Notes: The average price of high-temperature collectors, not shown in this figure, increased dramatically in 1999 from 1998. However, shipments of high-temperature collectors represented less than 0.25 percent of total shipments and thus had little impact on the overall trend.
   Source: Energy Information Administration, Form EIA-63A, “Annual Solar Thermal Collector Manufacturers Survey.”


Description: This line graph shows that the average price of all types of solar thermal collector shipments remained flat at roughly $3.50 per square foot until 1999, when the price started a decline to $2.85 in 2002. The price of low temperature collector shipments decreased from $2.15 per square foot in 2001 to $1.97 in 2002, while the price of medium temperature collector shipments dropped more dramatically from $32.40 per square foot in 2001 to $18.63 in 2002.