Solar in Williston, ND: 2026 Cost, Savings & Payback
Calculate 2026 solar panel cost, payback, and 25-year bill savings in Williston, North Dakota. Based on 4.1 peak sun hours/day, 10.3¢/kWh average electricity rate, Xcel Energy utility context, and current IRS guidance for the ended federal residential clean energy credit.
Solar in Williston, ND: quick answer
A typical 6kW solar system in Williston costs about $17,160 before local or state incentives. For 2026 installs, the federal residential clean energy credit is modeled as $0, so the estimated cost remains about $17,160 before any local incentive. It produces about 7,004 kWh per year from 4.1 peak sun hours/day, saves about $722 per year, and reaches payback in about 23.8 years.
2026 6kW Cost
$17,160
Monthly Savings
$60
Production / kW
1,167 kWh
Panel Count
~15
4.1
Peak Sun Hours/Day
10.3¢
Avg Rate (¢/kWh)
23.8 yr
Payback Period
$25k
25-Year Savings
Williston Solar Overview
Calculate Your Williston Solar Savings
Williston average: $93/mo
South-facing roofs produce the most energy
Add $8,000-$12,000 for whole-home battery backup
Annual Production
kWh/year
Annual Savings
per year
Net System Cost
after 2026 federal credit
Payback Period
break-even time
Bill Offset and Export Assumptions
Current Annual Bill
$1,116
Estimated Usage
10,824 kWh
Bill Offset
66%
Used On Site
100%
Exported production is discounted in this planning model instead of being treated as a guaranteed one-for-one bill credit. For Williston, verify the current Xcel Energy export-credit method and any fixed monthly charges before relying on the payback number.
25-Year Total Savings
$25,311
Monthly Savings
$62
2026 Federal Credit
$0
Cumulative Savings vs System Cost
Cost Breakdown
| Item | Williston | National Avg |
|---|---|---|
| Gross System Cost (6kW) | $17,160 | $17,100 |
| 2026 Federal Residential Credit | -$0 | $0 |
| Net System Cost | $17,160 | $17,100 |
| Cost Per Watt | $2.86/W | $2.85/W |
Solar Potential in Williston
Sun Hours vs National Average
Williston gets 9% less sun than the national average, but high-efficiency panels compensate.
Climate Advantages
- 193 sunny days per year
- Average temperature: 40°F — cooler temps actually improve panel efficiency
- Average roof size: 1,661 sq ft — enough for a 92-panel system
Williston Solar Incentives & Programs
Federal Investment Tax Credit (ITC)
For 2026 planning, JouleIO does not subtract a federal residential clean energy credit. The IRS says the Residential Clean Energy Credit was 30% for eligible property installed from 2022 through December 31, 2025, and is not available for property placed in service after December 31, 2025.
Source: IRS Residential Clean Energy Credit and IRS One Big Beautiful Bill provisions.
North Dakota State Incentives
Federal residential solar credit ended for 2026 homeowner-owned systems placed in service after Dec. 31, 2025; check local utility for additional rebates
Net Metering — Xcel Energy
Xcel Energy offers net metering in Williston. Earn credits for excess solar energy sent to the grid, reducing your electric bill further.
Environmental Impact in Williston
3.0
Tons CO2 Offset/Year
49
Equivalent Trees Planted
0.7
Homes Worth of Energy
Based on 7,183 kWh annual production with a 6kW system. EPA average: 0.417 metric tons CO2 per MWh, 10,632 kWh per US home.
Solar Energy in Williston, North Dakota
Williston, North Dakota receives an average of 4.1 peak sun hours per day, offering adequate solar resources for homeowners looking to reduce their electricity bills. With electricity rates averaging 10.3¢ per kWh from Xcel Energy, below the national average, but with rates rising 2-3% annually, the long-term savings are still meaningful.
A typical 6kW solar system in Williston produces approximately 7,183 kWh per year, saving homeowners an estimated $741 annually. The system pays for itself in about 23.2 years, after which you enjoy essentially free electricity for the remaining 2+ years of the system's warranty life.
