a Duke Energy-approved Trade Ally installer.
• Install qualifying equipment from the approved vendor list.
• Submit the application within 90 days of the system’s operational date.

Enrollment is subject to program capacity and may use a random selection or first-come, first-served process depending on the current application window. Because Duke Energy Kentucky also credits exports at the lower Net Metering II rate, pairing solar with battery storage is a strong fit. The battery stores surplus solar for self-consumption instead of exporting it at a reduced credit.

Other State and Local Incentives

Beyond net metering and PowerPair, Kentucky homeowners, farmers, and businesses have a handful of targeted programs.

Solarize Louisville and Solarize Lexington

Solarize campaigns use group purchasing power to negotiate discounted installation pricing from a vetted installer.

• Solarize Louisville is open to homeowners, small businesses, nonprofits, and places of worship in Jefferson County and surrounding Kentucky counties, plus parts of southern Indiana. Participants typically receive discounts of 12% to 18%, according to the Louisville Metro Solarize Louisville announcement (2024). The program is administered through the Mayor’s Office of Sustainability.
• Solarize Lexington is being restructured to include all counties in the Lexington-Fayette County Metropolitan Statistical Area and is expected to relaunch in spring 2026, according to the City of Lexington Solarize Lexington page. The program offers discounted wholesale rates and connects participants to a vetted installer.

These programs do not require a state or federal tax credit, which makes them especially useful in 2026.

Kentucky Incentives for Energy Independence (KEDFA)

The Kentucky Incentives for Energy Independence program, administered by the Kentucky Economic Development Finance Authority (KEDFA), provides tax incentives for approved commercial and industrial facilities that generate electricity from renewable resources, including solar PV. This is a business-facing program and is not available to homeowners.

Approved renewable energy facilities that meet minimum output and capital investment requirements may receive:

• A credit of up to 100% of Kentucky income tax and limited liability entity tax attributable to the project.
• A sales and use tax incentive of up to 100% of Kentucky sales and use tax paid on eligible materials, machinery, and equipment.

For solar facilities, the minimum output is generally 50 kW and the minimum capital investment is $1,000,000, and electricity must be sold to an unrelated party, according to Dickinson Wright’s Kentucky renewable energy incentives summary. Businesses must apply and receive approval from KEDFA before beginning the project.

Kentucky Agricultural Development Fund On-Farm Energy Efficiency Incentives

The KADF On-Farm Energy Efficiency Incentives Program reimburses Kentucky farm owners up to 50% of the cost of eligible energy-saving equipment, including solar panels, with a maximum reimbursement of $10,000 per project, according to KCARD’s summary of Kentucky farm energy programs. Applicants typically need at least $25,000 in gross farm income and an approved third-party energy audit. This program can be stacked with USDA REAP funding.

USDA Rural Energy for America Program (REAP)

REAP provides grants and guaranteed loans to agricultural producers and rural small businesses for renewable energy systems and energy efficiency improvements. Grants can cover up to 50% of eligible project costs, with grant amounts ranging from $1,500 to $1,000,000 per project, according to USDA Rural Development. Loan guarantees are also available. Eligible applicants include agricultural producers with at least 50% of gross income from farming and rural small businesses in areas with a population of 50,000 or fewer.

C-PACE / EPAD Financing

Kentucky’s Energy Project Assessment District (EPAD) law allows local governments to create districts for Property Assessed Clean Energy (C-PACE) financing. Eligible commercial property owners can finance up to 100% of solar and other clean energy improvements with no upfront out-of-pocket cost and repay the financing through a voluntary assessment on the property tax bill, according to the City of Lexington EPAD financing page. Energize Kentucky administers programs in participating jurisdictions. Residential PACE is not broadly available in Kentucky.

What Kentucky Does Not Offer

Kentucky does not offer three incentives that are common in other states:

• No state solar tax credit. Homeowners cannot claim a Kentucky income tax credit for solar.
• No residential property tax exemption. The added value of a solar system may increase assessed value.
• No residential sales tax exemption. Residential solar equipment is subject to Kentucky’s 6% state sales tax plus applicable local tax.

Installers should include sales tax in quoted prices and set homeowner expectations on property tax.

