the project, and our current expectation is that this project will commence commercial operations in the fourth calendar quarter of 2023.
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In addition, the on-site civil construction of the 2.8 MW project located in Derby, CT is advancing. Our current expectation is that this project will also commence commercial operations in the fourth calendar quarter of 2023.
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Manufacturing Output, Capacity and Expansion: We have made progress in advancing our carbonate and solid oxide platform capacity expansion plans.
Carbonate Platform: During the six months ended April 30, 2023, we operated at an annualized production rate of approximately 33.4 MW, compared to an annualized production rate for the six months ended April 30, 2022 of 39.6 MW. This reduction in annualized production rate is primarily due to decreased staffing levels in our Torrington facility during the first half of the fiscal year. Our annualized production rate has recently increased, and we are planning to operate at a higher annualized production rate in the second half of the fiscal year in support of project backlog and service requirements.
At this time, the maximum annualized capacity (module manufacturing, final assembly, testing and conditioning) is 100 MW per year under the Torrington facilityβs current configuration when fully utilized. The Torrington facility is sized to accommodate the eventual annualized production capacity of up to 200 MW per year with additional capital investment in machinery, equipment, tooling, labor and inventory.
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The Company continues to invest in capability with the goal of reducing production bottlenecks and driving productivity, including investments in automation, laser welding, and the construction of additional integrated conditioning capacity. The Company also constructed a SureSource 1500 in Torrington during fiscal year 2022, which operates as a testing facility for qualifying new supplier components and performance testing and validation of continued platform innovations. During fiscal year 2023, the Company is investing to add engineered carbon separation capability to the onsite SureSource 1500. This product enhancement will allow potential customers to observe the operating plant and, given the targeted market of food and beverage companies, will allow for the sampling and testing of separated CO2 to verify quantity, quality or purity requirements.
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Solid Oxide Platform: During the six months ended April 30, 2023, Versa Power Systems Ltd. (βVersaβ), a subsidiary of FuelCell Energy, entered into a lease expansion, extension and amending agreement which expanded the space to be leased by Versa in Calgary, Alberta, Canada to include an additional approximately 48,000 square feet, for a total of approximately 80,000 square feet of space. The Company took possession of part of the additional space on April 1, 2023 and took possession of the rest of the additional space on June 1, 2023 after certain leasehold improvements were made to support increased manufacturing. In addition, long-lead process equipment has been ordered to facilitate the expansion of manufacturing capacity for the solid oxide platforms in Calgary. Upon the completion of the Calgary capacity expansion, the Company expects that it will be able to increase annual production capacity and that it will be capable of delivering up to 40 MWs of annualized solid oxide electrolysis cell production per year. As part of this expansion, the Company has hired and trained additional staff for a 3-shift production operation.
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During calendar year 2023, our Calgary manufacturing operation is expected to build and deliver four units: two units that will run internally for advanced testing and two first article production units for delivery externally. Of these commercial units for external delivery, one