Refuge de Bostan, energy renovation with DualSun panels - Samoëns (FR)

  • 2016
  • Samoëns, France
  • Power output : 3kWp + 4,49kWth
  • Panels : 12 Hybrid

Set amidst alpine meadows and lapiaz in the commune of Samoëns (Haute-Savoie), Bostan is a mid-range mountain refuge with a superb view over the Giffre valley.

Set in a sunny valley, it welcomes mountain and fresh-air enthusiasts at an altitude of 1763m.

In 2016 the refuge was equipped with 8 hybrid panels to the south-east and 4 hybrid panels to the west.

Back to this project ????

Energy renovation for enhanced comfort

When you’re in the middle of the mountains and hosting guests, it’s practical to have an energy-sufficient home.

More than 30 years after its inauguration, it was time to give the Bostan refuge a facelift. The energy renovation of this mid-range mountain refuge involved 2 projects.

  • Firstly, the reinstallation and re-commissioning of an existing solar system.
  • Secondly, the construction of a canopy and the installation of DualSun hybrid solar panels on top: 8 PV/T panels to the south-east and 4 PV/T panels to the west.Thanks to this configuration, the DualSun solar system will generate electricity from morning to night.

In fact, the southeast array will be active from morning until midday. From midday to 3pm, both systems are active. Finally, after 3pm, the west-facing installation will take over.

Behind this desire to modernize the refuge there is also an ecological and economic interest: to offer the necessary comfort to the 70 people likely to be at the refuge at any one time, and to operate in energy autonomy.

A wood-burning stove provides heating, while DualSun hybrid panels produce hot water and electricity for the refuge. All this is coupled with an energy storage system. Thermal storage is provided by a 600l hot water tank, while photovoltaic storage is provided by 12 solar batteries. Both electricity and hot water are self-consumed on site.


Technical information

Characteristics Mountain hut (capacity 70 people)
Number of panels 12 DualSun hybrid solar modules
Power output 3kWp + 4,49kWth
Rooftop installation Shade integration, 8 panels facing south-east, 4 panels facing west
Thermal system 2 x 300L storage tanks with gas boiler back-up
Photovoltaic system Enphase microinverters, solar batteries, self-consumption of electricity