For other uses, see Sun (disambiguation). The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, with internal convective motion that generates a magnetic field via a dynamo process. It is by far the most important source of energy for life on Earth.
Buying and installing a customer-owned aboveground propane tank runs about $450-$1,000 for a 120- or 250-gallon tank and $800-$2,500 for a 500-gallon aboveground tank. Installing an underground tank can cost around $1,800-$3,000 for 500 gallons and $2,000-$3,500 or more for 1,000 gallons. A Wisconsin propane dealer charges $1,599 to install a typical 500-gallon aboveground tank and $2,995 for a 1,000-gallon underground tank.
From October 2012 to March 2013, the average weekly price varied from from $2.195-$2.319, or about $880-$1,050 to fill a 500-gallon tank; between 2005 and 2010, prices averaged $1.73-$2.66 a gallon, or $690-$1,070 to fill a 500-gallon tank. With three to five fill-ups per six-month season, total winter costs could be $2,000-$5,500. Propane is a byproduct of oil and gas production, and in the past propane prices rose and fell in tandem with the cost of crude oil.