How long do solar panels last?
Most panels carry 25-year warranties and keep producing for 30+ years, losing roughly 0.5% output per year. An inverter may need replacement once during that…
Most panels carry 25-year warranties and keep producing for 30+ years, losing roughly 0.5% output per year. An inverter may need replacement once during that time, so include it in the cost.
Why lifespan decides whether panels pay off
Solar panels are a long-term purchase, so their value depends on producing power reliably for decades, not just performing well in year one. Panels do not usually stop suddenly; they fade slowly, which is why the page's gentle yearly decline matters when you compare quotes and savings estimates. The supporting equipment tells a different story, especially the inverter, which may need replacing once during the system's life. Understanding which parts last, and which do not, turns a sales pitch into a plan you can budget for.
What to do, step by step
- Before buying, ask which warranties cover the panels, the inverter, and the installation work, since each can differ.
- Keep your paperwork, system details, and installer contacts together so a future claim or repair is easy.
- Check your production readings regularly, because a sudden drop is easier to spot when you know your normal pattern.
- Follow the maker's cleaning and inspection guidance, and use a professional for roof or electrical work.
- Budget ahead for an inverter replacement during the system's life instead of treating it as a surprise cost.
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