Energy Systems International Limited (ESI) is a leading Clean Development Mechanism (CDM) project developer and consultant. As the international purchaser of CERs, ESI could also provide a series of advisory services of high success rate.

ESI's expertise is in optimizing all the necessary steps for taking a project from feasibility, through operations, to the marketing and sales of CERs. ESI also possesses the capability to purchase mass quantity of CERs.

As a developer, ESI maximizes the value of a CDM project by integrating all aspects of project development: feasibility, Kyoto approvals, financing, technical integration, construction, operations, and CERs sales. As a consultant, ESI can help a project developer, whose focus is on other aspects of the project (e.g. electricity generation), and needs CDM expertise.