For example the median expected annual pay for a typical Geologist I in the United States is $43,492, so 50% of the people who perform the job of Geologist I in the United States are expected to make less than $43,492. Source: HR Reported data as of March 31, 2017.
The Planta Solar 20 (PS20) solar power plant is pictured here alongside its older cousin, PS10. Located in Sanlucar la Mayor, Spain, it once held the title of the world's most powerful solar power tower, until the Ivanpah Solar Power Facility in California was switch on in 2014. The Spanish 20-megawatt (MW) solar power tower was completed back in 2009, and has the capacity to power 10,000 homes.
As you may imagine, the most effective solar panels have the highest cost. The most effective and most expensive type of solar panel is Monocrystalline, which is constructed from one continuous sheet of silicone. Slightly less expensive, and less effective, is Polycrystalline.