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Both calculators run independently — change the inputs on either side to compare results.

Solar Lease vs Buy Calculator

Compare the true 20-year cost of leasing solar panels versus buying them outright with tax credits. Use this calculator before signing a lease agreement to see which option saves more money.

Solar System Purchase Price ($)

Monthly Lease Payment ($)

Lease Down Payment ($)

Tax Credit (Purchase Only) (%)

Lease Annual Escalator (%)

Analysis Period (years)

Fill in the required fields to see your result.

Solar Energy

Solar Shading Loss Calculator

Quantify how much annual solar energy you lose to roof shading. Enter shading hours, affected panel percentage, and optimizer type to see real kWh losses before you install.

Unshaded System Production (kWh/year)

Daily Shading Hours (hours)

Peak Sun Hours (hours)

Percentage of Panels Shaded (%)

Power Optimizer Type

Fill in the required fields to see your result.

Key differences

	Solar Lease vs Buy Calculator	Solar Shading Loss Calculator
Category	Solar Energy	Solar Energy
Inputs required	6	5
Result	Buying Advantage ($)	Annual Energy Loss (kWh)
What it does	Compare the true 20-year cost of leasing solar panels versus buying them outright with tax credits. Use this calculator before signing a lease agreement to see which option saves more money.	Quantify how much annual solar energy you lose to roof shading. Enter shading hours, affected panel percentage, and optimizer type to see real kWh losses before you install.