Annual Efficiency Decline in U.S. Solar Power Installations Detailed

In the United States, one million new solar power installations were brought online in the past two years alone. The cumulative output of these installations is currently sufficient to power about one-third of U.S. homes. Industry reports indicate that solar panels inevitably lose efficiency over time, with the annual average loss ranging from 0.3% to 1%, averaging about 0.5% across the industry. This efficiency loss is categorized into three types: light-induced degradation (LID), potential-induced degradation (PID), and aging-related degradation (AID).

LID primarily affects older P-Type panels and can cause an initial loss of 1% to 3%. This initial loss is unavoidable and is often referred to as an adjustment stage. Modern N-type panels have largely eliminated this specific factor.