Abstract <p>Powering engineering systems with natural, sustainable energy sources, in particular, solar energy technologies, helps decrease energy costs, thereby reducing production costs as well as the anthropogenic load on the environment. The study analyzes long-term hydrometeorological data and processes them using mathematical statistics methods, which involves assessing correlation reliability and constructing regression equations for forecasting the natural and climatic conditions along the coast of the Garabogazköl gulf in the Caspian Sea. Natural solar energy resource potentials of the gulf coast are considered. Innovative techniques are used to solve the problems of assessing the thermal resource potential of solar radiation; considering the salt deposits of the gulf as heat accumulators for the development, implementation, and use of solar thermal energy technologies; and compiling a feasibility analysis of their use in engineering systems in the gulf. For development, creation, and implementation of solar thermal and electric power stations in the study area, innovative techniques that incorporate adjustments for natural and climatic conditions and atmospheric phenomena are used to assess the gross, technical, economic, and environmental potentials of the region. The solar energy potentials of a PV inverter and a solar thermal collector at the optimum tilt angle were estimated based on theoretical studies and methodological calculations, adjusted for sunshine duration; hour angle for an inclined and a normally oriented surface; movement of solar declination to an inclined surface and to the horizon; radiation scattering, albedo, angular parameters of input and solar radiation; average monthly and annual temperature of outdoor air and operation of a solar installation; specific energy parameters of a solar installation, etc. The final scientifically substantiated and systematized results can be used in the development of design estimates and feasibility studies for the creation of various solar technology complexes in the Caspian region, which will contribute to strengthening energy security, to facilitating sustainable development of energy systems using autonomous technological units powered by solar energy, to growth of production of natural chemical elements, to reducing the consumption of organic fuel, and to improving the environmental situation in the Garabogazköl area.</p>