With Solar Thermal Technology, Hervé Produces His Own Electricity, Hot Water, and Heating in the Vosges

  • 2025
  • Chavelot, France
  • Power output : 6.3 kWp
  • Panels : 15 hybrids

In Chavelot, in the Vosges region, a new pilot project has been launched in collaboration with a local installer, integrating our latest hybrid technology, the SPRING4, in a solar thermal configuration.

Hervé, a sales engineer and former plumber, chose to optimize his energy efficiency with an installation combining:

  • 15 Dualsun SPRING4 hybrid panels, installed across two roof slopes (10 panels facing south, 5 facing west)
  • An Arktéos INVELIA 9 kW heat pump, coupled with the panels to maximize solar thermal energy usage
  • A modern, well-insulated, single-story home, allowing for optimal system performance

This project aims to reduce energy consumption and enhance self-consumption. Thanks to this installation, Hervé benefits from a solar system that simultaneously produces electricity, domestic hot water, and contributes to home heating—a truly innovative solution from Dualsun.

A Project to Measure Solar Thermal Performance in Cold Climates

This installation is a strategic initiative for Dualsun: a pilot site in a cold region to analyze how solar thermal technology performs in harsh winter conditions.

By monitoring performance over multiple seasons, we will gather valuable data on the impact of hybrid panels combined with a heat pump in real-world conditions. The goal is to demonstrate the reliability and efficiency of this technology for homes in regions with cold winters.

The Benefits of Combining Hybrid Panels and a Heat Pump

The Dualsun SPRING4 hybrid panel is based on an innovative dual-function design:

  • A photovoltaic side that generates electricity for self-consumption
  • A patented heat exchanger that captures solar heat to supply the hot water tank and/or improve a heat pump’s efficiency

In this project, the combination with an Arktéos heat pump optimizes solar thermal energy usage, reducing electricity consumption for heating and hot water production.

➡️ The Performance and Production of a Solar Panel [Guide]

A Pilot Project Demonstrating Solar Thermal’s Potential

Ultimately, this pilot project aims to showcase solar thermal energy as a game-changer for well-insulated homes looking to maximize their energy independence. The first performance analyses will provide key insights into the efficiency of the hybrid panel + heat pump combination, particularly under winter conditions.

Beyond this, Dualsun continues to support its partners and clients in adopting cutting-edge solar solutions, providing technical expertise and in-depth project monitoring.

➡️ Find the Best Solar Panel Installer

 

Other Pilot Sites Are Already in Place – Check Them Out!

 

 

 

“I wanted a solution that maximized solar energy to cover my energy needs. Thanks to Dualsun’s SPRING4 hybrid panels, combined with an Arktéos heat pump, I can power my hot water tank and support my home’s heating while also producing electricity. It’s a true energy revolution!” – Hervé

Technical information

Characteristics House 100m2
Number of panels 15 Dualsun SPRING4 hybrid panels
Power output 6.3 kWp
Rooftop installation Facing south and west, inclination 20°.
Thermal system Arktéos INVELIA 9 kw heat pump
Photovoltaic system K2 system, string inverters, self-consumption with sale of surplus electricity