Batteries and VPPs to tame AI power costs
Hook
Treating AI-era power demand like it is still 2018 is the energy equivalent of filling a data center Ferrari with lawnmower fuel. The grid is revving, and if we do not get smarter about storage and flexibility, the bill shock will do the shifting for us.
The problem
AI and cloud data centers are piling into the same regions that already carry heavy load growth. Grid operators from PJM to ISO-New England are signaling a step-change in electricity use, with multiple forecasts now pointing to roughly 2-3 percent annual growth in key pockets. PJM’s 2024 long-term load forecast explicitly flags data centers as a material driver in its near-term demand outlook, particularly in the Mid-Atlantic and Appalachia, as noted in this report. New England’s 2024 CELT materials likewise show rising demand alongside a rapid influx of inverter-based resources and storage, as noted in this planning dataset. Utilities in fast-growing territories are retooling plans accordingly: Dominion Energy’s Virginia IRP details a surge in data center load in the country’s densest hub, as described in this filing, while Georgia Power has sought additional capacity to meet accelerated industrial and data center demand, as noted in this newsroom. Add in the rise of EVs and electrified industry, and the reliability and affordability questions get sharper, not softer, a trend covered widely in this analysis.
The fix
Two scalable tools can keep the grid stable and the bills sane as data center energy demand climbs: grid-scale batteries and residential virtual power plants (VPPs).
In ISO-New England, battery storage is now coming online to shave peaks, balance variable renewables, and deliver fast-response reserves. The region’s resource mix and queues show hundreds of megawatts of storage entering the market, tracked by ISO-NE and in federal generator data such as EIA-860M. These assets absorb cheap off-peak and solar-heavy hours and fire during tight evening ramps or contingency events, cutting wholesale volatility and reducing the need for expensive peaker runs.
Meanwhile, VPPs are scaling from pilot to prime time. In Texas, ERCOT’s aggregation of distributed energy resources (ADER) pilot is paving the way for residential batteries and smart devices to bid into the market, as outlined in this program. Tesla’s Texas VPP enrolls Powerwall owners to support the grid during high-demand periods and compensate households, as described in this guide. In Australia, AEMO’s VPP Demonstrations showed that fleets of home batteries can deliver frequency control and peak support with measurable reliability, as summarized in this report series.
What the evidence says
- Load growth is real and regionally concentrated. PJM’s 2024 forecast points to persistent demand increases with data centers as a named driver, per this report, while ISO-NE’s 2024 CELT outlines higher demand scenarios and a changing resource mix, per this dataset.
- Storage is scaling fast. U.S. utility-scale battery capacity is surging and expected to keep growing through 2025, helping absorb midday solar and cover evening peaks, per EIA Today in Energy and EIA-860M.
- VPPs deliver grid services. ERCOT’s ADER pilot is establishing market pathways for aggregated home batteries and smart devices to provide energy and reserves, per this ERCOT page. AEMO’s demonstrations verified VPP efficacy in frequency response and peak support, per this report series.
- More renewables mean more need for flexibility. Curtailment is rising in high-solar markets, underscoring the value of storage and VPPs to shift energy from surplus hours to peak demand, as detailed in this CAISO data.
- Policy is clearing the path. FERC Order 2222 requires markets to open to aggregated distributed energy resources, with implementation proceeding across RTOs and ISOs. Background and filings are compiled in this FERC order and various ISO/RTO dockets.
How batteries and VPPs keep costs down
- Peak shaving: Batteries and VPPs discharge when prices spike, cutting the marginal cost of serving the last megawatt. Utilities avoid pricey peaker dispatch and customers avoid peak demand charges.
- Renewable balancing: Storage soaks up cheap midday solar and overnight wind, then releases when demand rises. That reduces curtailment and improves the capacity value of renewables.
- Fast frequency response: Batteries react in milliseconds to disturbances, stabilizing the grid during contingencies that would otherwise trigger forced outages or expensive reserve deployments.
- Local reliability: Distributed fleets can target specific feeders and substations facing data center or industrial growth, deferring upgrades and smoothing interconnection timelines.
Action plan
For utilities and grid operators
- Procure targeted storage. Run locational solicitations for 2-4 hour batteries at constrained nodes to defer wires upgrades and cover evening ramps. Use performance-based contracts aligned with reliability needs.
- Open the market to VPPs. Implement Order 2222-compliant participation models and tariffs so aggregated DERs can provide energy, capacity, and ancillary services, as outlined in this order.
- Adopt dynamic rates. Roll out time-of-use and critical peak pricing, paired with managed charging and thermostat programs, to align customer behavior with grid conditions.
- Streamline interconnection. Standardize fast-track processes for storage and DERs, and enable non-wires alternatives to address data center-driven hotspots.
For data centers and businesses
- Build flexible load. Stagger AI job scheduling to non-peak windows and deploy on-site batteries to shave demand charges and provide backup.
- Contract for firmed renewables. Combine PPAs with storage or flexibility services to hedge price volatility and meet sustainability targets.
- Join demand response. Enroll controllable loads and behind-the-meter batteries in utility programs to earn revenue while reducing system stress.
- Design for grid-friendly interconnection. Coordinate early with utilities on feeder capacity and consider microgrids for high-availability sites.
For homeowners
- Enroll in a VPP. If you have a home battery, join programs like Tesla Electric in Texas or utility VPPs to earn payouts for supporting the grid, per this guide and this ERCOT pilot.
- Leverage smart rates. Shift big loads like EV charging to off-peak windows with managed charging features offered by many utilities.
- Add modular storage with rooftop solar. Even a small battery can cover evening peaks and provide resilience during storms, while participating in VPPs where available.
The bottom line
AI is not going to wait for the grid to catch up. The good news is we do not have to choose between reliability and affordability. Grid batteries in ISO-New England and beyond, plus fast-growing residential VPPs in Texas and Australia, can shave peaks, balance renewables, and keep power costs in check as data center energy demand accelerates. The playbook is clear: build flexibility, pay for performance, and let software and storage do the heavy lifting.
