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Citing Geopolitical Uncertainty, IESO Lowers Long-term Demand Forecast Slightly

November 19, 2025

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ISO Still Expecting Rapid Load Growth over Next 25 Years, but Short-term Lag Expected

IESO’s Annual Planning Outlook will include high and low demand scenarios for the first time in its 2026 edition. | IESO

Nov 18, 2025
| Michael Brooks

The reference scenario in IESO’s 2026 Annual Planning Outlook indicates net annual energy demand growth of 65% by 2050, from just over 150 TWh in recent years to 250 TWh.

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Citing Geopolitical Uncertainty, IESO Lowers Long-term Demand Forecast Slightly

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