Axle Energy Secures US$25m for Smarter UK Energy Power Grids

Network-based energy solutions could help address electricity demand without the construction of new generation facilities.

The approach involves coordinating existing household devices to balance power supply across the grid, reducing carbon emissions and making more efficient use of resources already installed in homes and businesses.

Building energy infrastructure requires substantial capital investment and generates significant environmental impact during construction.

Nuclear power station Hinkley Point C has been under construction in the UK since 2017 and could cost tens of billions by its expected completion in 2030.

How virtual networks function

According to NESO, the UK's national energy system operator, grid upgrades could require around US$119bn.

These infrastructure projects also involve extensive material use, land disruption and years of carbon-intensive construction activity before they begin generating clean power.

Virtual power plants offer an alternative method for managing electricity resources whilst avoiding the environmental costs of new construction.

These systems aggregate decentralised energy assets already installed in homes and businesses, maximising the utility of existing infrastructure rather than requiring additional manufacturing and installation.

VPPs connect devices such as EV chargers, home batteries and solar panels through software platforms.

The technology allows these distributed resources to operate collectively, creating flexible capacity that could respond to supply and demand fluctuations.

This coordination happens in real-time, with software algorithms optimising when devices charge, discharge or adjust their consumption based on grid conditions.

Axle Energy operates one such network in the UK. The London-based company coordinates more than 300,000 connected assets representing more than 2GW of flexible capacity.

According to the National Grid, UK electricity demand averaged 30.7GW over the past year.

The scale of Axle's network demonstrates how aggregating household devices can create meaningful grid-level capacity.

The firm raised US$25m in a funding round led by Energize Capital.

Axle compares its VPP capacity to the output of a single nuclear power station, achieved by coordinating devices that consumers have already purchased for their own use.

Coordinating distributed assets

During periods of high energy consumption, VPPs can draw power from networked devices to meet demand.

This could involve discharging home batteries or adjusting smart thermostats in ways that homeowners may not notice.

The system prioritises user comfort and convenience whilst making small adjustments that collectively create substantial grid benefits.

Participants in Axle's network receive payment for their involvement, averaging around £10 (US$13.44) monthly.

According to the company, participants collectively earned millions of pounds last year.

This compensation model creates financial incentives for sustainable behaviour whilst helping to offset the initial cost of smart energy devices.

Karl Bach is the Chief Executive Officer and Co-Founder of Axle Energy.

"Millions of EV chargers, home batteries and heat pumps already contain flexible capacity, but most of it sits unused," he says.

"Virtual power plants unlock that capacity, allowing those devices to support the grid when demand is highest and reduce exposure to volatile fossil-fuel markets."

Karl adds that the model creates value throughout the energy system. "That creates value across the whole energy system. It lowers the cost of balancing the grid, rewards consumers for participating and makes better use of infrastructure that already exists."

The environmental benefits extend beyond avoiding new construction.

By reducing peak demand, VPPs decrease the need to activate gas peaking plants, which are among the most carbon-intensive forms of electricity generation.

These plants typically operate only during periods of highest demand, making them particularly inefficient and polluting.

Expansion plans and market potential

The US$25m funding will support Axle's expansion across the UK and into international markets.

The company plans to develop partnerships with vehicle manufacturers, utilities and fleet operators.

These partnerships could accelerate adoption by integrating VPP capabilities directly into new devices at the point of manufacture.

According to Axle, there are 75 million eligible energy assets across Europe and the US.

These devices could represent around 375GW of potential capacity, though achieving this would require adoption rates far beyond current levels.

The growing penetration of electric vehicles and home battery systems suggests this potential could become increasingly accessible as more households adopt smart energy technology.

The business model addresses challenges familiar to grid operators globally.

Electrification and data centre growth could push electricity demand beyond the capacity many power systems were designed to handle.

Climate goals are driving the replacement of gas boilers with heat pumps and petrol vehicles with EVs, creating new patterns of electricity consumption that existing infrastructure struggles to accommodate.

