Understanding your 10 year snapshot
What a 10 year total actually shows
Starting from $1,800 in year-one savings, with 3% annual utility rate growth and 0.5% annual panel degradation, total savings reach about $20,152 after 10 years. That's higher than the $18,000 you'd get from simply multiplying year-one savings by 10, since rate growth compounds faster than the modest yearly output decline. Utility rates drive the whole savings calculation, and the US Energy Information Administration's electricity data track them state by state.
Why 10 years is a useful checkpoint
A decade lines up with common milestones: a mortgage refinance, a planned move, or just wanting a more tangible number than a full 25 year projection. It also tends to land close to many systems' actual payback period, making it a natural point to check total value delivered so far against what you originally spent. Output varies by roof and weather, and the output comparison 25 year projection tool shows what your site should produce in a typical year.
How this compares to the full lifetime total
The math here is identical to the 25 year lifetime savings calculator, just stopped at year 10 instead of year 25. Roughly a third of total 25 year savings typically accrue in the first 10 years, since rate growth compounds more heavily in the later years. Over 25 years, upkeep adds up, and the degradation rate comparison by brand tool shows what to budget for it.
What this snapshot doesn't include
This is a savings-only projection. It doesn't subtract system cost, financing costs, or maintenance. Pair it with the total cost of ownership calculator for a full net figure, or the year by year breakdown tool to see every year individually. The US Department of Energy's homeowner's guide to going solar walks through the same decision step by step.