The federal solar Investment Tax Credit (ITC) gives you a dollar-for-dollar reduction on your federal income taxes equal to 30 percent of your total solar installation cost. A $20,000 solar system earns a $6,000 tax credit, reducing your federal tax bill by $6,000. This is not a deduction — it is a direct credit, meaning it reduces what you owe dollar for dollar. The 30 percent rate is locked through 2032 under the Inflation Reduction Act.
What Qualifies for the Solar Tax Credit
The ITC covers the total installed cost of a solar energy system, including solar panels, inverter, racking and mounting, wiring, labor, permitting, and design fees. Battery storage also qualifies when installed with solar — a $10,000 battery earns a $3,000 credit on top of the panel credit. Even the cost of a main panel upgrade (if required for solar interconnection) qualifies. The system must be installed on a property you own (primary residence, second home, or rental property) — leased systems do not qualify because you do not own the equipment.
How to Claim the Credit
You claim the ITC when you file your federal income taxes for the year the system was installed and placed in service. File IRS Form 5695 (Residential Energy Credits) with your tax return. The credit amount goes on line 5 of Form 5695, then transfers to Schedule 3 of Form 1040, reducing your total tax liability. If the credit exceeds your tax liability for the year, the remaining balance rolls forward to the following tax year — you do not lose it.
ITC Phase-Down Schedule
| Year Installed | Credit Percentage |
|---|---|
| 2022 – 2032 | 30% |
| 2033 | 26% |
| 2034 | 22% |
| 2035 onward | 0% (residential) |
Installing before 2033 guarantees the full 30 percent credit. After 2032, the percentage decreases each year and reaches zero for residential installations in 2035. Commercial systems retain a permanent 10 percent credit beyond 2035. This phase-down makes 2026 through 2032 the optimal window for residential solar installation from a tax credit perspective.
See how the tax credit affects your total cost in our Solar Installation Cost Calculator — enter your system size and the credit is applied automatically.
State and Local Incentives
Beyond the federal 30% ITC, many states offer additional rebates, tax credits, and incentives that reduce solar costs further. New York offers up to $5,000 in state tax credits. Massachusetts offers SMART program payments based on production. Some utilities offer rebates of $500 to $2,500 for solar installation. Check the Database of State Incentives for Renewables and Efficiency (DSIRE) for your state’s specific programs. Our Installation Cost Calculator lets you enter state and local incentives to see your true net cost after all credits and rebates are applied.
Getting Multiple Quotes
Always get at least 3 quotes from different installers. Solar installation prices vary by 20 to 40 percent between companies for the same system — the variation is almost entirely in soft costs (sales commission, overhead, profit margin), not equipment. Compare quotes on a cost-per-watt basis (total price divided by system size in watts) with matching equipment specifications. A lower cost-per-watt quote using the same panels and inverter is simply a better deal. Our guide on solar installation costs in 2026 shows average prices by state so you can identify fair pricing.
State and Local Incentives
Beyond the federal ITC, many states offer additional rebates and tax credits. New York offers up to $5,000 in state credits. Massachusetts has SMART program payments. Some utilities offer $500-2,500 rebates. Check DSIRE (dsireusa.org) for your state. Our Installation Cost Calculator applies all incentives automatically.
Getting Multiple Quotes
Always get 3+ installer quotes. Prices vary 20-40% between companies for the same system. Compare on cost-per-watt (total price ÷ system watts) with matching equipment specs. Our installation cost guide shows fair pricing by state.
Energy Cost Impact
Monthly cost formula: (Watts × hours per day × 30) ÷ 1,000 × electricity rate. At the US average of $0.16/kWh, a 1,500W appliance running 2 hours daily costs $14.40/month. A 100W device running 8 hours costs $3.84/month. Even small wattage reductions compound over a year — saving 50W over 8 daily hours saves $23 annually. Calculate all your appliances combined in our Electricity Bill Calculator.
Measuring Your Actual Consumption
Published wattage ranges are approximations. Your specific model may draw more or less depending on age, settings, and condition. For exact numbers, use a plug-in watt meter (Kill A Watt P4400 or Poniie PN2000, both under $25) between the appliance and the wall for 24 hours. The meter captures running watts, peak surge, and total kWh consumed — the precise values for sizing solar panels, batteries, or generators. Look up typical values first in our Appliance Wattage Database with 140+ devices.
Sizing Solar Panels and Battery Backup
Use the average wattage for energy calculations (how many panels you need) and the startup surge for inverter and generator sizing (how big the inverter must be to handle the peak). Our Solar System Calculator handles both — enter all your appliances and get the complete system specification. For battery backup runtime, use our Battery Backup Calculator. For generator sizing, use our Generator Sizing Calculator which accounts for motor startup surge automatically.
Reducing Energy Consumption
The cheapest watt is the one you never use. Before sizing a solar system or generator, consider whether you can reduce consumption first. Upgrading to Energy Star rated appliances typically reduces consumption by 20 to 50 percent. Using timers and smart plugs eliminates standby power draw (which accounts for 5 to 10 percent of total home electricity use). Switching from incandescent or halogen to LED lighting reduces lighting consumption by 75 percent. Every watt you eliminate from your load reduces the solar panel count, battery size, and inverter capacity — saving thousands of dollars on the system.
