Proceedings of the International scientific and practical conference ― German Ukrainian Forum on Reconstruction and Innovation‖ (March 23-25, 2026) / Publisher website: www.naukainfo.com. – Dresden, Germany, 2026. - 135 p.

44 Modern methods open up new horizons and innovative directions for the transformation of large socio-economic systems of the energy-technological direction. This determines the relevance of building a logically justified chain of models and methods for their structural-parametric transformation. The purpose of this study is to analyze the modern world experience of innovative development of large socio-economic systems, to determine and build on this basis a logically justified chain of potentially appropriate and practically feasible models and methods for structural-parametric eco-transformation of energy systems. Based on the results of the study of modern directions, methods and models of sustainable low-carbon development of the world economy and energy, five innovative approaches (paradigms) have been identified, a brief summary of the key features and characteristics of which includes such as: Energy as a Service, Product- Service System, Service-Dominant Logic, Performance Contracting [1, pg. 87], [2, pg. 110]. [3, pg. 1309]. 1. Energy as a Service (EaaS). Core idea – provides energy solutions as a subscription or pay-per-use model rather than requiring customers to own and manage energy assets. Features: Outcomes focus – customers pay for energy performance (e.g., energy savings or uptime) rather than for equipment or energy usage directly; Flexibility – adapts to customer needs, such as clean energy, reliability, or cost savings; Third-Party ownership – providers often own, operate, and maintain energy assets like solar panels, batteries, or HVAC systems; Technology integration – advanced technologies like IoT, AI, and data analytics for optimization and monitoring; Risk transfer – shifts operational and financial risks (e.g., performance or maintenance) from the customer to the provider; Sustainability – focus on achieving carbon-neutral or energy-efficient solutions. 2. Product-Service System (PSS). Core idea – combines products and services into a single integrated offering to deliver value. Features: Value Co-Creation – emphasis on collaboration between provider and customer to tailor solutions; Shift from ownership to access – customers access the functionality of products without