Solar System Cost Calculator
Calculate the gross quote price and net out-of-pocket investment for home solar systems, including the 30% federal clean energy tax credit (ITC) and local rebates.
System Sizing & Incentives
Net Solar Investment Formula
Net Solar Cost = Gross Installation Cost - Federal Tax Credit (30%) - State/Utility Rebates- Gross System Cost: System size in Watts × price per Watt installed (typical US market average is $2.70 to $3.10/Watt).
- Federal Clean Energy Tax Credit (Section 25D): Dollar-for-dollar reduction in federal income tax liability equal to 30% of total system cost through 2032.
- State & Utility Rebates: Local cash incentives and solar renewable energy certificates (SRECs).
Step-by-Step Worked Example
Calculation Steps:
How to Use This Calculator
Assumptions & Limitations
- Tax credit eligibility assumes the taxpayer has sufficient federal income tax liability to monetize the credit.
- Equipment meets standard Tier 1 monocrystalline manufacturer specifications.
Frequently Asked Questions
How does the 30% federal solar tax credit (ITC) work?
The Residential Clean Energy Credit (IRC Section 25D) allows homeowners to deduct 30% of total solar installation expenses directly from federal income taxes owed when filing their annual tax return.
Related Cost Calculators
Solar Panel Savings Calculator
Calculate your monthly and 25-year cumulative electric bill savings from residential solar panels, factoring in utility rate inflation and optional loan financing.
Solar Energy Production Calculator
Calculate daily, monthly, and annual kilowatt-hour (kWh) solar electricity generation using system capacity, regional peak sun hours, and performance derate ratios.
Home Battery Storage Cost Calculator
Calculate equipment, installation, and net costs for home energy storage systems (Tesla Powerwall, Enphase, FranklinWH), with 30% federal tax credit deductions.