{"id":9597,"date":"2026-06-04T07:30:11","date_gmt":"2026-06-04T11:30:11","guid":{"rendered":"https:\/\/www.autonocion.com\/us\/?p=9597"},"modified":"2026-06-04T06:29:21","modified_gmt":"2026-06-04T10:29:21","slug":"air-frozen-british-company-grid-battery","status":"publish","type":"post","link":"https:\/\/www.autonocion.com\/us\/air-frozen-british-company-grid-battery\/","title":{"rendered":"Forget Lithium: a British Plant Is Banking Renewable Power as Frozen Air at 196 Below, in Tanks That Hold Their Charge for Weeks and Are Built to Last Half a Century"},"content":{"rendered":"

When people talk about storing renewable energy, they usually mean lithium. A wall of cells, a Tesla Powerwall bolted to the garage<\/a>, a field of containers humming next to a solar farm. That has been the default answer to the obvious problem with wind and solar: the sun sets, the wind drops, and the power you made at noon is no good to anyone at 8pm. But on the site of a torn-down power station outside Manchester, a British company is building a different kind of “battery,” one with no lithium, no cobalt, and no cells at all. Its working fluid is air. Frozen air.<\/p>\n

Highview Power is putting up what it bills as the UK’s first commercial-scale liquid air energy storage plant, a 50-megawatt facility that chills ordinary air to roughly minus 196 degrees Celsius (about minus 320 Fahrenheit) until it turns into a liquid, parks it in insulated tanks, and lets it boil back into gas to spin a turbine when the grid runs short. The storage capacity is 300 megawatt-hours, enough to run flat out for six hours, and the whole thing is supposed to switch on later this year. Assuming the schedule holds, which, as we’ll get to, is not a small assumption.<\/p>\n

Freezing air to 196 below is the entire trick<\/h2>\n

The physics is less exotic than it sounds, because liquefying air is something industry has done for a century. When you cool air far enough, it stops being a gas and becomes a liquid that takes up a tiny fraction of the space, which is the whole reason you can bank a useful amount of energy in a tank instead of a salt cavern. So on the charging side, Highview takes cheap surplus electricity from the grid, cleans the incoming air, then compresses and cools it until it liquefies at around minus 196 Celsius. That liquid air sits in low-pressure tanks, holding the energy for hours, days, even weeks.<\/p>\n

When the grid needs the power back, the process runs in reverse. The liquid air gets pumped up to pressure and warmed back toward ambient temperature, at which point it flashes into a gas and expands to hundreds of times its liquid volume. That rush of expanding air drives a turbine connected to a generator, and you get electricity. No combustion, no fuel, no emissions, just air going liquid and back. The turbomachinery at the heart of the Carrington plant comes from MAN Energy Solutions, named on Highview’s own project page, and the clever part the company guards is the “cold store,” a set of gravel-packed vessels that trap the cold given off during discharge and reuse it on the next charge. That recycled cold is what keeps the round-trip efficiency from being genuinely awful, which is a problem we’ll come back to.<\/p>\n

\n
\n
CAPACITY<\/div>\n
50 MW \/ 300 MWh<\/div>\n
Six hours of full-power discharge from a single plant.<\/div>\n<\/div>\n
\n
TEMPERATURE<\/div>\n
\u2212196\u00b0C<\/div>\n
Air turns liquid at minus 196 Celsius (about \u2212320\u00b0F).<\/div>\n<\/div>\n
\n
ROUND-TRIP<\/div>\n
50\u201360%<\/div>\n
Highview’s estimate. Lithium-ion returns 80\u201395%.<\/div>\n<\/div>\n
\n
FUNDING<\/div>\n
\u00a3300M<\/div>\n
Raised in 2024 for Carrington, part of a ~\u00a33bn UK program.<\/div>\n<\/div>\n
\n
JOBS<\/div>\n
700+<\/div>\n
Construction and supply-chain roles, per Highview.<\/div>\n<\/div>\n
\n
TARGET<\/div>\n
GOES LIVE<\/div>\n
H2 2026<\/div>\n
When Highview aims to switch Carrington on. Dates have moved before.<\/div>\n<\/div>\n<\/div>\n

The opening date has slipped more than once<\/h2>\n

This is the part that deserves a straight face. Highview first revealed the Carrington plan back in 2019, and the then-CEO told the trade press construction would start the following year. By 2020 the company was talking about breaking ground, with commercial operation pencilled in for 2023. That date came and went. The project got a serious reset in June 2024, when Highview raised \u00a3300 million and said construction would start immediately for operation in early 2026. When the funding landed, The Next Web noted the company appeared to have started building back in 2020<\/a> and asked what had caused the long delay.<\/p>\n

The most concrete moment so far was the formal groundbreaking ceremony in November 2025 at the Trafford Energy Park, on the footprint of the decommissioned Carrington Power Station about eight miles outside Manchester. Mayor of Greater Manchester Andy Burnham marked the start of work alongside co-founder and CEO Richard Butland and the local MP, and the operational target had quietly shifted again, this time to the second half of 2026. “This is a hugely important moment for Highview,” Butland said at the event, framing Carrington as the first in a planned UK program. Burnham’s pitch was simpler: storing renewable power “so it’s there when people need it,”<\/a> he told the ceremony, will be essential for the region.<\/p>\n

