By J.P. Antonacci, Local Journalism Initiative Reporter, The Hamilton Spectator Last year’s sweltering summer strained the power grid as Ontarians struggled to keep cool. But the province had a powerful ace up its sleeve. Stored inside 278 giant lithium-ion batteries — each the size of a tractor-trailer — in rural Haldimand County was enough energy to instantly power tens of thousands of homes when temperature spiked and electricity demand surged. “Some of those really hot days we had this past summer, Oneida was key to keeping the lights on,” said Scott Matthews, vice-president of projects with energy storage developer NRStor Inc., a partner in the Oneida Energy Storage Project along with majority owner Northland Power, Aecon, Six Nations of the Grand River Development Corporation and the Mississaugas of the Credit…
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