Solar Year 8 Reality Check

Your proposal's 25-year savings number depends on two big assumptions: how quickly panels lose output, and how fast your utility rate rises. This tool re-runs that math against industry-median degradation and NY's actual rate history. The real trajectory is almost always underneath the marketing line.

• Production trajectory across three degradation scenarios, out to year 25.
• Compares the installer's rate-inflation assumption to NY's historical baseline.
• Turns the installer's 25-year savings claim into a realistic dollar range.