The Data
Here's what it actually shows.
Energy Payback Time (modern Si panel)
1–3 years
Source · NREL
Typical panel warranty
25–30 years at ≥85% output
Source · SEIA
Financial payback (cash purchase, avg. US)
6–10 years
Source · EnergySage 2024
Net lifetime savings (avg. 25-yr system)
$20,000–45,000
Source · EnergySage