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IPV
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Photovoltaic

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IEA PVPS Task 15 project aims to create an enabling framework to accelerate the penetration of BIPV products in the global market of renewables.

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Operazione co-finanziata dall’Unione europea, Fondo Europeo di Sviluppo Regionale, dallo Stato Italiano, dalla Confederazione elvetica e dai Cantoni nell’ambito del Programma di Cooperazione Interreg V-A Italia-Svizzera

House Brunner-Bapst

new construction

conservation area

Building use: 
residential
IPV architectural system: 
opaque roof
IPV integration year: 
between 2016 and 2020
Source: 
BIPV meets History project

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House Brunner-Bapst

Waltensburg, Switzerland

Introduction

Stakeholders

Design approach

Aesthetic integration

Energy integration

Technology integration

Lessons learnt

Data

Producer and installer

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In 2020, the Brunner-Bapst farming family built a PlusEnergie single-family house in Waltensburg with the highest solar energy supply ever installed in Switzerland up to that point. The BIPV system covers the entire roof of the building.

Sources: Norman Foster Foundation, Solargentur.CH

STAKEHOLDERS

Main building designer: 

Bearth & Deplazes Architekten AG, Silvana Janett

IPV system installer: 

Solpic AG

Address: 
Via S. Clau Sura 18, Ilanz, Switzerland
Contact: 
info@solpic.ch
Web: 
https://solpic.ch/

With large glass and wood façades and a simple design, the new building blends into the surrounding landscape. The BIPV system is part of modern building design based on energy efficiency and the use of renewable energy. The project won the Norman Foster Solar Award in 2020.

BIPV modules are arranged in a regular and coplanar manner on both roof pitches and do not require inactive elements to fully cover the surfaces. They give the roof a dark and uniform appearance. Elements of a different colour from the modules were inserted to connect the two pitches along the roof ridgeline.

The BIPV system produces 40,200 kWh per year, covering 817 % of the building's electrical consumption, a Swiss and European PEB record. Due to the 20 to 30 cm thick insulation of the walls and roof, class A++ appliances, and LED lighting installation, the electrical demand is relatively low and equals approximately 4,915 kWh per year. The surplus of approximately 35,239 kWh is partly used for charging electric cars using charging stations connected to the system. The remainder is sent to the network.

The BIPV modules completely cover both the east and west pitches of a large roof that produces energy and extends far beyond the building, protecting it from wind and weather. They replace the traditional roof elements.

It is estimated that the energy produced prevents the emission of almost 2.6 tonnes of CO2 in the atmosphere.

PROJECT DATA

Project type: 
new construction
Heritage constraint: 
conservation area
Building construction technique: 
postwar
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BIPV SYSTEM DATA
Architectural system: 
Opaque roof
Integration year: 
2020
Active material: 
Polycrystalline silicon
Module transparency: 
opaque
Module technology: 
glass-glass, recognizable PV, standard modules
System power [kWp]: 
48.36
System area [m²]: 
270.4
Modules orientation: 
East, West
Annual PV production [kWh]: 
40,200
IPV system installer: 

Solpic AG

Address: 
Via S. Clau Sura 18, Ilanz, Switzerland
Contact: 
info@solpic.ch
Web: 
https://solpic.ch/
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Waltensburg, Switzerland
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