Solar Panel Calculator

Estimate your potential savings, return on investment (ROI), and the ideal system size for your home. See the financial and environmental benefits of going solar.

Electricity Consumption

$10 $1,000
100 kWh 5,000 kWh
Optional: Enter your monthly kWh usage if known
$0.05 $0.50

Location & System Details

100 sq ft 5,000 sq ft
Estimated usable roof space for solar panels
$2.00 $6.00
Average cost per watt installed (including equipment and labor)

Financial Details

0% 50%
Current federal solar tax credit percentage
$0 $20,000
Additional state or local rebates/incentives
Annual Savings
$1,800
Estimated yearly savings
System Size
10.0 kW
Total Cost
$35,000
Net Cost (After Incentives)
$22,500
Payback Period
12.5 years
25-Year Savings
$52,000
ROI
231%

Savings Over Time

Environmental Impact

CO2 Offset (25 years)
120 tons
Trees Equivalent
1,920 trees
Cars Off Road
26 cars

How to Use the Solar Panel Calculator

Electricity Usage

Enter your average monthly electricity bill, usage in kWh, and your current electricity rate to establish your baseline energy costs.

Location & System

Specify your location, available roof area, and system cost per watt to calculate the optimal solar system size for your home.

Financial Details

Input federal tax credits, state incentives, and financing options to determine your net investment and potential savings.

Review Results

Analyze your annual savings, payback period, ROI, and environmental impact to make an informed decision about going solar.