Project Description

Vienna’s aqua terra zoo relies on solar power

As part of the conversion of the Haus des Meeres, Wien Energie is installing a solar roof consisting of 202 photovoltaic modules. This photovoltaic system covering an area of 800 sqm will generate at least 63 kWp of solar power. What is unique about this new solar roof is the use of special bifacial glass-glass solar modules which generate power not only from above but also from below. By means of this innovative project, both companies are making an important contribution to the expansion of renewable energy production in the city.

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Project details

This photovoltaic system will generate at least 63,000 kWh of power a year. This figures excludes the power generated by the underside of the panels as their actual output still needs to be tested in situ. This will be sufficient to cover the entire electricity requirements of the new extension.

The bifacial modules generate power on both sides. They take advantage not only of direct solar radiation on the upper surface but also indirect solar radiation from the environment – from sunrise to sunset. This is a novel concept in Austria. The use of these special modules is expected to generate up to 10% more power.

The conversion of the old flak tower is creating around 3,000 sqm of new space. The majority of this will benefit the animals and visitors, and the roof-top café is also being enlarged. The photovoltaic system being installed will not only generate solar power but also provide shade for the café. The special steel construction and the semi-transparent solar panels will still allow visitors to enjoy spectacular views. As a result, the roof area will not only be efficiently used but also act as a visible landmark for environmentally-friendly energy production.

Michael Strebl

“This innovative project will further extend the use of photovoltaics in the city. On an area of 800 square metres, we are installing an innovative solar roof which will also generate power via indirect solar radiation from the environment. This is a novel concept in Austria. As a result of using these special modules, we expect to generate up to ten percent more power at this site.”

Michael Strebl, General Manager of Wien Energie

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