National Solar Index Tool Hub

Solar Tools Dashboard

Launch the full suite of homeowner-focused solar calculators to estimate costs, savings, payback, and system fit in your market.

Solar System Designer

Estimate ideal system size, panel count, financing, and long-term payback.

Calculate your solar savings using bill assumptions and energy-offset models.

Break down peak/off-peak usage and estimate monthly and annual savings.

Model usable roof area, panel layout fit, and estimated production potential.

Compare utility vs solar economics and evaluate projected return on investment.

Analyze tariff structures to find where solar offset produces maximum value.