Williston has a solar penetration rate of 7.1% — showing growing adoption of residential solar, with significant room for expansion. The cost of living index of 95.8 (national average: 100) is near the national average.
Other Cities in North Dakota
Methodology & Solar Data Sources for Williston
How we calculate Williston solar potential and savings: Solar production estimates use NREL's PVWatts calculator methodology, applied to Williston's specific solar irradiance (peak sun hours), tilt angle, and azimuth. Cost figures combine NREL's Annual Technology Baseline for system pricing, ENERGY STAR's database for residential PV averages, and EIA Form 861 utility rate data for North Dakota.
- Solar irradiance for Williston: based on NREL National Solar Radiation Database (NSRDB) — 30-year average peak sun hours per day.
- System sizing assumes residential rooftop installation with standard 350-400W panels, calibrated to typical Williston household electricity usage.
- Federal tax credit: modeled as 0% for 2026 residential installations because IRS guidance says the Residential Clean Energy Credit is not available for property placed in service after December 31, 2025.
- Net metering assumes 1:1 retail-rate compensation typical in North Dakota (verify with local utility — some have shifted to net billing or avoided-cost rates).
- System lifetime standard 25 years with annual degradation of 0.5%/year per industry warranty norms.
Authoritative US solar data sources:
- NREL PVWatts Calculator — official US solar production estimator
- NREL National Solar Radiation Database — 30-year solar irradiance data
- IRS Residential Clean Energy Credit — 2026 federal residential credit status
- IRS One Big Beautiful Bill provisions — clean energy credit expiration overview
- DSIRE — State Solar Incentives — searchable database for North Dakota
- EIA Electric Power Monthly — North Dakota utility rate data
- ENERGY STAR Solar — efficient solar product database
Solar Disclaimer: Solar savings vary based on roof orientation, shading, system quality, installer markup, financing terms, utility rate plan, and policy changes. Always get 3+ quotes from NABCEP-certified installers and review contracts carefully. Tax credit eligibility depends on tax liability — consult a tax professional.
Reviewed by Brazora Monk · Last updated 2026 · NREL irradiance data per NSRDB latest release
Frequently Asked Questions
How much do solar panels cost in Williston, ND?
The average cost of a 6kW solar panel system in Williston is approximately $17,160 before local or state incentives ($2.86/watt). For 2026 planning, this calculator does not subtract a federal residential clean energy credit because IRS guidance says the credit is not available for property placed in service after December 31, 2025. Federal residential solar credit ended for 2026 homeowner-owned systems placed in service after Dec. 31, 2025; check local utility for additional rebates
How many solar panels do I need in Williston, ND?
A typical 6kW residential solar system in Williston needs about 15 panels if each panel is rated near 400 watts. That system produces about 7,004 kWh per year in this estimate, or roughly 1,167 kWh per installed kW before shading, roof orientation, and inverter losses are customized.
How many peak sun hours does Williston get?
Williston, ND receives an average of 4.1 peak sun hours per day and approximately 193 sunny days per year. This is near the national average, providing good conditions for residential solar panels.
What is the solar payback period in Williston?
The average solar payback period in Williston is approximately 23.8 years for a 6kW cash-price estimate before local or state incentives. After payback, your solar panels generate essentially free electricity for the remaining warranty life. Over 25 years, bill savings can reach about $24,662 before subtracting installation cost.
Does Williston have net metering?
Yes, Williston has access to net metering through Xcel Energy. This allows you to earn credits for excess solar energy sent to the grid, but the final savings depend on the current utility tariff and fixed monthly charges.
Is solar worth it in Williston, ND in 2026?
Solar may still be worthwhile in Williston, especially for homeowners with high usage or strong local incentives, but the 23.8-year payback means quote comparison matters. For 2026 installs, JouleIO does not assume a federal residential credit; local incentives and net metering are the main financial drivers.