Solar panels installed on your Colorado home will typically last 25 to 30 years before needing replacement, but here’s what that number really means: your panels won’t suddenly stop working when they hit their 25th birthday. Instead, they’ll continue generating electricity well beyond three decades, just at a gradually reduced efficiency.
The industry standard warranty of 25 years guarantees that panels will still operate at 80-85% of their original capacity by that point. That efficiency drop, about 0.5% per year, happens …