Observed arrival · 2026-11-07
Sun Calculator turns Spanish solar estimates into local math
A Spanish-language calculator estimates solar production, savings, and payback using a municipality, household consumption, panel setup, and local taxes.
- For
- Spanish households weighing rooftop or balcony solar
- Worth noticing
- For unverified ordinances, the calculator says it leaves the tax unapplied rather than treating missing data as zero.
Field notes
Inputs include municipality, annual kWh use, daytime household presence, system size, battery, and panel orientation; outputs include generation, self-consumption, surplus, estimated savings, and payback. The page shows separate Madrid examples for a 35° roof and a 90° balcony, and says municipal IBI/ICIO figures are linked to ordinance sources. It also says missing tax data is not counted as zero; the stated coverage totals differ across sections.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue