The result lived up to our expectations, since in this solar city of Plan-Les-Ouates, we observe a consumption of 60% less than the Swiss average (at the time), which represents an annual saving of 14’000 litres of fuel oil or an energy expenditure index of 250MJ/m²/year (the Swiss average is 725 in 2012).
In 1995, ERTE completed this project. The SUNERGIE® system used was installed almost 30 years ago and is still in operation today. The solar thermal collection of curved roofs was a first for Switzerland and is suitable for both large-scale installations (villas) and large-scale complexes.
This achievement earned ERTE the 1995 Solar Prize in the category of planners.