Surface-to-air missile. An artist's depiction of a Soviet surface-to-air missile system engaging two F-16 Fighting Falcons. A surface-to-air missile (SAM), or ground-to-air missile (GTAM), is a missile designed to be launched from the ground to destroy aircraft or other missiles. It is one type of antiaircraft system; in modern armed forces, missiles have replaced most other forms of dedicated antiaircraft weapons, with anti-aircraft guns pushed into specialized roles.
Therefore, production year may directly affect the lifespan of your solar panel. The EU energy institute suggests that the large majority of solar panels produced in the last 10 years will have about a 30-year lifespan, as opposed to the 20-year lifespan previously estimated. New panels may reach up to 40 years of life.
Sunspots have been observed at least since the early 17th century, and they are known to follow an 11 year cycle from solar maximum to solar minimum. The solar minimum usually lasts around 16 months, but the current minimum has already lasted 26 months, which is the longest minimum in a hundred years.