Battery Storage & the AI Grid
CDO, Star Charge Americas | Stanford PhD, Graduate School of Business
Key Quotes
"What we're seeing is a growing interest from hyperscalers in behind-the-meter storage — BESS systems that can provide peak shaving and backup power without waiting for the grid to catch up."
"Demand charges can represent thirty to forty percent of a data center's electricity bill. A BESS system can shave those peaks."
"The intelligence layer — the software that optimizes when to charge, when to discharge, when to participate in grid markets — is where the real value is created."
"Distributed storage aggregated into virtual power plants is a genuine game-changer. It democratizes access to grid services."
Topics Covered
Battery Energy Storage SystemsBESSMicrogridsAI Data Center PowerPeak Demand ManagementVirtual Power PlantsGrid ResilienceEV Charging InfrastructureStar Charge AmericasIRA Storage IncentivesERCOTCAISOBehind-the-Meter StorageFull Transcript
Welcome back to the Grid Strategy Show. I'm Scott Arfsten, and today we're sitting down with Andreas Fornwald — Chief Development Officer of Star Charge Americas, Stanford GSB PhD, and one of the most connected figures in global battery energy storage. Andreas, great to have you here at Stanford.
Scott, it's great to be here. This is a conversation I've been looking forward to. The intersection of battery storage and AI infrastructure is one of the most important topics in energy right now, and I think it's still underappreciated by most people outside the industry.
Let's start with the big picture. Battery energy storage has been growing fast — but when you look at the scale of AI data center load coming onto the grid, is BESS keeping up?
The short answer is: not yet, but the trajectory is right. The challenge is that data center load growth is happening faster than the grid can respond. Interconnection queues are backed up three to five years in most major markets. Transmission is constrained. So what we're seeing is a growing interest from hyperscalers and colocation operators in behind-the-meter storage — BESS systems that can provide peak shaving, backup power, and demand charge reduction without waiting for the grid to catch up. Star Charge is seeing this demand accelerate significantly.
Walk me through how a BESS system actually works in a data center context. What problem is it solving?
There are really three distinct value propositions. First, resilience — a BESS system can provide seamless backup power during grid outages, replacing or supplementing traditional diesel generators. For a hyperscale data center, even a millisecond of downtime is unacceptable. Second, peak demand management — utilities charge commercial customers based on their peak demand in a given month. A BESS system can shave those peaks, reducing demand charges that can represent thirty to forty percent of a data center's electricity bill. Third, grid services — in markets with the right regulatory frameworks, a BESS system can participate in frequency regulation, spinning reserves, and other ancillary services, generating revenue that offsets the capital cost.
You've worked in both European and American energy markets. How does the US compare to Europe in terms of BESS deployment and the regulatory environment?
Europe has been ahead on grid-scale storage in some respects — particularly in the UK and Germany, where frequency regulation markets are well-developed and storage can participate directly. The US market is more fragmented because of the patchwork of ISOs and RTOs, each with different market rules. ERCOT in Texas has been a leader — the combination of high renewable penetration and a competitive energy market has created strong incentives for storage. CAISO in California is another important market. But the regulatory reform needed to fully unlock storage value — particularly for behind-the-meter assets — is still incomplete in most US markets.
Star Charge is one of the largest EV charging and energy storage companies in the world. What's the connection between EV charging infrastructure and grid-scale storage?
It's a natural convergence. Both EV charging and data centers are large, controllable loads that can be managed intelligently to benefit the grid. A charging station with integrated storage can charge batteries during off-peak hours when electricity is cheap and clean, then use that stored energy to charge vehicles during peak hours — reducing grid stress and lowering costs. The same logic applies to data centers. The intelligence layer — the software that optimizes when to charge, when to discharge, when to participate in grid markets — is where the real value is created. That's a core competency for Star Charge.
What does the next five years look like for BESS in the US? Where do you see the biggest growth?
I see three major growth vectors. First, utility-scale storage paired with renewable generation — the IRA has dramatically improved the economics of standalone storage, and we're seeing a wave of projects in the pipeline. Second, behind-the-meter storage for large commercial and industrial customers — data centers, manufacturing, healthcare — who need resilience and want to manage their energy costs. Third, and this is the one I'm most excited about, distributed storage aggregated into virtual power plants. The ability to aggregate thousands of smaller BESS systems into a single dispatchable resource that can participate in wholesale markets is a genuine game-changer. It democratizes access to grid services and creates a new class of distributed energy asset.
Andreas Fornwald — CDO of Star Charge Americas, Stanford GSB PhD, and a leading voice in global battery storage. Thank you for joining us at Stanford on the Grid Strategy Show.
Thank you, Scott. The grid is the foundation of everything — and storage is what makes a clean, reliable grid possible. I'm glad we're having this conversation.
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