Federal Solar Tax Credit: What Changed in 2026

The 30% federal Residential Clean Energy Credit under Internal Revenue Code Section 25D expired for homeowner-owned systems placed in service after December 31, 2025. Homeowners who buy solar with cash or a loan in 2026 cannot claim it.

This is the single largest change in Kentucky solar math. The state never had a large rebate stack, so the loss of the federal credit is significant.

Commercial, leased, and power-purchase-agreement systems may still access the Investment Tax Credit under Section 48E. The usual safe-harbor rules apply: construction must generally begin before July 4, 2026, or the system must be placed in service by December 31, 2027, according to IRS guidance on the One Big Beautiful Bill Act (2025). Lease and PPA providers can pass part of that credit through as lower monthly payments.

Systems placed in service in 2025 can still be claimed on the 2025 tax return using IRS Form 5695. Homeowners and businesses should verify current eligibility with a tax professional before signing a contract.

Financing Options for Kentucky Solar

Without the residential federal tax credit, financing choices have a larger impact on total cost and monthly cash flow than in high-incentive states.

Cash Purchase

Cash delivers the simplest math and the lowest total cost. The homeowner owns the system, keeps all bill savings, and avoids interest. The main benefit in 2026 is avoiding financing costs, not capturing a tax credit.

Solar Loan

Secured and unsecured solar loans let homeowners spread the cost over 10 to 25 years. The key comparison is the loan payment versus the monthly utility savings. A well-sized system in LG&E or KU territory can produce positive cash flow in year one if the loan term is long enough and the interest rate is reasonable. In Duke Energy or Kentucky Power territory, the loan may exceed savings until rates rise further.

Leases and Power Purchase Agreements

Under a lease or PPA, a third party owns the system and sells electricity to the homeowner at a fixed or escalating rate. The owner can claim the commercial Section 48E credit if eligible and pass part of the savings through. This can make sense for homeowners who do not have the tax appetite for a credit or who want $0 down. The tradeoff is lower lifetime savings and no ownership of the equipment.

C-PACE for Commercial Properties

Commercial property owners in participating Kentucky jurisdictions can use C-PACE financing to cover up to 100% of project cost with no upfront payment. The financing is repaid through a property tax assessment and can transfer to a new owner if the property is sold. Terms typically range from 15 to 25 years.

USDA REAP

REAP is the most important federal incentive for Kentucky farms and rural businesses. Grants can cover up to 50% of eligible project costs, and loan guarantees can cover larger portions. The program is competitive and requires a technical report or energy audit. Agricultural producers can apply regardless of location, while rural small businesses must be in an eligible area with a population under 50,000.

Cost, ROI, and Payback Scenarios for 2026

Kentucky solar economics depend on system cost, electricity rate, utility export credit, and financing. As of mid-2026, Palmetto estimates a typical 8.91 kW system in Kentucky costs about $26,559, or roughly $2.98 per watt, according to Palmetto (2026). Actual quotes vary by installer, equipment, roof complexity, and location.

Example 1: 8 kW Residential System, LG&E or KU, Cash Purchase, No Federal Credit

• Gross cost at $2.75/W: $22,000
• Kentucky sales tax at 6%: $1,320
• Total upfront cost: $23,320
• Annual production in central Kentucky: ~11,800 kWh
• Full retail net metering effectively offsets usage at 15.02 cents/kWh
• Annual savings: 11,800 kWh × $0.1502 = ~$1,772
• Simple payback: $23,320 ÷ $1,772 = ~13.2 years

This example shows why LG&E and KU territory is the most favorable residential solar market in Kentucky. The customer captures full retail value for nearly every kilowatt-hour produced.

Example 2: 8 kW Residential System, Duke Energy Kentucky, Cash Purchase, No Federal Credit

• Gross cost at $2.75/W: $22,000
• Kentucky sales tax at 6%: $1,320
• Total upfront cost: $23,320
• Annual production: ~11,800 kWh
• Assumed self-consumption: 75%
• Avoided retail cost: 11,800 kWh × 75% × $0.1502 = ~$1,329
• Exported energy value at assumed avoided cost of $0.075/kWh: 11,800 kWh × 25% × $0.075 = ~$221
• Total first-year savings: ~$1,550
• Simple payback: $23,320 ÷ $1,550 = ~15.0 years

This is a planning estimate. The actual avoided-cost rate should be confirmed from Duke Energy’s current tariff. The payback stretches because exported power is worth roughly half the retail rate.

