ENERGY FLOW: REGULAR
Model 20 years of declining PV output, rising electricity rates, cumulative savings, and break-even with annual degradation.
Year 20 total yield
Break-even year
Total 20-year savings
Year 20: 9,990 kWh · 39,582 saved cumulatively
Tier-1 modules typically lose about 0.5–0.8% per year of output (compound). Warranties often guarantee 80–85% of rated power at 25 years—your modeled year-25 retention at this %/yr is about 86.6%.
Rising retail rates partially offset lower kWh; this calculator applies your energy inflation % to each year's savings while production declines.
Save Report: Download your battery and solar calculation specs as a private PDF via JoinMyPDF.
More tools in this category and beyond