Efficiency and quality go hand-in-hand. Cheaper, less efficient panels offer less than 15% efficiency, carry a shorter lifespan, and lose a greater percentage of their efficiency over time. The best panels offer 20%+ efficiency, weather resiliency (wind, snow, hail, fire), and lengthy warranties (10 years and up).
10 rows · Solar panels can also increase the value of your home. A 2011 Berkeley National Laboratory study of 72,000 California houses sold between 2000 and 2009 showed that homes with solar power generally increased in value by about $17,000 more than homes without solar power.