Solar silicon panels are the most popular type of the solar panels used in the market today. Some of the reasons are the competitive price and the matured technology. There are two major types; one is mono and the other is poly. However, the poly is the most common due to its cost-effectiveness and yet offering competitive efficiencies. They range from 3W to more than 300W per panel. Voltage and current ratings are different for every size panel which offers great variety for any configuration needed. They have a long lifespan exceeding 25 years and 10 years warranty for any manufacturing workmanship defects. About the power output, a warranty of 10 years @ 90% and 25 years @ 80% of the rated power output. That’s awesome!