Baar, 16.10.2020

Axpo builds a free-standing solar panel system

Axpo is building a free-standing solar panel system on the industrial site of the Altgass substation in Baar. The plant will be put into operation this November and is expected to produce renewable electricity for around 70 local households in the future.

Large solar panel systems on open spaces are rare, and are hardly feasible in Switzerland due to the restrictive legal situation and tight space conditions. According to the press release of the energy group, Axpo can use an industrial area on the site of the Altgass substation for an open-air plant. The substation was completely renovated five years ago in view of the increasing demand for electricity in the Zug area, and the grid voltage was increased. The existing open-air switchgear was dismantled, and replaced by a more compact, gas-insulated switchgear. The area that has thereby become vacant is well suited as a location for a solar system.

Photo 1: The new solar system at the Altgass substation: in consideration of the appearance of the local area, modules with a black frame were chosen.

Photo 2: Location of the site on the Altgass substation indicated in red: This is where the new photovoltaic (PV) system is being built. The open-air switchgear has been dismantled.
Framed in green: the existing PV system on the WWZ AG building.


1,020 solar panels to be installed
The photovoltaic system, with an installed capacity of 400 kWp, is being realised in close consultation with the canton of Zug, taking the legal requirements as well as aspects of the environment, townscape and economic efficiency into account. 1,020 panels are planned on an area of 2500 m2  and with a yield of around 300,000 kWh/year. The selected modules with their black frame provide a calm overall appearance and blend in with the townscape. The plant is being built by Axpo subsidiary CKW.

WWZ to sell the electricity produced
The renewable electricity produced is to be purchased by the partner WWZ AG and will be distributed in the region. The construction of the plant is expected to take place by the end of October, with the commercial commissioning planned for November 2020. Photovoltaic is an important growth market for Axpo. Further locations at Axpo substations are being examined for the installation of further solar panel systems.