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Excelergy Corporation
www.excelergy.com

TORONTO, ONTARIO CANADA and LEXINGTON, MA., June 4, 2001 - Excelergy Corporation, provider of the world's most advanced software products and technologies for managing inter-company collaboration in restructuring markets, has signed an agreement to provide Toronto Hydro-Electric System Limited with its Excelergy eXACT* for Trading Partner Management software product.  Toronto Hydro-Electric System Ltd. serves more than 650,000 customers and distributes approximately 25 percent of Ontario's electricity.

"The opening of the Ontario market provided us the opportunity to implement software to manage our relationships with all the different companies who'll be sharing the same customer," said Connie Woo, chief information officer of parent company Toronto Hydro Corporation. "We chose Excelergy because they have a proven record of installing systems
that minimize business risk and lower overall IT costs."

Toronto Hydro-Electric System Ltd. is installing Excelergy's software to extend the functionality of the utility's existing customer information system, SCT Banner*. Excelergy eXACT for Trading Partner Management will now serve as the primary gateway for all data transactions with the growing number of businesses preparing to operate in the restructuring
Ontario electricity market, scheduled to open to competition in 2002.

The XML-based product will translate, validate and securely transmit customer data between Toronto Hydro-Electric System Ltd. and its trading partners through Ontario's electronic transaction clearinghouse hub.  Named EBT Express (for Electronic Business Transactions), the hub will allow Ontario's approximately 90 regulated distribution companies and the expected 25 or more new energy service providers to communicate data with each other electronically in order to attract and serve Ontario's four million energy customers. Excelergy eXACT also was used as the technology backbone behind EBT Express, which was formed in October 2000.

"The high performance object-based technology at the heart of Excelergy's products gives us a unique advantage over competing offerings," said Bill Mahoney, Excelergy president and chief executive officer. "It allows our clients to automatically manage their most critical intermediary relationships through highly accurate shared business processes. This translates directly into increased revenue and cash flow with lower overall costs and risks."

About Toronto Hydro-Electric System Limited
Incorporated in 1999, Toronto Hydro-Electric System Limited supplies electricity to more than 650,000 business and residential customers in the Province of Ontario. Owned by the City of Toronto, Toronto Hydro-Electric is the regulated 'wires' affiliate of Toronto Hydro Corporation and is the second largest municipal distribution utility in North America. More information is available at www.torontohydro.com

About Excelergy
Excelergy delivers the world's most advanced software products and technologies for inter-company collaboration between businesses operating in restructuring markets, such as the global energy and utility industry.  Excelergy's unique suite of object-based, XML-enabled products includes Excelergy eXACT for automating collaboration among businesses and Excelergy Advanced Business Package for managing complex business units producing multiple revenue streams. Excelergy's North American headquarters are located in Lexington, MA, with its European headquarters located in Bristol, England. More information is available at www.excelergy.com.

About EBT Express
EBT Express was created in response to the Ontario Energy Board's mandate that all players in the restructuring Ontario energy market adhere to electronic business transaction (EBT) standards to securely communicate customer data once customer choice begins. EBT Express will provide centralized electronic data management and transaction services to local distribution companies (LDCs) and energy service providers (ESPs) who'll have to collaborate to serve individual customers. Powered by leading-edge technology provided by Excelergy Corporation, EBT Express is a joint venture of Toronto Hydro Corporation and Ontario Power Generation and is the first of its kind in North America. More information is available at www.ebtexpress.com.

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