SP Solar Payback OutlineEnergy and utility

Methodology

The calculator uses transparent assumptions and ranges so users can adjust inputs before making decisions.

Future versions should add original examples, regional notes, and source citations where external data is used.

Operating notes

  • Do not provide financial, tax, or energy-system advice.
  • Avoid guaranteed savings, payback, or incentive claims.
  • Require reviewed sources before adding regional incentive details.