Canada

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Companies have submitted dozens of applications to the Alberta Electric System Operator (AESO) for new projects, potentially representing thousands of megawatts' worth of industrial-scale battery storage that could come online in the next few years.

Prior to the provincial government's pause on renewables, the energy-storage industry had been working with AESO on modernizing Alberta's power purchasing and distribution rules to better fit with the role that large-scale batteries and other forms of energy storage could play on the grid.

"They're a lot bigger in scale, obviously," White said of the longer-term projects, noting the company wanted to start with smaller-scale operations before taking on the risk of a larger facility.

Other countries have built much larger facilities, such as Switzerland's Nant de Drance, which is capable of putting out 900 MW of electricity at any given moment and storing 20,000 MW-hours of energy in total — the equivalent of roughly 400,000 electric-car batteries.

TransAlta aims to add 180 MW of batteries to its existing Ghost hydroelectric facility near Cochrane in a project dubbed WaterCharger that the company hopes to deploy by 2024.

One reason the Alberta government cited for its renewable-energy pause was the intermittent nature of wind and solar power, which has created concerns over grid reliability.

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