Apart from improving its energy efficiency, Telekom Austria Group also relies on the use of sources of renewable energy. For while the burning of fossil fuels represents one of the largest sources of CO2 emissions in the world, the exclusive use of power generated by means of sources of renewable energy is considered carbon-neutral. Telekom Austria Group therefore promotes the use of sources of renewable energy as well as the implementation of its own projects in this area. This is supposed to increase the share of renewables and lower CO2 emissions.

Austrian subsidiary A1 has managed to operate its network exclusively with power from sources of renewable energy since late 2014, Slovenian Simobil sources 67% of its power from renewables. Additionally, A1 – as the first communications provider in Austria – has been operating its network in an entirely carbon neutral network way since May 2014.

Solar power systems

Photovoltaikpark AflenzFor several years now, Telekom Austria Group has been building its own systems to produce renewable energy working with photovoltaics, the conversion of sunlight into electrical power. The earth station in Aflenz in Austria has been supplied by its own solar power farm since 2013 which, since the completion of its 2nd stage of expansion in 2014, includes a total of 790 modules with a total surface area of 4,800 m² and a total output of 195 kWp. Thus, it can produce more than 180,000 kWh of solar power annually and directly feed it into the earth station.

A1 thereby further contributes to slowing down climate change and saves up to 90 tons of CO2 annually.

Hybrid power supply for mobile communication base stations

Hybride BasisstationA wide-ranging contribution to climate and environmental protection must reach beyond increasing energy efficiency. For even the most extensive reduction in energy demand can never lead to zero power consumption. That’s why it is all the more important to cover the remaining power demand as sustainably as possible

In 2015, a solar power station was built in the Austrian Nockberge National Park 2,000 m above sea level which allows savings of 1,000 litres of Diesel per year. In Croatia, Vipnet operates more than 50 transmitting stations at least partly with solar or wind power.

Together with the electronics company KonĨar, Vipnet has developed a hybrid power supply system for mobile communication base stations and has already put them into service in a commercial way at two locations in Croatia. Further base stations have been equipped with this hybrid power supply system since then, not just in Croatia, but also in Slovenia. The modular component system consisting of solar power, wind turbines, energy-optimised container ventilation systems and hydrogen fuel cells allows for an almost entirely independent power supply.

one.Vip in Macedonia also relies on supplying its mobile communication base stations with power from sources of renewable energy. Furthermore, solar-powered mobile phone charging stations were installed in public places.

Hybrid ventilation

Hybrid ventilation combines the benefits of natural ventilation with those of mechanical ventilation and uses both systems in accordance with demand. A1 has been using hybrid ventilation which employs wind power as a natural source of power since 2011. The special layout of the rotor blades used by this system yields a suction effect which extracts hot air from the room to be cooled. The result: Even during the hot summer months, air conditioning units need to be switched on up to 50% less frequently. Thanks to this  efficient and energy-saving ventilation method, the power consumption of air conditioning units can be reduced by a total of 75%.

Sustainability Report

Evolving sustainably with digitalisation

Sustainability Report 2016/17


Petra Gallaun

Irene Jakobi

Head of CSR
Telekom Austria Group & A1