Independent, engineer-reviewed payback analysis of solar, heat pumps, insulation, windows and roofing — modelled from real energy use, real installed costs and current incentives.
Home energy upgrades are sold on brochures and monthly payments, and almost never on return. Two houses on the same street can get the same quote for the same equipment and see paybacks a decade apart — because payback depends on the house, not the product.
WattROI models these decisions as investments. We start from metered energy use, use installed costs collected from real quotes, apply incentives as they actually work, and publish every assumption so you can substitute your own numbers.
We are not installers and sell nothing. That is why we can tell you plainly that replacing good windows almost never pays back, and that the cheapest upgrade in the house is usually air sealing.
Sequencing, audits and the envelope-first principle.
Solar economics, batteries and what they really return.
Heat pumps for space and water, sized honestly.
Windows, roofing and the upgrades that do not pay back.
Model any upgrade against your own energy use and quotes.
WattROI publishes general energy and financial education, not engineering, tax or investment advice. Payback depends on your climate, energy prices, house condition and installed cost. Get a professional assessment and confirm incentive eligibility before committing money.