The Roof Master 1.8 KE is undergoing testing at KGHM mine in Lubin, Poland. The machine is designed to work in galleries from 3,0 to 5,8 m height. It is equipped with a mechanized bolting mast for 9 bolts with a height of 1,8 m. The battery installed on board is 120 kWh, sodium-nickel and can be recharged by using the existing mine power network in the 500 – 1000 voltage range. For this purpose a battery charger is built on the machine chassis. The battery will even recharge as the rig is tramming downhill. In addition, the machine is equipped with a closed, air-conditioned operator’s cabin.