Battery alternatives for offshore data centers

Norway Converts Deep Ocean Pressure Into Electricity Using Subsea Energy Vaults Norwegian researchers have completed successful trials of a revolutionary underwater energy storage system that uses deep-sea pressure to generate power on demand — offering a clean alternative to batteries in coastal grids. Installed off the coast of Bergen, the system consists of massive hollow spheres anchored 400 meters below the surface, which can store and release energy using water and gravity alone. The process is mechanically simple but incredibly effective. When surplus wind or hydro power is available, electricity is used to pump water out of the spheres against immense ocean pressure. When energy is needed later, valves open and water rushes back in, spinning turbines to generate electricity — just like a hydro dam, but inverted and underwater. The pilot system achieved a round-trip efficiency of 80% during six months of continuous cycling. Because the surrounding water pressure is so high, the system can store large amounts of energy in a small volume — making it ideal for islands, offshore wind farms, or areas with unstable grids. Unlike lithium-ion batteries, this subsea system is made of concrete and steel, doesn’t degrade with use, and poses no fire or chemical risk. It’s also invisible — a critical feature for environmentally sensitive marine zones. Norway’s invention turns the crushing power of the deep ocean into a silent, emission-free energy reservoir — a hidden battery beneath the waves.

Between December 2023 and May 2025, the Center for Campus Fire Safety (CCFS C.) recorded 23 lithium-ion battery-related fires in data centres, with 78% occurring inside battery rooms or UPS modules. As data centres increasingly rely on lithium-ion batteries for their UPS systems, fire risks have escalated dramatically. These batteries, favored for their high energy density and efficiency, present a significant hazard when thermal runaway occurs—a self-heating chain reaction often triggered by electrical faults or physical damage. The Rising Threat of Thermal Runaway The core danger of lithium-ion batteries in data centres lies in the phenomenon known as thermal runaway. This occurs when a battery cell, subjected to electrical abuse, manufacturing defects, or mechanical damage, enters a rapid, uncontrollable self-heating state. The temperature and pressure inside the cell escalate at a dangerous pace, leading to fires or even explosions. The statistics are sobering. In 2024 alone, Fire and Rescue NSW responded to 317 lithium-ion battery fires, representing a 66% increase from the previous year. Early 2025 saw 25 such incidents in just over a month, with multiple fires occurring in a single week. These fires are not only more intense but also more persistent, often requiring specialized suppression techniques. Tragically, 2024 also marked the first two fatalities in Australia directly attributed to lithium-ion battery fires. Globally, the story is similar. A 2025 Aviva survey of 501 UK businesses found that 54% had experienced lithium-ion battery incidents, with nearly one in five reporting actual fires or explosions. The increasing frequency and severity of lithium-ion battery fires have driven the data centre industry to seek safer alternatives, with lead-acid batteries—long valued for their reliability and strong safety record—remaining a logical choice for legacy sites despite their bulk and shorter lifespan. Nickel-zinc batteries, now being deployed by companies like ZincFive, Inc., are gaining traction because they are inherently resistant to thermal runaway and offer high power density in a compact form, while organic flow batteries, such as those planned for installation by Prometheus Hyperscale and XL Batteries in Wyoming by 2027, eliminate lithium and fire risks entirely and are well-suited for hyperscale, long-duration backup. Battery Energy Storage Systems (BESS) are integrating these and other chemistries, with OEMs like Saft and HOPPECKE Batteries supporting both traditional and advanced solutions, as the sector shifts toward safer, more flexible backup power. Read more to find out: Uptime Institute

Check out the full YouTube video here: https://lnkd.in/gCXnarHR NEW: Inside the Energy Company Using Rocks & Sunlight to Fix AI's Power Problem Most announced data centers will never get built. The ones that do are running on gas generators. And the US grid has no answer for what's coming. Hannan H., CEO & Co-Founder of Exowatt, joins Sourcery for a rare facility tour of their 40,000 sq ft Miami HQ — walking us through the tech, the team, and why the AI power crisis is far worse than the headlines suggest. Exowatt has raised $140M from Andreessen Horowitz, Atomic, Felicis, Sam Altman, Leonardo DiCaprio, Starwood Capital, Thrive Capital, and more, all betting on a deceptively simple idea: concentrate sunlight with Fresnel lenses, store the heat in rocks at 1,000°C, and dispatch electricity on demand. 24 hours a day, no grid required. Their P3 system is built from sand, dirt, and steel. Like a large magnified glass and a rock. No lithium. No cobalt. No China. Target cost: 1 cent per kilowatt hour. In this episode: → Why most announced data centers are phantom projects → The real bottleneck that replaced GPUs: skilled labor → How a 200-year-old engine is at the heart of their stack → What hyperscalers actually say about sustainability (it's not pretty) → Lessons from Tesla on iteration, modularity & vertical integration → Why Miami — and why now With a 90+ GWh demand backlog and commercial deployments live in 2025, this might be the most important energy company you haven't heard of.

