Solar Savings Calculator
Estimate solar panel savings, ROI, payback period, and environmental impact
Electric Bill & Location
Average US household: $115-150/month
Check your utility bill (US avg: $0.14/kWh)
Historical avg: 2-4% per year
System Details
Avg: $2.50-$3.50 per watt installed
Avg home: 5-8 kW system
Typical: 0.3-0.8% per year
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Solar Energy Guide
How Solar Works
Solar panels convert sunlight into electricity. Excess power can be sent to the grid for credit (net metering). Most systems include a battery backup option for energy independence.
Federal Tax Credit (ended)
The 30% federal residential solar credit (Section 25D) was terminated by the One Big Beautiful Bill Act for expenditures made after December 31, 2025, and the planned 26% and 22% step-downs were repealed with it. The IRS treats the expenditure as made when installation is completed, so a system finished in 2026 or later receives no federal credit. State, local and utility incentives may still apply — enter them as a lower system cost. If your installation was completed by the end of 2025, select the 30% option above.
System Lifespan
Solar panels typically last 25-30 years with minimal maintenance. Most manufacturers offer 25-year warranties. Panel efficiency decreases slowly over time (0.3-0.8% annually).
Getting Started
Get 3-5 quotes from certified installers, check for local incentives, ensure your roof is suitable, and consider financing options like loans or leases. Solar increases home value by an average of $15,000.
How to Use This Calculator
- Enter your average monthly electric bill
- Input your electric rate ($/kWh) from your utility bill
- Select your region's sunlight conditions
- Enter estimated system cost (get quotes from installers)
- Adjust system size and federal tax credit percentage
- Click Calculate to see payback period and long-term savings
- Review environmental impact and year-by-year projections
Frequently Asked Questions
How much can solar panels save per year?
The average US homeowner saves $1,000-$2,500 per year with solar panels, depending on location, system size, electricity rates, and sun exposure. Homes in sunnier states with higher electricity rates see the greatest savings.
What is the typical payback period for solar panels?
Payback now depends heavily on when the system was installed. For installations completed by December 31, 2025, which qualified for the 30% federal credit, 6-10 years was typical. The federal residential credit was terminated for expenditures after that date, so a system installed in 2026 or later carries its full cost and payback commonly stretches to 10-15 years unless state, local or utility incentives fill the gap. After payback, the electricity generated is essentially free for the remaining years of panel life.
How does the federal solar tax credit work?
It no longer applies to new installations. The Section 25D residential clean energy credit, worth 30% of installation cost with no cap, was terminated by the One Big Beautiful Bill Act (Public Law 119-21) for expenditures made after December 31, 2025, and the scheduled 26% and 22% step-downs were repealed at the same time. The IRS treats the expenditure as made when installation is completed, not when you sign or pay, so a system finished in 2026 gets nothing. Unused credit from a qualifying 2025 or earlier installation still carries forward. State, local and utility incentives are unaffected.
What factors affect solar panel ROI?
Key factors include: your location's average sun hours, local electricity rates, system size and cost, available tax credits and incentives, roof orientation and shading, and whether your utility offers net metering (credits for excess power sent to the grid).
How long do solar panels last?
Modern solar panels typically last 25-30 years and come with manufacturer warranties of 25 years. Panel efficiency degrades slowly, typically losing about 0.5% per year, meaning after 25 years they still produce around 87% of their original output.