U.S.-based startup HyWatts has developed the Powerplant-in-a-Box system, a groundbreaking technology that functions as a reversible high-temperature proton exchange membrane (HTPEM) fuel cell and electrolyzer. This system is tailored for providing renewable energy in remote locations, offering a solution that does not require network infrastructure enhancements. Unlike traditional LTPEM fuel cells, the HTPEM system uses a phosphoric acid-doped membrane that eliminates the need for permanent humidification, allowing for a wider operating temperature range of 120 C to 180 C. Additionally, HyWatts' patented bipolar plate (BPP) technology enables direct air cooling for megawatt systems, simplifying the power generation subsystem. The company emphasizes the use of cost-effective materials and manufacturing processes, such as stainless steel BPPs with proprietary coatings. HyWatts projects that for a community of 50 off-grid homes, energy supply can be maintained at $0.12/kWh, with 1 kg of hydrogen covering a U.S. household's energy needs for a day. Furthermore, the system has been tested as a hydrogen supply gas for industrial processes, offering energy at a marginal cost of $2.38/kg. HyWatts' technological advancements represent a significant step towards efficient and affordable energy solutions for various applications.