Green hydrogen systems integrate production, storage, and utilization components to create closed-loop energy ecosystems. These systems typically include renewable energy sources (solar panels, wind turbines), electrolyzers for hydrogen generation, storage units (metal hydride tanks, pressure vessels), and fuel cells or heat pumps for energy retrieval. For instance, HPS’s Picea system combines solar power, AEM electrolysis, hydrogen storage, and a fuel cell to provide year-round home energy self-sufficiency, with thermal recovery for heating purposes. Such systems achieve high energy utilization rates (up to 90%) by repurposing waste heat from fuel cell operations. Hyto’s systems may offer customizable configurations for residential, commercial, or industrial settings, enabling off-grid resilience and grid stabilization.