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11.04.22

A Swiss house powered by solar even in winter

StadtparkPLUS house features E3/DC storage system

Energy from renewable sources is growing at an astonishing rate. To curb global warming, we must curb our CO2 emissions – the two largest sources of these emissions are our buildings and our vehicles. Logically, making our buildings as well as our modes of transport CO2-neutral is the key to low-carbon living.

HagerEnergy brand E3/DC has long been selling a home power station which allows for homeowners to produce and store solar energy, making them energy independent and nearly CO2 neutral, especially when the same solar power is used to fuel an electric vehicle. With recent developments in bidirectional charging, the batteries of such vehicles will soon be able to serve as storage for surplus energy to be fed back into the domestic system when the sun is not producing enough energy to power the needs inside the building.

Enough storage is the key
But even without the latest technology of bidirectional charging E3/DC has supplied a major component to Zurich architectural practice argento AG’s “StadtparkPLUS” development, one of the first houses in Switzerland to be 50% energy-independent even in winter.

Architects Franz Schnider and Matthias Sauter have for years been designing houses which produce surplus energy, using photovoltaics combined with heat pumps and energy storage. In December 2021 they finished the third in a series of buildings which do more than produce surplus energy in the summer: they are capable of covering 50% of all domestic energy requirements even in Swiss winter.

Using the façade
To achieve this, Schnider and Sauter cover the south-facing walls for of their buildings in solar panels in addition to the roof. For StadtparkPLUS, panels were made-to-measure to fit the shape of the building. They are complemented by an E3/DC storage unit enabling the building to enjoy 50% energy autarky even in winter. Hager Energy’s Quattroporte 2x MAX XXL system offers up to 46,8KWh usable storage facility, making it possible to store surplus solar energy which can be released when needed.

A special house
Situated in Wetzikon near Zurich, the building sets itself apart from its predominantly white neighbours in having a grey façade which only at second glance can be identified as being owed to solar panels. Whenever possible, the architects prefer using natural materials such as clay, cork, wood or other recyclable materials for their buildings. StadtparkPLUS, however, is surrounded by many roads and close to a train track, making strong sound proofing a necessity. Schnider and Sauter did stick to wood with the balconies, giving the building a distinct and arresting look and also managed to add clay to the construction material of the walls.

The house unites four households under one roof – the major part of thesolar power generated (around 30.000KWh/year) is being consumed by the inhabitants and for running all technical installations including a geothermal probe heat pump. To push the low-carbon living concept one step further, the developer furnished each unit with an electric vehicle, installing E3/DC wallboxes in the garage for charging.

The geothermal probe heat pump is responsible for heating as well as cooling the building – clay walls allow for an impressive cooling down to around 23 degrees in the summer using minimal energy.

Shared costs
The costs associated with made-to-measure solar panels can be quite prohibitive, but Schnider and Sauter were building for four parties which were sharing the burden. Also, as Schnider points out: “from our children’s perspective, this cannot be said to be too expensive at all”. Another of arento AG’s projects, SonnenparkPLUS, will house substantially more units, making the individual price for low-carbon living even more affordable.

Convinced of the great CO2 saving potential of their concept, Schnider and Sauter are determined to continue working with solar façades. We are delighted to have been selected as one of their partners and look forward to many more exciting projects in Switzerland.  

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We are delighted to announce the renewed success of our E3/DC brand in being named a German brand of the century for the third time.


Smart charging & EV are the future. How do Hager Group accompany you in this transition?

Electric cars now make up ten percent of new car purchases in Europe and this rate is still growing.


08.12.21

E3/DC by HagerEnergy: German brand of the century

We are delighted to announce the renewed success of our E3/DC brand in being named a German brand of the century for the third time.

07.12.21

Smart charging & EV are the future. How do Hager Group accompany you in this transition?

Electric cars now make up ten percent of new car purchases in Europe and this rate is still growing.


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