
Energy Upgrade Payback Ritual
Payback in years — net cost after grants divided by what it saves in year one at your energy prices — solar, battery, heat pump, EV, insulation, glazing, LED, the same way.
In your download: 8 files
- Excel workbook · Light · USD
- START HERE guide (PDF)
- Excel workbook · Dark Mode
- Excel workbook · UK · GBP
- Excel workbook · EUR
- Excel workbook · AUD
- Excel workbook · CAD
- Excel workbook · INR
What the file tells you
Every installer's quote comes with its own savings estimate and its own maths. This sheet runs all of them the same way at your energy prices — payback, lifetime return, what it does to cash flow if financed — and tells you which upgrade to do first and which to skip.
Homeowners with three quotes on the table and a feeling that the salespeople's numbers do not add up.

What buyers say
verified purchases only, uneditedExcel 2016+ or Microsoft 365. Or upload the .xlsx to Google Drive — it opens in Sheets with formulas and charts intact.
Yes — BLIK, Przelewy24, any card, Apple Pay and Google Pay. Prices in PLN, EUR or USD; the currency switch is at the top.
Tick “I’m purchasing as a business” at checkout and enter your NIP / VAT ID. The invoice arrives with the download e-mail.
14-day refund, no questions. One e-mail to [email protected].