The Energy Mix Is Changing. Here's How Facilities Should Respond.

Facilities leaders today are asked to do more than keep the lights on. They're expected to protect operations from disruption, manage rising utility costs, and make smart long-term energy decisions.

Two themes explain the urgency: gas service and electricity prices are up, outpacing broader, record-high inflation¹. When you factor in the cost of aging energy infrastructure, it becomes clear that simply staying connected to legacy systems may no longer be a viable long-term strategy. About 66% of the average gas utility bill goes toward pipeline replacement and other infrastructure projects, adding up to roughly $21 billion per year and projected to total $1.4 trillion by 2050.²

Batteries, diversified generation, and smarter energy management are quickly becoming the tools facilities use to respond. Here's what's driving that shift, and what it means for building owners.

What's Actually Powering the Grid Right Now

Before looking at solutions, it's worth understanding the problem. The US energy generation mix is in transition:

• Natural gas is still the single largest source of US electricity, accounting for roughly 41% of electricity generation in 2025.³
• Renewables — mainly solar and wind — are the fastest-growing part of the mix, accounting for roughly 24% of U.S. electricity generation in 2025. In 1990, renewable resources provided about 12% of utility-scale electricity generation in the United States, much of which was hydropower.⁴
• Coal and nuclear also make up a meaningful share, though coal power has seen a significant decline since its peak in the early 2000s.⁵

That transition brings two challenges facility leaders need to plan around:

1. Natural gas cost volatility: Because gas-fired plants still set the price on the margin much of the time, electricity costs stay closely linked to gas prices. Gas prices also swing hard with extreme weather, storage levels, and export demand. A cold winter or a supply disruption can send bills up fast, with little warning.⁶

2. Renewable intermittency: Because solar output falls at night and during cloudy periods, and wind generation declines when winds are weak, both resources can be difficult to predict and do not provide constant capacity. Traditional metrics such as capacity factor — the percentage of electricity a plant produces compared with the maximum it could produce over time — may not fully capture this variability. As renewable energy grows to supply a larger share of the grid, gaps in output can become more significant considerations for overall reliability.⁷

The result: The grid is getting cleaner, but not necessarily more predictable — at least not without help.

Four Ways Building Owners Are Preparing

Understanding the nuances of this shift is what separates a reactive energy budget from an energy resilience strategy.

1. Energy efficiency⁸: reduce exposure at the source. Lower consumption may mean less exposure to price swings in both gas and electricity. It's one of the most direct ways to blunt the impact of volatility, and efficiency upgrades tend to help pay for themselves in lower bills no matter what the market does.

2. Onsite generation⁹: produce some of your own power. Rooftop solar and other onsite generation may reduce how much energy a facility has to buy at market rates. It won't eliminate exposure to a volatile grid, but it may shrink the portion of the bill that's exposed to it.

3. Energy storage: the piece changing the landscape fastest. Batteries can store energy when it's cheap or abundant to produce and release it when grid prices spike or renewable output dips. That's an answer to both challenges above: storage helps smooth out gas-driven price volatility, and it fills the gaps left by intermittent renewables. It's why battery storage is now one of the fastest-growing categories of new grid capacity, right alongside solar and wind. Projections show as much as a 43% growth in energy storage capacity between 2024 and 2040.¹⁰

4. Flexible Load Management: allows buildings and devices automatically and continuously adjust their loads in response to live grid and utility signals. It helps address increasingly complex grid conditions, including adapting to steep rate increases and time-of-use or real-time pricing, coordinating demand growth to avoid new peaks, and relieving localized equipment overloads or circuit congestion. By shifting, shedding, or even increasing load when beneficial, flexible loads turn buildings into active, responsive grid resources.

Facilities face growing pressure from grid instability, severe weather, rising demand, and evolving regulation. A strategy built entirely around the grid may no longer offer the flexibility or security many organizations need.

A more resilient approach may blend on-site generation, storage, and intelligent energy management, helping facilities weather outages and demand spikes while keeping critical systems running.

What Batteries Actually Deliver

Battery energy storage is no longer a niche technology; it has become a practical tool for commercial, industrial, and institutional facilities. The core benefits:

The Model of the Future: Grid Plus Distributed Resources

Batteries, solar, generators, and advanced controls working alongside utility service can give facilities more control over reliability and cost, without requiring them to leave the grid entirely. For most facilities, full energy independence may not be needed, but prioritizing a smart approach with the grid can help hedge against vulnerabilities from rising energy costs and grid reliability concerns.

For facility and energy leaders, this means exploring multiple tools that each address a different part of the same underlying challenge: a generation mix that is cleaner, but less predictable than it used to be. Options include tools like energy efficiency, onsite generation, and energy storage systems.

Ready for a whole-building energy strategy that can help connect batteries, generation assets, and energy efficiency and smart building management into a single, integrated approach? Contact a Trane expert today to learn more.

This is for informational purposes only and does not constitute professional advice. Trane Technologies believes the facts and suggestions presented here to be accurate; however, final design and application decisions are your responsibility. Trane Technologies disclaims any responsibility for actions taken on the material presented.