The Picea system from HPS Home Power Solutions enables zero-carbon homes by integrating solar energy, green hydrogen production, and fuel cell technology. Surplus solar power from rooftop PV panels is converted into hydrogen via an electrolyzer, stored, and later used in a fuel cell to generate electricity and heat. This closed-loop process eliminates reliance on fossil fuels, ensuring 100% carbon-free energy supply year-round. The system’s waste heat recovery further reduces heating demands, aligning with EU and German mandates for carbon-neutral buildings by 2030. For example, the Picea-equipped show house in Asperglen-Rudersberg demonstrates how solar-hydrogen integration achieves net-zero emissions while providing 100% energy independence.