Solar Panel Cost Calculator 2026
Estimate your solar system cost, federal tax credit savings, annual electricity savings, and payback period based on your state and system preferences.
Your Solar System Details
3 kW 9 kW 15 kW
Your Solar Cost Estimate
Gross System Cost
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Federal Residential ITC (Repealed)
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Section 25D repealed Q1 2026
Net Cost After ITC
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Annual Production
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kWh/year
Annual Savings
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Monthly Savings
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avg per month
Payback Period
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years
25-Year Financial Summary
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Total Savings
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Net Profit
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ROI
Note: These are estimates based on average installed costs and state electricity rates. Actual costs vary by installer, roof complexity, and local market conditions. Annual production assumes 80% system efficiency factor. Get 3–5 local quotes for accurate pricing.
Solar Panel Cost Per Watt by Tier (2026)
Installed cost per watt includes panels, inverter, racking, wiring, permitting, and labor.
| Tier | Cost/Watt | 8 kW System | Net Cost (no ITC) | Example Brands |
|---|---|---|---|---|
| Budget | $2.20–$2.60 | $17,600–$20,800 | $12,320–$14,560 | LONGi, Trina Solar, JA Solar |
| Mid-range | $2.60–$3.20 | $20,800–$25,600 | $14,560–$17,920 | REC, Q Cells, Canadian Solar |
| Premium | $3.20–$4.00 | $25,600–$32,000 | $17,920–$22,400 | Maxeon, SunPower, Panasonic |
How This Calculator Works
1
Select Your Details
Choose your state for local electricity rates and sun hours, pick a panel tier, and set your desired system size.
2
Get Cost Estimates
We calculate gross cost as your net out-of-pocket. The federal residential ITC (Section 25D) was repealed in Q1 2026; check state-level incentives separately.
3
See Your ROI
View estimated annual savings, payback period, and 25-year financial projection using your state's electricity rate and sun exposure.
Frequently Asked Questions
How much does a solar panel system cost in 2026?
The average residential solar system costs $2.50–$3.50 per watt installed in 2026, depending on panel quality, inverter type, and location. A typical 8 kW system costs $20,000–$28,000. The federal residential ITC (Section 25D) was repealed Q1 2026, so the gross figure is now the homeowner net cost (pre any state incentives). Premium panels (Maxeon, SunPower) cost $3.20–$4.00/W, mid-range (REC, Q Cells) cost $2.60–$3.20/W, and budget options (LONGi, Trina) cost $2.20–$2.60/W.
Is there still a federal solar tax credit (ITC) in 2026?
No — the federal residential solar tax credit (Section 25D ITC) was repealed in early 2026. Homeowners installing solar can no longer claim the 30% federal credit that existed under the Inflation Reduction Act through 2025. Commercial solar projects continue to receive the 30% ITC under Section 48/48E through 2032. For residential, check the DSIRE database (dsireusa.org) for state-level credits and rebates that may still apply.
How long does it take for solar panels to pay for themselves?
The solar payback period typically ranges from 6 to 12 years depending on electricity rates, sun exposure, and system cost. States with high electricity rates (California, Massachusetts, New York, Connecticut) see payback in 5–7 years. States with lower rates (Louisiana, Idaho, Wyoming) may take 10–15 years. After payback, your solar system generates essentially free electricity for the remaining 15–20 years of its warranty.
Does this calculator include battery storage costs?
No. This calculator estimates the cost of a solar panel system only (panels, inverter, racking, and installation). Adding battery storage (like the Tesla Powerwall 3 at ~$9,200 or Enphase IQ Battery 5P at ~$6,000) increases the total cost but previously qualified for the 30% federal ITC (Section 25D, repealed Q1 2026). Battery storage is recommended for backup power and time-of-use optimization, not necessarily for financial payback.
How accurate is this cost estimate?
This calculator provides ballpark estimates based on national average cost-per-watt data and state-level electricity rates. Actual costs vary based on roof complexity, local permitting fees, installer competition, and any additional upgrades (panel upgrades, main panel upgrade, trenching). We recommend getting 3–5 quotes from local installers for accurate pricing. Note: the federal residential ITC (Section 25D) was repealed in early 2026, so estimates above show full system cost without federal credit.
What affects the cost per watt of a solar installation?
Key cost factors include: (1) Panel tier — premium panels with higher efficiency cost more per watt but need fewer panels. (2) Inverter type — microinverters cost 10–20% more than string inverters. (3) Roof complexity — multi-plane roofs, steep pitches, and tile roofs increase labor costs. (4) Local market — installer competition varies by region. (5) Permitting — some jurisdictions have higher permit fees. (6) Electrical upgrades — older homes may need a main panel upgrade ($1,500–$4,000).
Are there additional state incentives beyond the federal tax credit?
Yes. Many states offer additional incentives: state tax credits (e.g., South Carolina 25%, Arizona up to $1,000), SRECs — Solar Renewable Energy Certificates (New Jersey, Massachusetts, Maryland), net metering credits for excess energy, property tax exemptions for solar equipment, and utility rebates. These can significantly reduce your net cost. Note: the federal residential ITC (Section 25D) was repealed in early 2026; DSIRE lists currently active state programs. Check the DSIRE database (dsireusa.org) for incentives in your state.