By Tori Guldenstern
AI data centers are redefining how power infrastructure has to perform. Traditional facilities drew predictable, steady loads. Today’s hyperscale and AI campuses can swing hundreds of megawatts within minutes, testing grid stability and exposing how unprepared most energy systems are for volatility at this scale.
As compute demand accelerates, those swings send frequency waves through substations and transmission assets, threatening reliability across entire regions. “When you’re in the hundreds of megawatts and you’re having swings of 50% or greater, you’re seeing multi-hundred-megawatt swings,” says Ian Rock, CTO TerraFlow Energy. “The problem is that this can cause frequency undulations in the grid, which have negative effects that ripple down through the infrastructure.”
Currently Available Solutions
As data centers move toward longer-duration, grid-supportive infrastructure that responds instantly to frequency and load changes, most facilities still rely on lithium-ion battery systems and on-site generators. Both fall short when faced with the demands of hyperscale and AI-driven workloads.
Lithium-ion batteries handle short outages well but degrade quickly under constant cycling and thermal stress. In volatile data center environments, this leads to rising maintenance costs, shortened life, and higher fire-safety risk.
Generators, meanwhile, face limits on runtime, emissions compliance, and local noise ordinances. These restrictions make them unsuitable as continuous stabilizers for variable loads.
Large-scale deployments of either technology drive up maintenance and compliance costs, limiting their viability for megawatt-scale operations.
Turning Data Centers Into Grid Assets
LDUPS™ redefines how data centers interact with the grid by placing long-duration flow batteries between the grid and the facility. The system buffers grid volatility while giving data centers real flexibility and responsiveness.
“By putting a battery in place in our LDUPS™ implementation, we can make a clear separation between grid load volatility and what the grid actually sees from the battery side. If we put the battery in the middle, the grid sees the battery charging at a relatively steady state. On the other side, the data center load can be as volatile as it likes, and the battery insulates that from the grid,” says Ian Rock, CTO TerraFlow Energy.
Of LDUPS™ communication with the grid, Ian notes, “Rather than waiting for operator input, the battery reads grid frequency and automatically adjusts consumption or output within milliseconds. It can respond in both primary and fast-frequency modes.”
“If a data center is grid connected, it can become a grid asset instead of a liability,” says Jon Parrella, CEO TerraFlow Energy. “It becomes a responsive, controllable load while maintaining five nines of reliability.”
LDUPS™ turns volatility into stability, making power quality a strategic advantage instead of a constraint.
Tori Guldenstern works with TerraFlow Energy on content development, contributing to articles and communications shared across the industry.
