Solar, Storage, and Linear Generation Help Data Centers Cut Costs and Ease Grid Pressure

Data centers are the backbone of the digital economy, and this distinction comes at a steep cost. The industry’s electricity consumption is surging, utility bills are climbing, and public scrutiny over data centers’ impact on the power grid is intensifying.

Onsite clean technology solutions can help address these concerns. By pairing solar and battery energy storage with dispatchable, low-emission linear generators, data centers can deploy cost-saving strategies and decrease grid strain, leading to significant financial and reputational benefits.

Large Power Demand Drives Challenges

According to the Environmental and Energy Study Institute, there were more than 5,400 data centers in the U.S. as of March 2025. By 2030, power demand is forecasted to soar to 130 gigawatts, the equivalent of powering more than 90 million homes.

Artificial intelligence, machine learning, and streaming services are among the primary drivers of this surge. And as computing needs expand, power grid infrastructure is struggling to keep up. The result is a sector increasingly viewed by ratepayers, regulators, and the public as a strain on shared energy resources — one that drives up electricity costs for everyone.

This perception creates real regulatory and reputational risk. Communities are pushing back against new data center developments, citing concerns about grid reliability and rising utility rates. For an industry that depends on continued expansion, that resistance can slow growth and complicate site selection.

Reducing Demand With Solar-Plus-Storage

Installing solar panels with an integrated battery energy storage system (BESS) allows a data center to satisfy a significant portion of its power needs with renewable energy. Using solar energy generated on site essentially fixes the cost of electricity for the life of the system — typically 25 years or more — while shielding the business from volatile utility prices. And when solar production exceeds real-time consumption, a BESS captures the surplus for use later in the day, further reducing the facility’s reliance on grid power.

The benefit is twofold: The data center can significantly lower its energy costs while also reducing demand on the larger power grid, helping to counter the narrative that data centers are energy sinks that drive up rates for residential and commercial utility customers.

This isn’t just good optics. It’s a tangible, measurable reduction in the load placed on vulnerable utility infrastructure — transforming a data center from a pure consumer of grid electricity into a facility that actively manages its own energy footprint.

Unlocking Cost-Saving Strategies

Pairing solar with battery energy storage also opens the door to financial strategies that meaningfully lower operating costs, freeing up capital to expand infrastructure, increase server capacity, and invest in other competitive advantages.

• Energy Arbitrage: In many utility territories, electricity rates vary by time of day and grid demand. Data centers can capitalize on these fluctuations by charging batteries when rates are low and dispatching stored energy when rates are high. Over time, this buy-low, use-high approach generates significant savings.‍
• Peak Shaving: Utilities frequently charge commercial customers a premium rate based on their peak energy usage during a billing cycle. For data centers — where power-hungry cooling systems, servers, and networking equipment can create sharp demand spikes — these charges add up quickly. Battery storage can discharge during periods of high demand to flatten those peaks, reducing maximum consumption and avoiding costly demand charges without disrupting operations.
• ‍Solar Shifting: When solar panels produce more electricity than the facility is consuming, the excess is stored rather than wasted. That stored energy can then be deployed as solar production tapers off in the evening, removing the need to pull additional electricity from the grid during late-afternoon and early-evening hours.

These strategies work in concert. A well-designed system managed by an intelligent energy management platform can optimize when to store, when to discharge, and when to pull from the grid, thus maximizing savings across every billing cycle.

Additional Revenue Through Demand Response

The financial case extends beyond cost avoidance. Depending on location, data centers with battery energy storage may be eligible to participate in demand response programs, where businesses are compensated for dispatching stored energy to the grid during periods of high demand, turning a battery system into a revenue-generating asset.

State-based solar incentive programs can further lower the overall investment, reducing per-kilowatt-hour electricity costs and helping most system owners see a full return on investment typically within five to seven years.

Resilience and Solar Firming With Linear Generators

Solar and storage dramatically reduce a data center’s grid draw, but most facilities require added predictability and resilience when it comes to onsite generation.That’s where a linear generator (L-gen) comes in.

PowerFlex’s L-gen offering is built around the Mainspring Linear Generator, which converts fuel into electricity through a low-temperature, flameless reaction rather than combustion. With only two moving parts riding on a cushion of air, magnet-driven oscillators and copper coils turn linear motion directly into electricity, delivering high efficiency, ultra-low emissions, and exceptional reliability with minimal maintenance.

Crucially, linear generators make solar stronger. Operating in a load-following mode, they ramp up and down to fill in generation around solar production — “firming” intermittent solar output and offsetting up to 100% of a facility’s load in real time. The result is a cleaner, more resilient energy mix that lowers total cost of ownership, eases pressure on shared infrastructure, and strengthens an operator’s reputation as a responsible neighbor.

For data center operators, the benefits stack up quickly:

• Utility Savings: Generating power on site at a cost below utility rates lowers operating expenses and eliminates exposure to unpredictable rate increases.
• ‍Operational Resilience: With high availability, fully dispatchable output, facilities can form “islanded” microgrids that stay online through grid disruptions.
• ‍Fuel Flexibility: Instantaneous switching between any gaseous fuel without downtime offers multiple fuel redundancy options.
• ‍Low Emissions: A flameless, non-combustion reaction sharply reduces carbon and NOₓ emissions and offers a seamless path to zero-carbon fuels like hydrogen.
• ‍Speed to Power: Factory-built, modular units can be permitted and deployed in as little as 12 to 18 months, bringing additional capacity online years ahead of constrained utility interconnections.

A Smarter Energy Strategy for a Competitive Market

Currently, the majority of data center electricity comes from fossil fuels. While grid modernization is underway, it’s not happening fast enough to match the industry’s rapid expansion, creating an emissions gap that raises both reputational and regulatory risk.

For operators with net-zero or ESG targets, pairing solar-plus-storage with cleaner linear generators provides demonstrates progress toward low-carbon energy procurement while keeping facilities reliably powered. And for those focused purely on the bottom line, the combination of utility offset, arbitrage, peak shaving, dispatchable generation, and incentive programs makes the financial case compelling on its own.

The data center sector isn’t slowing down. The question is whether operators will continue absorbing rising energy costs and growing public resistance or invest in onsite clean energy that addresses both challenges simultaneously.

Get Started With PowerFlex

PowerFlex manages the full onsite clean energy project lifecycle, from site validation and development through engineering, construction, and long-term asset management. Our specialists identify and secure high-value tax credits, rebates, and other financial incentives, while our energy acceleration platform PowerFlex X™ optimizes solar production, battery dispatch, and electric vehicle charging in real time.

Ready to explore how solar, storage, and linear generators can reduce costs and strengthen your data center’s energy strategy? Contact a PowerFlex expert today to get started.