EconomicsUp to date · Jan 15, 2026

ROI (Return on Investment)

The financial gain from solar expressed as a percentage of the initial cost. Most residential solar has 10-20% ROI.

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Payback Period

The time it takes for your cumulative savings to equal your initial investment in solar. Typically 6-10 years in the US.

Levelized Cost of Energy (LCOE)

The total cost of generating electricity from a system divided by its lifetime energy production. Used to compare energy sources.