What is the life expectancy of solar roof tiles?

What is the life expectancy of solar roof tiles?
     
The life expectancy of solar roof tiles typically ranges from 25 to 40 years, depending on the quality of materials, installation, and environmental factors.

🔍 Key Factors Influencing Lifespan:

Tile Quality & Materials

High-quality solar tiles (like those using monocrystalline solar cells) can last 30–40 years.

The structural material — such as aluminum-zinc steel or tempered glass — affects weather resistance and durability.

Power Output Degradation

Solar tiles generally lose 0.3% to 0.5% efficiency per year, meaning after 25 years, they may still produce 80–90% of their original output.

Installation Quality

Professional, watertight installation ensures both solar performance and roof protection, preventing water leakage or structural issues that could shorten lifespan.

Environmental Conditions

In regions with extreme weather (hail, heavy snow, intense sun), the tiles might age faster — though good-quality systems are rated to handle these.

Manufacturer Warranty

Many solar tile systems come with 25-year performance warranties and 10–30 years product warranties — a good sign of long-term reliability.

✅ Summary:

Expected lifespan: 25–40 years

Peak performance period: First 25–30 years

Degradation: ~0.5% per year