Completed 2019–2022

G2 Solar — a solar cadastre for Greater Geneva

A cross-border Interreg project that built, validated and put to work a building-by-building solar cadastre covering the Greater Geneva agglomeration.

Role

Researcher

Funding

Interreg France–Suisse

Partners

hepia / HES-SO Genève
LOCIE, Université Savoie Mont Blanc / CNRS
Canton de Genève

Greater Geneva is a single functional territory split across a national border, which makes coordinated solar planning unusually difficult and unusually valuable. The G2 Solar project developed a solar cadastre covering the agglomeration's building stock — around 265,000 buildings — including façades as well as roofs.

The work spanned the whole chain: a radiative model, numerically validated against reference simulations; a large-scale multicriteria assessment of which buildings are most suitable for photovoltaic integration; and an analysis of how such a cadastre feeds into solar governance across a transborder agglomeration. The resulting datasets and methods have since supported both local authorities and a series of follow-on studies.