The Building

Building pre-intervention

Building pre-intervention: Uni Breguet Neuchâtel_Pre_1_(C)UniNE.jpg
Building pre-intervention: Uni Breguet Neuchâtel_Pre_2_(C)Académie journalisme-médias.jpg

Building post-intervention

Building post-intervention: Uni Breguet Neuchâtel_Post_1_(C)Freesuns.jpg
Building post-intervention: Uni Breguet Neuchâtel_Post_2_(C)Freesuns.jpg
Building post-intervention: Uni Breguet Neuchâtel_Post_3_(C)Freesuns.jpg

Bâtiment universitaire Breguet 2, Neuchâtel

The roof of the Breguet 2 building required urgent rehabilitation after years of wear and tear. In light of the historical importance of this building, its restoration was undertaken with great care.

The Solution

Solution pre-intervention

Solution pre-intervention: Uni Breguet Neuchâtel_Pre_3_(C)Académie journalisme-médias.jpg

Solution post-intervention

Solution post-intervention: Uni Breguet Neuchâtel_Post_4_(C)Freesuns.jpg
Solution post-intervention: Uni Breguet Neuchâtel_Post_5_(C)Freesuns.jpg.jpg
Solution post-intervention: Uni Breguet Neuchâtel_Post_6_(C)Freesuns.jpg
What is the Solution?

The Freesuns solar tiles, combining traditional aesthetics and innovation, allowed this roof to be restored with elegance and durability. These tiles offer optimal protection against the elements and improve the energy efficiency of the building, embodying the perfect fusion between heritage and modernity.

Why Does it work?

The solar tiles are perfect for such listed buildings, providing here 100% full coverage without altering the visual aspect of this heritage protected building.

PROS
  • Adaptable to site/building requirements (colour, texture, shape)
  • Resemblance to tiles (mimetic).
  • Preservation of the appearance of the listed building while producing energy in the roof.
CONS
  • Lower energy performance than standard modules.
  • Number of elements and "one-off" pieces.
  • More demanding to implement.
  • Much higher costs than a standard solution.
Type of installation
Replacement (building integrated - BIPV)
Part of the building
Roof only
Mounting system
information not available
Orientation
Divers orientation from S-E to N-O via S-W and N-E
Slope
Divers slopes from 25° to 55°
Area (m²)
1128
Availability
Yes, available on the market
Manufacturer
Freesuns
Model
Solaris Heritage
PV module format
Customized modules
PV module format max
Basic dimensions of the rectangular tile : 700 x 460 mm (700 x 175 mm)
PV module type
Glass-Glass
PV cells technology
c-silicon
PV module efficiency
13.82%
Total PV power
119 kW
Surface PV power (W/m²)
138.2 W/m2
PV energy production
abt. 95'000 kWh/yr
Weight
47 kg/m2
Dummy modules used?
Yes
Frame
No
Overlapping
Yes
Colorization
No (black modules)
Colorization technology
No colorization
Glass structure
Mat/Satin-finished

Before retrofit

After retrofit

Assessment

PV installation type
Replacement (building integrated - BIPV)
PV position
Roof only
Coloured PV
Yes
Module efficiency
10% < Efficiency <= 15%
Building alteration
Yes, the building envelope was modified in a non reversible way
Investment cost
High
Circular approach
No

Location

2000 Neuchâtel NE, Switzerland - 434m
Climatic Zone:Cfb