About Us

Energy Services International (ESI) has been in operation in New Zealand as transformer oil and filtration specialists for over 25 years. The company is head quartered in Taranaki, New Zealand, and owned by Molekulis Ltd.

ESI has a long history of service to the Electrical Supply Industry and has the experience and expertise to meet customer requirements. In line with our commitment to always do more for the environment, and with the global drive for net-zero carbon emissions, we offer environment-friendly solutions.

ESI provides the following transformer oil maintenance services to Power Utility and Industrial customers in New Zealand:

  • Vacuum Filling of New Transformers
  • Vacuum Drying of Transformers
  • Recovery and Regeneration (reclamation) of used transformer oil
  • Oil Sampling & Testing
  • Supply of Regenerated Transformer Oil
  • Supply of New high-quality Transformer Oil, mineral and biodegradable, K-class ester-based.
  • Supply of portable trolley filter units
Philippe Reboul
General Manager

World Leader in Transformer Oil Filtration & Reclamation

ESI first established online Reclamation Plant and Procedures in New Zealand over 25 years ago and is still recognized as a leader in Transformer Oil Filtration and Reclamation today.

The ESI Oil Reclamation Plants are the latest in technology and of the highest performance available in New Zealand today.

ESI’s reputation for excellent Environment, Health and Safety as well as the safeguarding of Clients Assets is second to none.

Our desire is to provide our customers with a service that will not only save them and their customer's money, and extend transformer life and reliability but is also the best choice for the environment in recycling a valuable resource.

Professional, Experienced, and Competent Staff

ESI employs staff who are competent to perform their tasks, with on-the-job training being done on a continuous basis. Plant operators are qualified, and experienced and have been trained to enable them to hold substation access and work permits in New Zealand.

ESI has a long history of service to the Electrical Supply Industry and has the experience and expertise to meet customer requirements.

Committed to the Environment & Community Health

ESI is committed to protecting community health and the environment.

The fulfillment of this commitment is considered an essential ingredient for the long-term success of the company. ESI strives to conduct its business as a responsible steward of the environment, as well as safeguarding the health and well-being of our employees, the community, our customers and their stakeholders.

To ensure that ESI has the credentials and capabilities to plan, undertake and manage the transformer oil refurbishment activities with all due diligence, ESI uses the services of environmental consultants to provide strategic advice on various Environment, Health and Safety (EH&S) steps involved in successfully managing the business venture.

We work with New Zealand's leading electricity utilities and generators. We’re always interested in new projects, big or small. Please don’t hesitate to get in touch with us regarding your transformer oil requirements.

If you want to contact us about any issue please call +64 6 7648662 or send us an email. If you would like to submit a proposal for consideration simply get a quote.