Batteries are no longer optional infrastructure

First published on: 19/5/2026

Power Under Pressure is Zema Global’s insights series examining how structural pressure is changing the way power markets operate, and what that means for decision-making when uncertainty becomes permanent. This third article focuses on batteries as the clearest expression of how flexibility has shifted from optimization to essential infrastructure.

This article answers:

• Why intermittent power breaks down at scale when demand becomes continuous

• How batteries have become a linchpin between renewables, reliability, and risk

• Why flexibility looks different by market, and why that complexity matters 

• Where traditional assumptions about battery value and performance begin to strain 

• What energy decision‑makers need when flexibility is no longer optional 

Other articles in this series: 

• Data centers are rewriting the rules of power
• Thermal generation, rising volatility, and the strategic advantage of modeling their behavior in advanced analytics

Why intermittent power breaks at scale

The challenge facing power systems today is not renewable growth alone. It is the collision between continuous demand and time‑bound generation.

As electrification accelerates and large digital loads expand, electricity demand increasingly behaves as a 24/7 requirement. Renewable supply does not. Solar and wind remain shaped by weather and time of day. At small-scale, that variability can be managed. At system-scale, variability affects the grid as a whole, stressing prices, networks, and reliability at the same time.

As discussed earlier in the series, continuous demand is now arriving faster than infrastructure can adapt. Adding more renewable capacity does not resolve this mismatch. It amplifies volatility, congestion, and imbalance. This is the point at which flexibility stops being optional.

Batteries emerge not as optimization tools layered on top of the system, but as infrastructure required to keep it operating.

Storage as a market and risk asset

Batteries do not generate energy. They shift it in time. That means storing electricity when it is abundant and releasing it later, when it is needed. That simple fact has far‑reaching implications.

In practice, this flexibility is delivered through battery energy storage systems, or BESS, which translate the system need for flexibility into deployable assets that participate in power markets.

By absorbing energy during periods of excess and releasing it when supply is scarce, batteries sit at the intersection of markets and risk. As power systems grow more weather‑dependent and demand becomes less deferrable, batteries increasingly function as shock absorbers.

They are asked to:

• Shift energy across distorted price shapes

• Absorb volatility created by renewable intermittency and congestion

• Manage imbalance risk as supply and demand diverge in time and location

As flexibility becomes essential, the way batteries are valued and forecasted begins to matter as much as their technical capability. Volatility reveals value in the extremes rather than the average, a dynamic that increasingly shapes how flexibility must be evaluated.

The United States: flexibility pulled forward by uncertainty

In the U.S., flexibility is being deployed in anticipation of change rather than in response to saturation. Utility scale battery capacity expanded rapidly in 2025, reflecting how storage is being pulled forward as infrastructure to manage future congestion, capacity needs, and evolving market rules. At the same time, the Department of Energy estimates that data centers already account for around 4% of electricity demand, with that share expected to grow materially over this decade.

Taken together, these dynamics mean batteries are increasingly valued on forward expectations about where load shows up and how markets adapt, rather than on fully observed operating conditions.

Europe: flexibility embedded in daily operations

Across much of Europe, the role of flexibility is more immediate. Batteries are already embedded in daily market operations, responding to granular pricing and frequent intraday volatility as well as managing imbalance risk. Europe added record battery capacity again in 2025, with utility-scale systems now the dominant segment, according to SolarPower Europe.

Yet total installed storage remains far below what system studies suggest will be required by 2030. As additional assets enter the same markets, revenue streams increasingly move together, narrowing the margin for error in how flexibility is valued and forecasted.

Asia Pacific: flexibility as system infrastructure

In APAC, batteries are often deployed first and foremost as system infrastructure. Large-scale programs in markets such as China, Japan, Australia, and Singapore prioritize grid stability, resource adequacy, and renewable integration through policy-led or regulated mechanisms. The International Energy Agency notes that many of these deployments are designed to enhance system resilience rather than maximize short-term arbitrage.

In this context, battery value depends as much on regulatory durability and policy design as on market price behavior.

Across regions, the conclusion is consistent. Batteries are essential everywhere, but the conditions that create value and risk are not the same.

Batteries under pressure: The new complexity

As batteries move from edge cases to core infrastructure supporting system flexibility, the complexity surrounding their economics increases.

Revenue stacking across energy, capacity, and ancillary services introduces multi-market exposure. Weather events put the system under stress. Congestion, policy shifts, and supply chain constraints add further friction and amplify risk.

In the U.S., policy has begun to shape battery economics as much as markets. Domestic sourcing requirements under legislation such as the One Big Beautiful Bill Act have introduced new considerations around eligible equipment, manufacturing origin, and project qualification. These rules are changing procurement strategies, increasing exposure to cost variability, and extending timelines for projects that depend on specific components or suppliers.

Across markets, the result is greater uncertainty in battery costs and availability. Longer lead times, tighter margins, and shifting compliance requirements mean that flexibility cannot be assumed to arrive on schedule or at forecast prices. As batteries become core infrastructure, supply chain assumptions increasingly feed directly into valuation, contracting, and planning decisions.

From optimization to decision readiness

Value now emerges through real‑time responses to changes in prices, congestion, and market participation rules across multiple services.

This changes where and how battery decisions must be made. As these drivers move together, average‑case assumptions have become unreliable guides for valuation, planning, and risk decisions. What appears optimal under a single scenario can quickly break down due to policy shifts or changes in infrastructure.

As interactions intensify, the margin for error narrows, raising the bar for how valuation, planning, and deployment decisions are made and revisited over time.

The question for decision‑makers is no longer whether batteries and BESS add value. It is whether that value is being understood and evaluated in a way that holds up under pressure.

As a result, decisions around valuation, contracting, and deployment must account for how flexibility behaves across a range of plausible conditions rather than a single expected outcome. True resilience lies not in a single forecast, but in ensuring decisions remain defensible as assumptions change. This marks the shift from optimization to decision readiness.

The Decisioning Advantage: Seeing flexibility clearly

In today’s power markets, uncertainty is not a temporary disruption. It is a permanent condition.

Zema Global’s Decisioning Advantage enables energy leaders to make confident decisions in uncertain markets by unifying market data, forward curves, scenarios, and analytics into a single decisioning platform, so strategy keeps pace with change.  

Through probabilistic, operationally realistic modeling, Zema Global’s cQuant Analytics helps organizations evaluate how batteries perform across a range of plausible futures, quantify downside risk, and make faster, more defensible decisions when flexibility matters most.

As batteries become non-optional infrastructure, decision readiness becomes the differentiator. cQuant Analytics captures how battery performance interacts with market dynamics, policy conditions, fuel price exposure elsewhere in the portfolio, and volatility over time. By modeling outcomes across a range of plausible futures, cQuant Analytics supports ongoing valuation, planning, and risk-decisions as assumptions change and new conditions emerge. cQuant Analytics is also built with flexibility and extensibility in mind, ensuring that modeled outcomes are consistent with region-to-region differences in market structure.

Zema Global helps organizations understand how batteries and BESS perform when volatility, policy, and market conditions interact, so decisions remain defensible as assumptions change.

Ready to capture every opportunity in today’s complex energy markets? Don’t just keep up with change — get ahead of it. Talk to our experts today.

Next in the Power Under Pressure series: how planning itself must evolve when uncertainty is permanent, and why defensible decisions matter more than precise forecasts.