A solar system is a 25-year bet on the sky above it. This series takes the environmental variables between the sun and the socket, one at a time, and reads each against twenty years of NASA and NOAA record: what it does to production, how it has moved, and what a buyer should do about it. No forecasts without data, and every figure named to its source.
A fast reading of expected production, downside planning, and the rain gap that shapes natural cleaning. Start here, then open the underlying report only when the decision needs more detail.
Choose one market. The surface holds everything else still so the numbers remain comparable.
Csa climate
Higher-output end of the market set
TOPCon, year-one P50, full modeled production stack
P90 from measured resource variability
Longest observed run without a qualifying daily event
Evidence note: yield is modeled; irradiance variability and rain gaps are measured over 2001-2023. P90 covers resource variability only. A 5 mm rain event is a consistent climate threshold, not a guarantee of module cleaning.
A new 7,083-run Pacific low-cloud study strengthens evidence for positive, state-dependent cloud feedback. We carry it as modelled mechanism evidence, separate from the observed irradiance and location-yield records used across this series.
Every part of this series draws on the same live data layer as our reports: NASA GISTEMP surface temperatures, MERRA-2 reanalysis, CERES satellite irradiance, NOAA ocean and circulation indices, and the retail-tariff record across 92 cities. The variables are published one at a time, as each pillar of the record is verified.