Our Company

Energy Exemplar®

Energy Exemplar® is the market leader in the technology of optimisation-based energy market modelling. Our PLEXOS® Integrated Energy Model (PLEXOS) is used by independent system operators, regulators, electric generation and transmission companies, gas producers and retailers, energy traders, regulatory and policy bodies, consultants and analysts across every region of the world for a wide range of applications from short-term analysis to long-term planning studies. PLEXOS is a truly next-generation energy market simulator with the most advanced mathematical programming engine producing robust, fully co-optimised solutions based on linear, mixed integer and quadratic and stochastic optimisation.

Driven by the frenetic pace of advancements in computing technology and mathematical algorithms, our people understand that true innovation requires a sense of urgency, creative thinking and inspired invention. We continually think of novel approaches and more realistic simulations that enhance decision making, create market opportunities that benefit us all and enable utilities and regulatory authorities to become smarter, more energy efficient and profitable.


Energy Exemplar is the leading developer of energy market simulation software with a customer base spanning the globe. The company is focused on the development, support, and application of the class-leading PLEXOS software.

  • In 1999 Glenn and Louise Drayton founded Drayton Analytics in Adelaide, Australia. With a team of experts in operations research, and economics, the company developed the initial version of PLEXOS and released it in mid-2000. With its strong co-optimisation and mathematical framework simulating energy markets could now be done with unprecedented accuracy and robustness using linear programming and integrated mid and short-term simulation phases.
  • In 2001 the company gained a significant presence in Europe. PLEXOS was adopted by the Irish SEM as the de facto ‘standard’ simulator because of its ability to reproduce the optimisation-based market clearing operation of the market, and its open, auditable solution methods.
  • In 2004 an office was opened in Sacramento, CA under the name PLEXOS Solutions. PLEXOS rapidly evolved into a leading-edge transmission model and featured in the redesign of the California power market. PLEXOS Solutions also offered a range of consulting and data services around the PLEXOS product.
  • In 2006 the company expanded to provide software and services throughout the Asia-Pacific region and into southern Africa.
  • On 29th June 2006, Energy Exemplar Pty Ltd was Registered and assumed the role and responsibilities of Drayton Analytics Pty Ltd.
  • In June 2009, Energy Exemplar opened its 2nd regional office located in London and expanded the distribution, support, implementation and consulting roles for the PLEXOS product in the European region.
  • From January 2011, Energy Exemplar offered distribution, support, implementation and consulting roles for the PLEXOS product in the South American region.
  • On the 5th August 2011, Energy Exemplar acquired PLEXOS Solutions and expanded into the US market opening its 3rd regional office located in Roseville, California.
  • On April 1 2013 the company opened its 4th regional office located in Hartford, CT to support customers in the eastern interconnected system.
  • On July 1 2013, Energy Exemplar released a significant update to the PLEXOS software, introducing a fully integrated gas-electric co-optimisation with the availability of a commercial dataset making PLEXOS a truly powerful integrated energy simulation software.
  • In August 2013, Energy Exemplar became an ISO 9001:2008 certified company.
  • On April 1 2014, Energy Exemplar opened its 5th regional office, located in Johannesburg, South Africa to support customers in the African region.
  • In January 2015, installations of PLEXOS reached the 1000 milestone making it the most widely used commercial integrated energy market software in the world.

Energy Exemplar continues to ‘push the envelope’, being first-to-market with the latest advances in mathematical programming and energy market simulation theory, as it strives to offer the most comprehensive simulation software to its customer base. Development continues to be headquartered in Adelaide, Australia, led by Glenn Drayton backed by a team with expertise in software development, operations research, economics, mathematics, statistics, and electrical engineering.

Global Users

PLEXOS is used across every region of the world by:

  • Power Generation Companies
  • Transmission System Operators
  • Independent System Operators
  • Electricity and Gas Market Operators
  • Energy Commission and Regulators
  • Energy Traders
  • Price Forecasting Agencies
  • Power Plant Manufacturers
  • Power Plant Construction Companies
  • Consultants
  • Analysts
  • Academics & Research Institutions

Join Us

Energy Exemplar works closely with a number of world-class academics and third-party suppliers, integrators, consultants and data suppliers. If you or your company are interested in collaborating with us on development of new simulation features, or in providing consulting, training, or data services please contact us.

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