Residential building Lausanne — Geothermal + 80 solar panels

Context

The client came to us with an advanced brief: rising energy bills, end-of-life equipment, ambition for maximum autonomy. Our role: scope it technically, size it precisely, and coordinate everything.

The challenge

Combining two technologies (e.g. HP + PV) in an existing building demands attention: cross-sizing, load profiling, quality of grid connection. Without a system approach, two solutions can interfere with each other.

The deployed solution

• Geothermal heat pump with vertical probes.
• Photovoltaic installation optimized for self-consumption.

Measured outcomes

After 12 months of monitoring, the figures matched the simulation within ±5%. Exactly what the client expected: no empty promises, measured data.

The project was carried out with tenants in place without any disruption. Charges reduced by 35%.