One number worth pinning down, because it moves around: that 300 MWh is enough to cover roughly 300,000 homes during the six-hour discharge window, by the figure Highview used at its 2024 funding round. The company’s current project page now puts it higher, up to 480,000, which mostly tells you how soft “homes powered” math really is. The capacity is the hard fact. The household count is a marketing flourish that depends on how you slice it.<\/p>\n

The pitch is basically everything lithium isn’t<\/h2>\n

Lithium-ion is excellent at what it does, which is firing a lot of power into the grid for short stretches, smoothing out frequency and covering a few hours of demand. Stretch that to many hours or whole days and the economics get heavy, because you are buying a lot of cells made from lithium, cobalt and nickel, all of which come with mining, supply-chain and fire-risk baggage. Liquid air sidesteps the chemistry entirely. The raw material is air, it uses no scarce metals and no water, and Highview is quoting a 50-year design life for Carrington against the slow degradation you get from batteries.<\/p>\n

The other long-duration option, pumped hydro, has been around forever and works beautifully, but it needs a mountain, a reservoir and the right geology. Liquid air needs none of that. You can drop a plant on a flat brownfield with a grid connection, which is exactly what a decommissioned power station outside Manchester is. This is the same problem that Tesla’s grid-scale battery installations<\/a> and China’s bet on storing surplus renewables as hydrogen<\/a> are all chasing from different directions, just without a single lithium cell in the building. For anyone watching the EV transition, that matters more than it looks: the power that charges your car overnight has to be banked somewhere when the sun is down, and batteries are not the only way to do it.<\/p>\n

Liquid air gives back roughly half of what you put in<\/h2>\n

Here is the catch, and it is a real one. Round-trip efficiency, the share of energy you get back after storing it, is the weak spot for this technology. Highview pegs a standalone system at 50 to 60 percent. An independent review in early 2025, covered in an explainer from Power Technology<\/a>, put liquid air somewhere in the 20 to 50 percent range and was blunt about its economics. Either way it sits well behind lithium-ion at 80 to 95 percent and pumped hydro at 65 to 85 percent. You are throwing away a meaningful chunk of energy in the round trip from power to cold liquid and back.<\/p>\n

The counter-argument is that for storage measured in hours and days rather than minutes, capital cost and where you can build matter more than squeezing out every last electron, and the efficiency climbs when a plant can scavenge waste heat or cold from a neighbor. That is a fair point. It does not change the fact that liquid air will always hand back less than a battery, so the technology has to win on cost, siting and longevity, not on efficiency. Anyone telling you otherwise is selling something.<\/p>\n

Carrington is actually the small one<\/h2>\n

The \u00a3300 million was just for the first plant. Highview is planning four more and bigger ones, a roughly \u00a33 billion program, and has now raised over \u00a3500 million in total. Two of those projects dwarf Carrington: Hunterston in Scotland, the company’s first hybrid design pairing liquid air with lithium-ion, and Killingholme in Lincolnshire, each rated at 3.2 GWh. Both have cleared the first stage of Ofgem’s new cap-and-floor “super battery” scheme, Highview confirmed<\/a>, a mechanism that guarantees long-duration storage a revenue floor while capping the upside for consumers, with a final decision expected this summer. Together with Carrington, Highview reckons the portfolio adds up to around 7 GWh.<\/p>\n

There is genuine grid logic behind the spending. National Grid’s director and chief engineer, Julian Leslie, has said Britain will need roughly 4 GW of liquid air storage in the coming decades, and the system operator NESO has flagged a 58 GWh hole in the non-battery long-duration storage the country will need to hit its 2030 clean-power targets. Right now, when there is more wind than the grid can use, operators pay wind farms to switch off, a practice called curtailment that runs into the billions a year. Storage that can soak up that surplus for later is the fix. The investor list reflects how seriously that is being taken: the round was led by the UK Infrastructure Bank, now folded into the National Wealth Fund, alongside Centrica, with Rio Tinto, Goldman Sachs, Mosaic Capital and KIRKBI, the family office behind Lego, all in the syndicate.<\/p>\n

The frozen-air idea has been kicking around since a 1977 research paper, and Highview has quietly run a small 5 MW version near Manchester since 2018, so the physics has never been the question. The question is whether a plant that gives back half its energy can pay its way against cheaper, more efficient lithium, and whether Carrington actually powers up this year after a decade of dates sliding to the right. If it does, the UK gets its first proper grid-scale battery you can build on a flat brownfield without a mountain, a mine or a single lithium cell. Get the economics right, and there is a lot more frozen air coming.<\/p>\n","protected":false},"excerpt":{"rendered":"

When people talk about storing renewable energy, they usually mean lithium. A wall of cells, a Tesla Powerwall bolted to … <\/p>\n

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