Example 3: 8 kW Residential System with Battery and Duke PowerPair

• Solar gross cost at $2.75/W: $22,000
• Battery cost: $12,000
• Subtotal: $34,000
• Kentucky sales tax at 6%: $2,040
• Duke PowerPair incentive: -$9,000
• Total upfront cost: $27,040
• Self-consumption rises to 90%
• Annual savings: 11,800 kWh × 90% × $0.1502 = ~$1,595
• Exported value: 11,800 kWh × 10% × $0.075 = ~$89
• Backup power value: not quantified here
• Simple payback: $27,040 ÷ $1,684 = ~16.1 years

The battery does not pay for itself through bill savings alone in this example. The value comes from higher self-consumption, backup power during Kentucky storms, and participation in potential battery control programs. For many homeowners, that resilience is the deciding factor.

Example 4: 200 kW Commercial Warehouse with KEDFA, ITC, and MACRS

This is a hypothetical example for illustration.

• Gross cost at $2.25/W: $450,000
• KEDFA sales tax incentive (6% of equipment): ~$25,000 saved
• 30% federal Section 48E ITC: $135,000
• MACRS 5-year depreciation: roughly $85,000 to $100,000 in tax value
• Net effective cost after incentives: ~$190,000 to $205,000
• Annual production: ~262,000 kWh
• Self-consumption: 85%
• Retail/commercial rate: 13 cents/kWh
• Annual savings: 262,000 kWh × 85% × $0.13 = ~$28,951
• Simple payback: ~6.6 to 7.1 years before rate escalation; faster if rates rise

Real project economics depend on roof condition, demand charges, financing, KEDFA negotiation outcome, and utility rate structure. The commercial stack is far stronger than the residential stack in Kentucky in 2026.

Common Mistakes and Misconceptions

Kentucky’s incentive stack is thin enough that small errors can break a proposal.

Quoting the 30% Federal Tax Credit to New Residential Customers

The Residential Clean Energy Credit expired for homeowner-owned systems placed in service after December 31, 2025. If a homeowner is buying with cash or a loan in 2026, they cannot claim it. Some national marketing still mentions it. Do not rely on it in a Kentucky residential proposal unless the customer has a specific qualifying situation.

Assuming Net Metering Is the Same Everywhere

LG&E and KU offer full retail net metering. Duke Energy and Kentucky Power offer reduced export credits. TVA-served utilities may not offer net metering at all. A proposal built for Louisville will be wrong for Bowling Green or Paducah. Always confirm the serving utility and current tariff.

Oversizing for Export

In utility territories with reduced export credits, a system that produces 50% more than the home uses will export most of that excess at a low rate. The homeowner paid for that capacity at the full installed cost. The safer design rule is to size the system for roughly 90-100% of annual usage, with a battery if the customer is in Duke Energy or Kentucky Power territory.

Ignoring Sales Tax

Kentucky does not exempt residential solar equipment from the 6% state sales tax or applicable local sales tax. A $25,000 system can carry $1,500 or more in sales tax. Include it in the quoted price.

Forgetting the Grandfathering Question

Customers who installed solar with LG&E or KU before September 24, 2021, may be on the NMS-1 tariff. Duke Energy customers who installed before January 2025 are grandfathered into full retail net metering for 25 years. Ask the question and check the interconnection agreement before modeling.

Treating Solarize Deadlines as Flexible

Solarize programs have fixed enrollment windows and installation deadlines. Missing the deadline means missing the discount. Interested customers should sign up early and track contract and installation deadlines.

FAQ

What solar incentives are available in Kentucky in 2026?

Kentucky offers utility-specific net metering, the Duke Energy PowerPair solar-plus-battery rebate up to $9,000, Solarize Louisville and Solarize Lexington group-purchasing discounts, KADF on-farm energy reimbursements up to $10,000, USDA REAP grants and loans for farms and rural businesses, and KEDFA commercial tax credits and sales tax incentives. There is no state residential tax credit, property tax exemption, or sales tax exemption, and the federal residential tax credit expired after 2025.

