"Currently panels drop to 80% efficacy after 10 years and are doorstops in 20" This wasn't true when I manufactured them almost a decade ago. We were offering

"Currently panels drop to 80% efficacy after 10 years and are doorstops in 20" This wasn't true when I manufactured them almost a decade ago. We were offering 30 year warranties with only 15% drop after 30 years - polycrystalline 20% efficiency.