Return on Investment (ROI)

Return on Investment (ROI) for solar measures the total financial gain from your solar system compared to the initial cost, expressed as a percentage. A positive ROI means your solar system saves you more money than it costs over its lifetime.

Solar ROI is calculated by taking the total lifetime savings (electricity bill savings + incentives + increased home value) minus the total system cost (purchase price + maintenance - tax credits), divided by the net system cost. The average residential solar system in the US delivers a lifetime ROI of 100–300%, depending on location, electricity rates, and incentives. In high-rate states, ROI can exceed 300% — meaning the system saves three times more than it costs. Factors that improve ROI include: high local electricity rates, strong net metering policies, available state/local incentives, paying cash (no interest charges), and rising utility rates over time. Factors that reduce ROI include: low electricity rates, unfavorable net metering changes, high financing interest rates, and significant shading. Solar ROI typically outperforms many traditional investments when factored over the 25–30 year lifespan of the system, especially since the “returns” (electricity savings) are tax-free.