Google has signed a strategic commercial agreement with Energy Dome, an Italian company that developed the CO₂ Battery, a closed-loop system that stores energy by compressing carbon dioxide into a liquid, then releasing it to drive a turbine when electricity is needed. The process operates at ambient temperature and uses off-the-shelf components like steel tanks and compressors. The new kid on the block brings interesting specs to the landscape of long-duration energy storage solutions 💡 10+ hour duration (with customizable capacity) 💡 Up to 200 MWh per installation, with expandable set up 💡 ~75% envisaged efficiency, higher than many other LDES technologies 💡 Competitive levelized cost of energy The technology has already been validated through a 2.5 MW / 4 MWh pilot project in Sardinia, and Energy Dome is now moving forward with commercial-scale plants in Italy, the US, and other markets. For Google, this technology could support its goal of operating on 24/7 carbon-free energy, especially in regions with abundant renewables and high evening demand.   Importantly, Energy Dome’s solution is designed to be cost-competitive for long-duration storage: it targets a levelized cost of energy (LCOE) between $50 and $80 per MWh, significantly lower than lithium-ion systems at similar durations. Capital costs are also expected to decline over time as deployments scale.   In the Middle East, where solar potential is high but firm, long-duration storage remains a challenge, CO₂ batteries may offer a practical, cost-effective solution to balance the grids in the absence of hydro capacities. #CenterForSustainableFuture #EnergyStorage #CleanEnergy #NetZero #Sustainability #ClimateTech #EnergyTransition #Decarbonization Hani Tohme Jose Antonio Alberich Romain Debarre Mehmet Emre Cekirdekci Hussein Khalife Alisson Gazzola Pereira Paul Aldescu Kearney Middle East and Africa | Kearney

🌱 Hydrogen Fuel Cells at Data Centers: A Viable Path to Sustainable Power? ☝ The growth of global data processing, cloud computing, and AI workloads has triggered an unprecedented demand for electrical power. As hyperscale and colocation data centers continue to expand, so does the urgency to decarbonize their operations. 🧐 Traditional backup systems, mainly diesel generators, clash with the industry's sustainability goals and mounting environmental regulations. This context has fueled interest in hydrogen fuel cells, a technology long used in industrial and aerospace applications, now emerging as a potential clean-power solution for data facilities. 👉 This article explores how hydrogen fuel cells work, their use cases in data centers, the advantages and limitations of large-scale deployment, economic considerations, and future perspectives surrounding this promising yet complex technology. #hydrogen #sustainability #datacenter #datacentre

Co-locating a data-center with an average natural gas cavern "battery" is as much energy storage as the entire global battery storage capacity. 4 years ago, the US natural gas storage "battery" was 1500x bigger than the sum of all the batteries in the globe. Natural Gas Storage Caverns are a grid-scale rechargeable battery (defining "battery" as a way to store energy during off-peak times and draw it for peak load). When we talk about datacenters and reliability and co-located power generation, gas storage caverns could be an excellent ballast and load-balancing lever if the right coordination between electrical and gas grid operators can be achieved. If a datacenter (electrical load), power generation (electrical supply, gas load), AND electrical-driven compression into a cavern (gas supply, electrical load) are all co-located with a storage cavern, the ability would exist to not only provide a highly reliable power source for the datacenter, but would also have the ability to move the load to gas compression and "recharge" the gas storage "battery" if the datacenter was not drawing the electrical load. Or, put another way, if you consider the cavern+compression+powergen to be a bi-directional "battery" for a datacenter, how big of a battery would it be? The median gas storage field has a working capacity of just over 4 bcf. That's 4 trillion BTUs. Another way to look at this "battery" is that those 4 trillion BTUs are equivalent to 1.2 million Megawatt-Hours. Now, you're not going to run the storage down to zero, and you're going to have significant losses in the power generation process, but let's say for argument that you can pull half the working capacity of the storage field, and convert it to electricity at 33% efficiency. That's still 200,000 Megawatt hours of "battery" available (the largest operational battery site in the world can store 3,300 Megawatt hours). 200 Gigawatt hours of "battery" in a single gas storage facility. For comparison, the entire global capacity for battery storage is 375 Gigawatt hours. Check out the data if you want to dig deeper. Michigan leads the country with 681 bcf of storage (demonstrated max working capacity). https://lnkd.in/es6-E7bV https://lnkd.in/e6BY5j9f https://lnkd.in/eH2awVJ2