Hellisheidi Geothermal Plant is situated at the Hengill area, an active volcanic ridge in SW Iceland connected with three volcanic systems. At least three volcanic eruptions have occurred in the Hengill area in the last 11,000 years, the most recent being 2,000 years ago. The Hengill area is part of the Hengill region, which covers 112 square kilometers and is one of the most extensive geothermal areas in Iceland.
Hellisheidi Geothermal Plant purpose is to meet increasing demand for electricity and hot water for space heating in the industrial and domestic sectors. Production capacity is 303 MW electricity and 133 MW thermal energy.