Meanwhile, generation increasingly comes from variable renewable sources such as wind and solar.

These sources do not produce power on demand in the manner of gas or coal plants.

This intermittency creates periods when renewable generation exceeds demand and other times when it falls short, requiring flexible solutions to maintain grid stability without resorting to fossil fuel backup generation.

Flexibility as infrastructure alternative

Karl argues that flexibility could provide faster solutions than building new infrastructure.

"Virtual power plants unlock capacity from infrastructure that already exists, bringing flexible capacity online in weeks rather than years and reducing the need to rely on expensive fossil-fuel generation when demand spikes," he explains.

The approach could also affect energy security. Karl believes these solutions may improve resilience following disruptions such as the energy crisis linked to conflict in the Middle East.

Distributed energy resources create a more resilient grid less vulnerable to single points of failure or supply chain disruptions.

"Energy security is no longer just about where our energy comes from," says Karl.

"Recent geopolitical events have highlighted the risks of relying on international commodity markets, while new generation and grid infrastructure can take years to build."

This intermittency creates periods when renewable generation exceeds demand and other times when it falls short, requiring flexible solutions to maintain grid stability without resorting to fossil fuel backup generation.

Flexibility as infrastructure alternative

Karl argues that flexibility could provide faster solutions than building new infrastructure.

"Virtual power plants unlock capacity from infrastructure that already exists, bringing flexible capacity online in weeks rather than years and reducing the need to rely on expensive fossil-fuel generation when demand spikes," he explains.

The approach could also affect energy security. Karl believes these solutions may improve resilience following disruptions such as the energy crisis linked to conflict in the Middle East.

Distributed energy resources create a more resilient grid less vulnerable to single points of failure or supply chain disruptions.

"Energy security is no longer just about where our energy comes from," says Karl.

"Recent geopolitical events have highlighted the risks of relying on international commodity markets, while new generation and grid infrastructure can take years to build."

Investor perspectives on VPP technology

Tyler Lancaster is a Partner at Energize Capital, which led the funding round.

The firm has monitored the VPP sector for years before selecting Axle.

"As energy software investors, we have researched the VPP market for a decade, watching for the right team to scale this technology," he says.

"Axle brings the most comprehensive vision, experienced and agile team and customer-aligned, scalable business model we've seen."

Tyler notes that grid strain from AI power demand presents opportunities for VPP technology: "As US and European markets face a watershed moment for grid strain due to AI power demand, we believe Axle can be a blueprint for what can become a global solution."

Accel participated in the investment round.

Zhenya Loginov is a Partner at the firm.

"We believe flexibility will become one of the most important layers of the modern energy stack," he explains.

"Karl, Archy and the Axle team have built an impressive platform that helps energy companies unlock and monetize flexibility from assets that already exist."

Zhenya references Axle's current capacity.

"With more than 300,000 connected devices and more than 2GW of capacity already under management, they have established themselves as one of the leaders in this category and we're excited to continue supporting their growth."

The flexibility market landscape

Axle operates within a competitive field. Grid flexibility and demand response have attracted investment globally as operators seek alternatives to peaking plants.

The technology represents a convergence of renewable energy adoption, smart device proliferation and software sophistication, creating new possibilities for grid management that were not feasible a decade ago.

Karl sees VPPs playing a role in decarbonisation, affordability and energy security. "Virtual power plants will play an increasingly important role alongside traditional infrastructure, helping to create a more connected and flexible grid," he suggests.

The growth of smart energy devices could expand available flexible capacity.

"As more people adopt EVs, home batteries, heat pumps and other smart energy devices, the amount of flexible capacity available will continue to grow," Karl says.

He cites the potential scale across two continents. "We estimate there are around 75 million eligible energy assets across Europe and the US, representing approximately 375GW of potential capacity."

"As electricity demand continues to rise with AI and electrification, virtual power plants could help modern grids make better use of the infrastructure that already exists and reduce the need to build expensive new capacity," Karl says.