Project update - Atura Power is pleased to announce that our 300-megawatt Napanee BESS Phase 2 project was conditionally awarded a contract by the Independent Electricity System Operator subject to closing conditions. We will continue the environmental assessment, finalize contract details and secure required approvals and permits before starting construction in 2027.
We appreciate the support of the Town of Greater Napanee, Indigenous communities and members of the public who engaged with Atura Power on this important project.
Project Overview
Atura Power, a subsidiary of Ontario Power Generation, is proposing to build the Napanee Battery Energy Storage System Phase 2 (Napanee BESS Phase 2), an energy storage project in the Town of Greater Napanee, Ont. The proposed project will be located north of Lake Ontario and next to the Napanee BESS Phase 1 project. Once built, Napanee BESS Phase 2 will be able to store and output up to 300 megawatts (MW) of electricity to Ontario's electricity system for up to eight hours.
Learn more about battery energy storage systems on Atura Power’s website.
Responding to Ontario’s Growing Electricity Demand
Ontario is entering an accelerated pace of electricity demand growth, primarily driven by industrial growth, energy-intensive data centres, an increasing population, and electrification. According to the latest annual forecast from the Independent Electricity System Operator (IESO), electricity demand in Ontario is expected to grow 75 per cent by 2050.
To prepare for future electricity demand and support a reliable system for Ontarians, the IESO initiated a Long-Term 2 Request for Proposals (LT2 RFP) to secure new electricity resources that could be in service by 2030.
The proposed Napanee BESS Phase 2 project will increase Ontario’s electricity storage capacity, support system reliability, and help advance Ontario’s path to a low-carbon energy future. Energy storage facilities store surplus electricity during periods of low demand, generally during the evening. This energy can then be released into the provincial electricity system when demand is high, usually during daytime hours.
Project Details
| Project Name: | Napanee Battery Energy Storage System Phase 2 |
|---|---|
| Proponent: | Napanee BESS Phase 2 Inc., an affiliate of Portlands Energy Centre L.P., doing business as Atura Power |
| Location: | Town of Greater Napanee, Ont. |
| Generating Technology: | Battery Energy Storage |
| Maximum Capacity: | Up to 300 MW |
Committed to Engagement
Atura Power is committed to engaging with Indigenous communities, municipalities, regulatory agencies, the public, and others interested in the project throughout the LT2 process and beyond.
Atura Power held a public meeting on June 26, 2025, at the South Fredericksburgh Hall (2478 County Rd. 8, Greater Napanee, Ont.) and shared information about the proposed project and answered questions.
The information shared during the meeting is found below, under the Project Documents section of this webpage.
Please use the Contact Us form to ask us questions or share comments about the company or project.
Understanding the Process
Atura Power is proposing Napanee BESS Phase 2 through the IESO LT2 procurement process. Proposals for projects in the ‘capacity’ stream are due to the IESO in December 2025.
Atura Power will complete an environmental assessment and obtain necessary permits and approvals prior to construction if awarded an LT2 contract by the IESO. Engagement with interested parties will continue through the next phase of the project.
Timeline
Below is Atura Power’s preliminary timeline for the proposed project:
Project Documents
Project documents will be posted here as they become available. Please use the Contact Us form below to let us know if you require an alternate format for any documents.
Contact Us
Comments and information regarding this project are being collected in accordance with the Freedom of Information and Protection of Privacy Act. With the exception of personal information, all comments received will become part of the project record.
