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NiSource, a U.S. utility company, has secured a long-term energy supply agreement with an Alphabet subsidiary to power a major data center in northern Indiana. The announcement also included an expanded partnership with Amazon, aimed at accelerating power delivery to its facilities while moving up bill credits for residential customers.
The deals reflect a broader trend among Big Tech companies racing to secure reliable, clean energy sources as artificial intelligence continues to drive explosive growth in data center demand. To meet this need, NiSource is leveraging its GenCo model — a dedicated supply structure that serves large commercial customers through owned generation assets and market resources, without passing additional costs to existing utility customers.
Under the GenCo framework, approximately 340 megawatts will come from a GenCo-owned generation portfolio, with up to 175 megawatts of seasonal market purchases supplementing supply as needed. NIPSCO, NiSource's Indiana utility, will also provide the necessary transmission infrastructure to support these large-scale operations. Power delivery for Alphabet is expected to begin in summer 2026.
One of the most notable aspects of the GenCo model is its consumer benefit structure. Existing ratepayers are projected to see an estimated $1.25 billion in total system-wide savings, translating to roughly $90 to $115 annually per household. NiSource CEO Lloyd Yates noted that the latest Amazon agreement builds on a previously announced $1 billion in customer savings, reinforcing the company's commitment to balancing growth with affordability.
The announcements come as energy and policy debates around data centers intensify nationwide. Maine lawmakers recently voted to pause approvals for new large data centers over concerns that surging power demand could strain regional grids and raise household electricity costs — a tension NiSource's GenCo model is specifically designed to address.
