Allye Energy has introduced the MEV (MAX for EV), a battery-integrated electric vehicle charging system designed to help fleet operators install DC fast charging without requiring major electrical grid upgrades.

The U.K.-manufactured system uses repurposed electric vehicle battery packs to store electricity from an existing site connection and deliver higher-power charging when needed.

According to Allye, the system can deliver up to 400 kW of charging power to two vehicles simultaneously, even when connected to a limited electrical supply.

The MEV range starts at £70,000, with deliveries expected in the second quarter of 2027.

Battery Storage Addresses Fleet Charging Constraints

The MEV system is designed for fleet depots where available grid capacity may not support conventional DC fast-charging equipment.

Rather than relying on a high-capacity electrical connection to deliver power directly to vehicles, MEV stores electricity over time and uses its internal battery packs to provide higher charging output when vehicles are connected.

The system is available in two configurations:

• MEV200: 200 kW of DC charging power with 155 kWh of rated battery storage capacity.
• MEV300: 300 kW of DC charging power with 232 kWh of rated battery storage capacity.

The units provide 148 kWh and 222 kWh of usable storage capacity, respectively.

Both configurations can operate using electrical connections ranging from 16A single-phase to 125A three-phase. Allye recommends at least a 32A three-phase connection, equivalent to 22 kW, for a full overnight recharge.

According to the company, a MEV unit operating on a 63A connection over an eight-hour day could support seven to 10 vehicles receiving between 55 and 70 kWh each.

Allye's PackFlex technology allows battery packs of different sizes, ages and chemistries to operate within the same system using independent battery management and power controls.

The charger uses an 800V electrical architecture and supports both 400V and 800V vehicles.

"MEV is the direct result of our work on the MAX300," said Robert Carter, chief technology officer at Allye Energy. "The hard part was never the battery. It was making packs of different sizes and ages behave as one system and deliver up to 400kW of DC charging through an 800V architecture and our in-house technology stack."

Fleet Charging Without Major Grid Upgrades

Allye developed the MEV platform following deployments of its MAX battery storage systems, including a project at J&M Murdoch's refuse depot in Glasgow.

At that location, a grid upgrade had been quoted at £300,000. Instead, Allye and charging partner Chargepoly installed a MAX300 system using the depot's existing 32A, 22-kW electrical supply.

The system now supports a DC fast charger serving two electric vehicles and delivers approximately 200 kWh of energy daily, according to Allye.

The MEV platform incorporates that battery-buffered charging approach into a fixed charging unit.

Allye said the equipment can be installed using existing industrial electrical connections or hardwired into a facility. The units are also designed to be relocated if a depot moves or a property lease ends.

The company estimates that using repurposed EV batteries instead of newly manufactured cells avoids approximately 15 to 24 metric tons of CO2-equivalent emissions per MEV unit.

Operating Costs and Charging-as-a-Service Options

Allye said the MEV system is intended to reduce electricity infrastructure expenses by allowing depots to charge vehicles without increasing their grid connection capacity.

The system can recharge its batteries during lower-cost electricity periods and deliver stored energy during higher-demand periods.

Allye estimates that a MEV200 could recover its additional purchase cost compared with a conventional 200-kW charger within two to three years.

The company also projects potential savings of £50,000 to £110,000 over 10 years, excluding avoided grid upgrade costs. These estimates depend on electricity tariffs, site utilization and other operating assumptions.

In addition to outright purchase, Allye offers MEV through an EV charging-as-a-service model, with monthly pricing starting at £1,900 for the MEV200.

The subscription model is intended to allow fleets, depots and local authorities to install charging equipment without an upfront capital purchase.

"Charging as a service, a monthly fee instead of a capital bill, is how fleets, depots and local authorities get more charging for less," said Jonathan Carrier, founder and CEO of Allye Energy.

Charging Reliability and Equipment Protection

The MEV system includes several features intended to support charging availability and equipment security.

These include lighting that activates when drivers approach the charger, cameras covering charging bays and cables, and cable-cut detection.

Each battery pack includes a high-voltage isolation fuse, off-gas detection and fire barriers between battery packs. Fire suppression is available as an option.

The charger can also be equipped with AI-based bay monitoring to identify vehicles blocking charging spaces or remaining connected beyond their charging sessions.

Allye said individual battery packs can be removed for maintenance while the remaining packs continue operating.

Previous Battery Storage Deployments

Allye reported that more than 20 MAX systems using over 100 repurposed EV batteries are currently operating with customers, including JLR and Roadchef.

At Roadchef's Killington Lake motorway service area, a MAX300 has operated for more than two years using an existing electrical connection shared with other facilities.

According to Allye, the installation prevented 12 site power interruptions during its first year and generated approximately £120,000 in savings without a grid upgrade.

The company's MAX500 systems are also being used to charge electric construction equipment at the Lower Thames Crossing project, where Allye reported more than 900 charging sessions and over 126 MWh of electricity delivered.

Allye is seeking distribution partners in the U.K. and international markets to support MEV installations.

The company noted that MEV performance, energy, emissions and pricing figures remain design targets ahead of certification.