Opposite to conventional central energy systems from the fossil fuel era decentralized energy systems based on renewable energies are offering the energy and power mainly via a lot of distributed  - more or less - smaller or middle-sized plants, nearer to the demand sides. The power-/ energy units from wind energy, photovoltaic, water & marine power, solar thermal, geothermal, etc. should be combined with respective storage technologies and smart computer based energy management hard- and software. For more information and facts please visit e.g.: https://www.pv-magazine.com/2022/03/29/designs-for-solarstoragehydrogen-systems-in-buildings/ or https://www.biologicaldiversity.org/programs/energy-justice/pdfs/2022-4-27_Letter-to-World-Leaders-re-End-Fossil-Fuel-Era-Accelerate-Transtion-to-Renewable-Energy.pdf or https://en.wikipedia.org/wiki/Distributed_generation or https://www.tdworld.com/distributed-energy-resources/article/20972186/the-decentralized-energy-future-is-coming or https://www.advancedsciencenews.com/decentralized-renewable-energy-systems-a-status-quo-analysis/ , last visit: 08. May 2022.