
About ESIG
Objective. Trusted. Expert-led.
Our Mission
The Energy Systems Integration Group (ESIG) is a non-profit organization that galvanizes the expertise of the technical community to support grid transformation and energy systems integration. ESIG does this by serving as a trusted and objective convener of the engineering and technical community, providing information, education and peer-to-peer networking to support total energy systems integration and operations.
ESIG’s work shapes industry practices, influences national and state policies, impacts regulations, and is featured and cited in publications throughout industry, government, and academia.





How We Work

Working Groups
Working groups provide experts and interested parties a forum for collaboration on emerging topics. Working groups assemble task forces and project teams to research and develop recommendations on specific challenges in their areas of focus.

User Groups
User groups are formed to foster community discussion and knowledge-sharing around technologies and operations of clean energy resources.

Technical & Topical Workshops
Technical workshops provide timely and broad updates on important issues while topical workshops feature in-depth presentations and discussions on areas of special focus.

Educational Webinars
Ongoing webinars provide a learning platform for industry colleagues to share the latest news and advancements on a variety of energy topics.
Our Pioneering History

1989
Established by J. Charles (Charlie) Smith, originally as the Utility Wind Interest Group and subsequently renamed the Utility Wind Integration Group (UWIG), to provide a forum for the critical analysis of wind for utility applications. UWIG quickly becomes known for its highly technical approach to knowledge sharing and problem solving.
2011
UWIG expands its focus to include solar power and distributed generation and becomes known as the Utility Variable-Generation Integration Group (UVIG).


2018
Driven by the economics and growth of renewable energy and the interdependent nature of the global energy industry, UVIG expands its focus once again and merges with the International Institute for Energy Systems Integration (iiESI) to become Energy Systems Integration Group (ESIG). The new name reflects the non-profit educational association’s support for electricity energy systems with higher levels of clean energy and emerging opportunities for coordination between electricity, natural gas, and transportation systems, and a wide range of other energy and infrastructure pathways.



