CostPrism
Home Improvement Updated June 2026

Solar Panel Installation Cost Calculator

Calculate your total solar panel system cost — before and after the 30% federal tax credit — based on your home's energy usage and state.

National avg: $28,000
Range: $17,000 – $45,000 (before tax credit)
Used by 31,240 people

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Your average monthly electricity bill

What Affects the Cost?

1. Federal 30% Tax Credit

The Investment Tax Credit (ITC) gives you a 30% credit on your total solar system cost, including installation. A $28,000 system gets a $8,400 tax credit, dropping your net cost to $19,600. This is a dollar-for-dollar reduction of your federal tax liability, not a deduction.

2. System Size (kW)

Average US home uses about 10,500 kWh/year and needs a 6–8 kW system. At $2.75–$3.50/watt, a 7 kW system costs $19,250–$24,500 before incentives. Add battery backup (Powerwall-style) for $10,000–$15,000 more.

3. Panel Type

Standard monocrystalline panels (most common) cost $0.70–$1.00/watt. Premium panels (SunPower, REC) cost $1.00–$1.40/watt but are 5–8% more efficient. Thin-film panels cost less but need more roof space.

4. State Incentives

On top of the federal 30% credit: Massachusetts offers a 15% state credit. New York offers $5,000 off. California has net metering but no state credit. Many utilities offer $300–$1,000 rebates. Use EnergySage's database to find your state's full incentive stack.

Solar Installation Cost Breakdown: Equipment vs. Labor

Based on national average project cost. Your breakdown may vary by material choice and contractor.

Cost Category % of Total Note
Solar Panels (hardware)
40%
PV modules — number depends on system size
Inverter & Electrical
20%
String or microinverters, wiring, panel upgrade
Installation Labor
25%
Mounting, wiring, connection — typically 2–4 workers, 1–3 days
Permits & Interconnection
8%
Building permit, utility interconnection fees
Design, Overhead & Profit
7%
Installer overhead, warranty, project management

2026 Cost Reference Table

Type / Option Typical Cost Range
5 kW system (small home) $13,750 – $17,500 | After ITC: $9,625–$12,250
7 kW system (average home) $19,250 – $24,500 | After ITC: $13,475–$17,150
10 kW system (large home) $27,500 – $35,000 | After ITC: $19,250–$24,500
12 kW system (very large) $33,000 – $42,000 | After ITC: $23,100–$29,400
Battery backup (add-on) $10,000 – $15,000

Frequently Asked Questions

The average 7 kW solar system costs $28,000 before the 30% federal tax credit. After the credit, the net cost is about $19,600. State incentives can reduce costs further. Payback period is typically 6–10 years depending on your electricity rates and state.

Solar is financially positive in most US states. Average payback is 7–9 years, with a 25-year system lifespan. Net metering policies (getting credit for excess power sent to the grid) are critical — confirm your utility has full-retail net metering before installing.

Battery backup ($10,000–$15,000) makes sense if you: live in an area with frequent outages, have time-of-use electricity pricing, or your utility doesn't offer net metering. Otherwise, standard grid-tied solar without batteries has the best financial return.

Cost Trends — 2022 to 2026

How costs have changed year over year. Useful for budgeting and understanding market direction.

Year Average Cost Change vs Prior Year
2022 $32,500 Baseline
2023 $30,800 ↓ 5.2%
2024 $29,400 ↓ 4.5%
2025 $28,600 ↓ 2.7%
2026 $28,000 ↓ 2.1%

National average estimates based on industry surveys and contractor pricing data. Regional costs may vary significantly.

Data Sources

  • • Lawrence Berkeley National Laboratory (LBNL) — Tracking the Sun — Annual solar installation cost benchmarks by state and system size
  • • US Department of Energy (DOE) — Solar investment tax credit (ITC) and incentive data
  • • National Renewable Energy Laboratory (NREL) — Solar resource data, system performance benchmarks
  • • EnergySage Market Data — Quote comparison data from solar installers nationwide

Get 3 Free Solar Quotes

Compare multiple solar installers and save an average of $5,000 on your system.

Get Free Solar Quotes on EnergySage Get Quote from Sunrun

Tips Before You Start

  • ✓ The 30% federal Investment Tax Credit (ITC) applies through 2032
  • ✓ Check your state for additional incentives — some states offer $1,000–$5,000 rebates
  • ✓ Net metering policies vary by state and utility — confirm before buying
  • ✓ Get 3+ quotes — solar installer pricing varies by 20–40%
  • ✓ Don't buy more than you need — size to 90–110% of your annual usage

Cost by State — 2026

Based on national average pricing adjusted for local labor and material costs.