2026 · No Federal Tax Credit · NREL + EIA Data
Solar Panels in Wisconsin: Cost, Payback & ROI (2026)
Is solar still worth it in Wisconsin after the 30% federal tax credit expired? These pre-computed estimates use NREL PVWatts production data and current 15.2¢/kWh Wisconsin electricity rates for a typical home using 900 kWh/month.
Section 25D (30% federal solar tax credit) expired December 31, 2025
All numbers below reflect 2026 math with no federal residential credit. State incentives, where applicable, are noted in the section below.
Wisconsin Solar at a Glance
Based on a 900 kWh/month home ($137/mo electric bill at 15.2¢/kWh), 100% offset, no state rebate applied.
9.0 kW
For 900 kWh/month home
$26,550
At $2.95/W (LBNL 2024 avg)
14.2 years
Without state rebate
$1,642
Estimated annual savings
$52,497
Cumulative before rebate
$25,947
Savings minus system cost
15.2¢/kWh
near average vs. 16.0¢ U.S. avg · EIA 2025
1,200 kWh/kW/yr
limited · 3.7 peak sun hrs/day · NREL PVWatts
Is Solar Worth It in Wisconsin in 2026?
Wisconsin's 15.2¢/kWh electricity rate is moderately above the national average, which makes solar financially reasonable in the southern portion of the state where sun hours are higher. Focus on Energy — the state's utility-funded program — provides rebates and financing for residential solar installations through participating utilities.
For a typical Wisconsin home consuming 900 kWh per month, our calculation shows a 9.0 kW system needed for 100% offset. At the current national average installed cost of $2.95/W (LBNL Tracking the Sun 2024), that's $26,550 gross before any state rebates. Year-one savings of $1,642 grow each year as electricity rates escalate — the model assumes 2.5%/year (EIA AEO 2024).
The 14.2 years payback period is moderate — within the national average range of 8–12 years. Over 25 years — the standard warranty period for most premium panels — a Wisconsin homeowner following this profile would save an estimated $52,497 total, for a net benefit of $25,947 after recovering the system cost.
Year-by-Year Savings Snapshot: First 10 Years
Based on 9.0 kW system, 0.5%/yr degradation, 2.5%/yr rate escalation, no state rebate.
| Year | Production (kWh) | Annual Savings | Cumulative |
|---|---|---|---|
| Year 1 | 10,800 | $1,642 | $1,642 |
| Year 2 | 10,746 | $1,674 | $3,316 |
| Year 3 | 10,692 | $1,708 | $5,023 |
| Year 4 | 10,639 | $1,741 | $6,765 |
| Year 5 | 10,586 | $1,776 | $8,541 |
| Year 6 | 10,533 | $1,811 | $10,352 |
| Year 7 | 10,480 | $1,847 | $12,200 |
| Year 8 | 10,428 | $1,884 | $14,084 |
| Year 9 | 10,375 | $1,922 | $16,005 |
| Year 10 | 10,324 | $1,960 | $17,965 |
System cost to recover: $26,550. Table shows savings without state rebate applied. Use the interactive calculator to enter your actual bill and any rebate.
Solar Incentives in Wisconsin (2026)
Focus on Energy rebates vary by year and utility. The program typically offers $500–$2,000 for qualifying residential solar installations.
- Focus on Energy solar rebates
- Retail-rate net metering (PSC rules)
- Property tax exemption on solar added value
- Sales tax exemption on solar equipment
Incentive programs change frequently. Verify current offerings at dsireusa.org or directly with your utility before making any purchasing decision.
How We Calculate Wisconsin Solar ROI
These estimates use the same methodology as our interactive solar ROI calculator, applied to Wisconsin-specific data:
System cost
$2.95/W installed
LBNL Tracking the Sun 2024
Solar production
1,200 kWh/kW/yr
NREL PVWatts v8
Electricity rate
15.2¢/kWh
EIA Residential Rates 2025
Rate escalation
2.5%/year
EIA Annual Energy Outlook 2024
Panel degradation
0.5%/year
NREL (Jordan & Kurtz, median)
System lifetime
25 years
Standard warranty period
No Section 25D (federal residential solar credit) is included — it expired December 31, 2025. State incentives are not reflected in these pre-computed figures; use the interactive calculator to enter specific rebate amounts.
Calculate With Your Actual Numbers
The figures above use statewide averages. Enter your actual monthly bill, any Wisconsin rebate amounts, and your offset target in our interactive calculator for a personalized estimate.
Frequently Asked Questions — Solar in Wisconsin
Compare Other States
Estimates are based on NREL PVWatts v8 production data, EIA 2025 electricity rates, and LBNL 2024 installed cost benchmarks. Actual savings vary by roof pitch, shading, utility rate structure, and local permit costs. This is not financial advice. Consult a licensed solar installer before making any purchasing decision.