According to the Green Coast, the average solar panel degradation rate is 0.5% per year. This means that after 20 years, your system could be producing up to 20% less electricity than when it was new.

The International Energy Agency (IEA) also emphasizes that monitoring performance and scheduling timely replacements ensures systems remain efficient and cost-effective.

Here are the most common signs it’s time to consider replacement:

✅ Significant drop in energy output compared to past years

✅ Physical damage like cracks, hot spots, or discoloration

✅ Frequent inverter warnings or malfunctions

✅ Panels damaged by storms or environmental factors

If you notice these issues, replacement may be the most cost-efficient solution.

Replacing old or damaged panels ensures you:

✅Regain lost efficiency and maximize electricity production

✅Lower reliance on grid power and reduce energy bills

✅Keep warranties valid through professional upgrades

✅Reduce the risk of unexpected system failures

For homeowners, it’s not just maintenance — it’s securing your energy future.

When replacing panels, consider:

・System compatibility with existing inverters and mounting structures

・High efficiency ratings for better output per square meter

・Warranty coverage for long-term protection

・Reputable manufacturers for reliable performance

👉 Explore GBP’s Solar Panel Replacement Solutions
for panels designed to integrate seamlessly with existing systems and meet international standards.

Most solar panels should be replaced every 20–25 years, or sooner if you notice performance issues. Replacement is not only about keeping your system running — it’s about maximizing efficiency, savings, and sustainability for decades to come.

Partnering with experienced providers ensures your new system performs at its full potential from day one.