An integrated system consisting of several devices for harnessing renewable sources of energy is considered. The devices include helio-hydro-gravity, salt gradient solar pond, buoyant generator, solar desalination and solar bowl. The useful energy is recommended to be stored in hydrogen form. Methods of producing hydrogen such as thermochemical, electrolytic, magnetohydrolytic and photolytic are briefly described and suggested to be used in appropriate cases. The entire system is conceptually discussed with some proven examples.