Does Kentucky have net metering for solar in 2026?

Yes, most investor-owned utilities and electric cooperatives must offer net metering under state law (S.B. 100), with systems capped at 45 kW. LG&E and KU Energy offer full retail net metering. Duke Energy Kentucky moved new customers to Net Metering II in January 2025, crediting exports at an avoided-cost rate. Kentucky Power offers reduced credits around $0.09 per kWh. TVA-served utilities in western Kentucky are not required to offer net metering.

Is the federal solar tax credit still available in Kentucky in 2026?

The 30% federal Residential Clean Energy Credit under Section 25D expired for homeowner-owned systems placed in service after December 31, 2025. Commercial, leased, and power-purchase-agreement systems may still qualify for Section 48E, but construction must generally begin before July 4, 2026, or the system must be placed in service by December 31, 2027.

What is the Duke Energy PowerPair program in Kentucky?

PowerPair is a Duke Energy Kentucky pilot that gives residential customers a one-time incentive of up to $9,000 for installing a qualifying solar-plus-battery system. The solar portion pays $0.36 per watt-AC up to 10 kW, and the battery portion pays $400 per kWh up to 13.5 kWh. Participants must use a Duke-approved Trade Ally installer and meet equipment requirements.

Does Kentucky have a state solar tax credit?

No. Kentucky does not offer a state income tax credit for residential solar installations. The Kentucky Incentives for Energy Independence program provides tax credits and sales tax incentives, but only for approved commercial and industrial projects.

Will solar panels increase my property taxes in Kentucky?

Kentucky does not have a statewide property tax exemption for residential solar systems. The added value of a solar installation may be included in your property tax assessment. Homeowners should check with their county property valuation administrator.

What is the Kentucky Agricultural Development Fund On-Farm Energy Efficiency Incentives Program?

The KADF program reimburses Kentucky farm owners up to 50% of the cost of eligible energy-saving equipment, including solar panels, with a maximum reimbursement of $10,000 per project. Applicants generally need at least $25,000 in gross farm income and an approved third-party energy audit.

What is the typical solar payback period in Kentucky in 2026?

A cash-purchased residential solar system in Kentucky typically pays back in 12 to 17 years in 2026 without the federal residential tax credit. Payback is shorter for LG&E and KU customers with full retail net metering and longer for Duke Energy or Kentucky Power customers on reduced export credits. Commercial projects that qualify for KEDFA incentives, the federal ITC, and MACRS depreciation can pay back in 7 to 10 years.

Can Kentucky farmers get help paying for solar?

Yes. Kentucky farmers can combine the KADF On-Farm Energy Efficiency Incentives Program with USDA REAP grants or guaranteed loans. REAP grants can cover up to 50% of eligible project costs for agricultural producers and rural small businesses.

What is the most common mistake when sizing a solar system in Kentucky?

The most common mistake is oversizing for export. In utility territories with reduced export credits, excess solar sent to the grid earns far less than power used on-site. Size the system for roughly 90-100% of annual usage, and add a battery if the customer is in Duke Energy or Kentucky Power territory.

Conclusion

Kentucky solar in 2026 is a utility-specific proposition. The federal residential tax credit is gone. Net metering no longer means full retail credit for every customer. What remains is decent sun, rising rates, and a set of targeted programs that can make solar work for the right homeowner, farmer, or business.

Three actions will separate a good Kentucky proposal from a bad one:

1. Confirm the utility and tariff. LG&E, KU, Duke Energy, Kentucky Power, cooperatives, and TVA utilities all have different rules. Model the actual tariff, not a generic assumption.
2. Size for self-consumption, not export. In reduced-credit territories, exported power earns avoided-cost rates. Keep production on-site through right-sizing, load shifting, or battery storage.
3. Use accurate financial modeling. With no federal residential credit and thin state incentives, every cent of savings matters. SurgePV’s generation and financial tool and solar proposal software let you model each scenario and show customers real payback numbers. Check pricing or book a demo to see how it works.