The development of solar generation is an integral part of evaluating renewable “green” energy in accordance with the concept of sustainable development. This study focuses on the specifics of the implementation of solar energy in the context of the USA, the EU and China, taken as an object in connection with the specifics of the geographical-territorial and climatic-natural situation. The originality of the research lies in the approach of modelling the implementation of solar power generation with consideration to the main economic, technological, and resource factors. This study aims to assess trends in the development and implementation of regional solar power generation. Solar energy development is performed exclusively at the expense of private investment and state support is minimal. Therefore, the power of installed solar power plants relative to the amount of invested investments shows a high correlation. From the perspective of economic activity, solar energy in the analyzed regions is used by households in small amounts. The highest use of solar energy by households is in the USA, where this indicator is 8.3%, and the lowest is in China (0.13%). The analysis indicates that currently, solar energy is not a priority for developing the energy sector but is only a supplement. Further solar energy development is possible owing to technological innovations that will increase the efficiency of solar radiation use. The analysis also revealed the conclusion that the most powerful use of solar energy appears in China, with a figure of 19.6%, while the US has only 4.04% and the EU has almost 9%. According to the criterion of economic and technological influence on solar energy development, China occupies a leading position (9.89%), whereas the EU has only 0.03%. Thus, solar energy is currently not an attractive area for business and needs to prioritize the development of the EU economy, which is confirmed by insignificant investment flows compared to China and the USA.