Conventional solar cells corrode and break over time reducing power output dramatically. SunPower technology is better by design. Our unique solid copper backing is incredibly strong, handling stress and moisture like no other... So you know you have the very best solar system overhead. In the most extreme situation, any solar cell can get a hairline crack even ours. But our solid copper back keeps the SunPower cell in tack producing energy at full power, no problem. What happens with a typical conventional solar cell, good luck getting any power with that. That's why we stand behind every SunPower panel with an exclusive 25 year combined power and product warranty. You'll feel good knowing we'll replace any defect free of charge. Any even better knowing 1 of 20,000 panels is ever returned under warranty. So what the moral to this story? Not all solar is created equal and with 30 years of experience, SunPower delivers quality that lasts.
