Case Study: StackTeck achieves major Global Adjustment cost reductions with Stem’s Athena energy storage

Minimizing Energy Costs from Global Adjustment with Stem’s Smart Energy Storage

StackTeck, a Brampton, Ontario–based global provider of integrated plastic tooling solutions, was facing unpredictable, ever-rising energy costs driven largely by Ontario’s Global Adjustment (GA) and the province’s peak demand hours—with roughly 60% of its facility’s electric bill tied to GA. After evaluating options beginning in 2019, StackTeck engaged Stem to deploy energy storage paired with Stem’s Athena® platform and a nearly 1 MW / 2 MWh battery system to gain control over peak-driven charges and stabilize monthly bills.

Stem’s Athena platform predicts GA coincident peaks and autonomously dispatches the 1 MW / 2 MWh energy storage to shave utility-read load during peak hours, cutting StackTeck’s demand at critical times and substantially lowering monthly electric bills. Since the system became operational in October 2021, Stem’s solution has reduced StackTeck’s grid draw during peaks, provided measurable utility bill optimization, and helped relieve grid congestion—reducing the province’s reliance on carbon-heavy peak generation.

StackTeck

Nelson Antunes

Chief Financial Officer