Since the beginning of 2005 the Assarel – Medet Group has started investigating the potential of building a wind farm in the region of the Sashtinska Sredna Gora Mountain. Preliminary studies were performed to determine appropriate areas with good perspectives and wind characteristics. In the period from 2005 to 2008 terrains of the main peaks region of the Sashtinska Sredna Gora Mountain were explored and evaluated on a summarized indices basis. The study covered about 200 square kilometers.

Our study let Lisets Peak be determined in March 2008 as the most perspective region for wind park construction with the most favorable wind conditions. The peak is located at an altitude of 1,372 meters and the Sub-Balkan Valley is located to the north of it. Thus, winds descending along the southern slopes of the Stara Planina Mountain accelerate in the valleys that surround the Sredna Gora Mountain and this ensures favorable wind conditions on the peak. Being 1 250 meter long, the ridge of Lisetz peak is also opencast and flat which provides a sufficient area for the construction of wind farm facilities. Moreover, the lack of high vegetation reduces future initial costs for wind generators sites formation and provides better conditions for wind energy production.

The state of the electric network and transport infrastructure in the region is also crucial for the future investment efficiency. At the moment it can be reached via a dirt road which can be adapted for heavy facilities transportation after some small investment is made. Lisetz peak provides also favorable conditions for electricity network connection. There is a 110 kV power line passing 2 km away from the peak which currently addresses the needs of Assarel-Medet JSC but may also be used as a connection between the wind farm and the electricity distribution network.

In the period after March, 2008 measurement of wind capacity was conducted at five different points via wind monitoring met masts. Its purpose was to verify or reject the appropriateness of the explored terrains. The results of the modeling process demonstrate that the explored region is appropriate for the construction of a wind farm with capacities in the range of 10-20 MW.