The Building

Building pre-intervention

Building pre-intervention: Collège Ferlens_Pre_1_(C)Akash arts.jpg
Building pre-intervention: Collège Ferlens_Pre_2_(C)Jorat-Mézières.jpg

Building post-intervention

Building post-intervention: Collège Ferlens_Post_1_(C)Freesuns.jpg
Building post-intervention: Collège Ferlens_Post_2_(C)Freesuns.jpg

Former college, Ferlens

In the centre of Ferlens, a small municipality of some 300 inhabitants merged since 2014 under the name of Jorat-Mézières, stands the former college. This magnificent building, with its old clock, its fish-scale bell tower and its green shutters, contributes to the picturesque character of the village. Built in 1823, this listed building belongs to the commune. The municipality has decided to renovate it in 2022.

The Solution

Solution post-intervention

Solution post-intervention: Collège Ferlens_Post_3_(C)Freesuns.jpg
Solution post-intervention: Collège Ferlens_Post_4_(C)Freesuns.jpg
Solution post-intervention: Collège Ferlens_Post_5_(C)Freesuns.jpg
What is the Solution?

In order to respect the architectural heritage of the building, the choice fell on Freesuns solar tiles, which reproduce the look of traditional Vaud terracotta tiles. Although only the southern side was covered with solar tiles, the most exposed to the sun, the new solar tiles blend in perfectly with the rest of the roof.

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
18° (S-W)
Slope
41°
Area (m²)
162
Availability
Yes, available on the market
Manufacturer
Freesuns
Model
Solaris VDiamond A1/M1
PV module format
Customized modules
PV module format max
Basic dimensions of the tile : 730 x 400 mm (730 x 140 mm)
PV module type
Glass-Glass
PV cells technology
c-silicon
PV module efficiency
9,69/9,28%
Total PV power
15 kW
Surface PV power (W/m²)
96,9/89,6 W/m2
PV energy production
abt. 15'000 kWh/yr
Weight
40,53 kg/m2
Dummy modules used?
Yes
Frame
No
Overlapping
Yes
Colorization
Yes (coloured modules)
Colorization technology
Coloured foil
Glass structure
Shiny (with antireflection)

Before retrofit

After retrofit

Assessment

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

Location

1076 Ferlens VD, Switzerland - 749m
Climatic Zone:Cfb