MAX battery energy storage
Power where the grid falls short.
Flexible energy storage at the lowest system cost, built from the EV batteries already on our roads. Charge fleets at up to 1.28MW, run sites without diesel and cut energy bills, on-grid or off-grid.
Trusted on site by
The challenge
The grid can't keep up. Diesel is no answer.
Sites need more power than their connection allows, and they need it now, not in years.
Power on site for fleets and plant.
To wait for a new grid connection.
To upgrade the supply at one site.
Costly, noisy and restricted on site.
Battery as a buffer
- Charge off-peak or from solar.
- Boost peak power above your limit.
- Back up the site in under 40ms.
- Earn from grid flexibility markets.
Battery as a generator
- Charge from DC, a MAX or a generator.
- Power quietly, zero local emissions.
- Top up from a generator if needed.
- Save fuel, run hours and emissions.
Up to 1.28MW of charging. No grid upgrade.
Your fleet is ready to go electric. Your grid connection isn't. MAX stores energy from the supply you already have and releases it at high power.
On-gridBuffer your chargers
MAX charges from a small supply and runs any charger at full speed.
Case studyJ&M MurdochDC fast charging from 32A. £300k grid upgrade deferred, live in a day.
Read the case study →
Off-gridCharge standalone
Chargers built in, recharged from DC, another MAX or a generator.
Case studySiteCharge, Lower Thames CrossingFour MAX500s charge excavators, no grid. Over £30k a week saved.
Read the case study →Each DC charger has two outlets. The power quoted is the total, shared when two vehicles plug in.
See EV charging
- AC
- 11 or 22kW
- DC
- 60, 120, 240 or 400kW
Up to 400kW of DC charging from a unit that fits in a standard parking space. Run it totally off-grid, or connect it to any supply, even single-phase.
MAX300 with integrated DC charging starts at £99,000 excluding VAT, depending on specification.
Recharge in an hour
MAX300 can be specified with 125kW DC recharging, so it recharges from a public or depot DC fast charger in a little over an hour. Top up and go anywhere, with zero diesel.
Use cases
One system. Multiple ways to beat the grid.
Start with your problem. Every page shows the saving, the proof and the MAX that fits.
On and off-grid
Charge your fleet.
Skip the grid upgrade.
Depots, hubs, vans, trucks and buses
On-grid
Keep the power on.
Lose the diesel.
Estates, gardens, zoos and heritage
On-grid
Use your own power.
Cut your bill.
Commercial and industrial sites
On-grid
Stay under your limit.
Stay open.
Motorway services, hospitality and retail
On-grid
Bridge the wait for the grid.
Without diesel.
Data centres and AI compute halls
Off-grid
Power the site.
Not the diesel bill.
Construction, infrastructure and plant
Off-grid
Quiet on set.
And on the fuel bill.
Film, TV, broadcast and live events
Off-grid
Hire out hybrid power.
Burn half the fuel.
Power rental and plant hire fleets
Off-grid
Keep homes powered.
Without the diesel.
Network operators and utilitiesThe MAX range
Four systems from 328kWh to 1.5MWh.
One platform. The architecture, software, safety systems and support are common across the range, so the only decision is how much power and capacity your site needs.
MAX300
- Capacity
- 328kWh
- Continuous power
- 88, 140 or
280kW - DC charging
- up to 400kW
Under 3.5t on its trailer, towed on a standard licence.
MAX500
- Capacity
- 492kWh
- Continuous power
- 210 or
420kW - DC charging
- up to 480kW
Compact 10ft footprint, lifted into place on any site.
MAX1000
- Capacity
- 984kWh
- Continuous power
- 420 or
840kW - DC charging
- up to 1.28MW
Drop and Go from a hooklift truck in under two minutes.
MAX1500
- Capacity
- 1,476kWh
- Continuous power
- 630 or
1,260kW - DC charging
- up to 1.28MW
Our highest power, Drop and Go in a 20ft footprint.
Proven
Real sites, real savings.
Lower Thames Crossing
>£30k a weeksaved in diesel and generator costs
Roadchef
£120ksaved in year one from peak support
J&M Murdoch
£300kgrid upgrade deferred, live in a day
Collins Earthworks
£2,500 a weeksaved in diesel on electric trucks
Horizon Plant
70% less fuel£1,500 a week saved per tower crane
OnBio
£1,000 a weeksaved on power on set and location
"Class-leading product and service with lightning-fast response whenever we need them."David O'Neill, Horizon Plant
Why MAX
More than a battery in a box.
A battery-buffered charger does one job. A standalone BESS stays where it is built. MAX does both jobs and moves between them.
| Allye MAX | Standalone BESS | EV charger with battery | |
|---|---|---|---|
| Capacity | 328kWh to 1.5MWh, up to 1.26MW per unit | Sized for fixed sites | Sized to buffer one charger |
| Integrated EV charging | Up to 1.28MW DC with two outlets, plus AC | Separate chargers needed | One charger, typically about 120kW |
| On-grid and off-grid | Both, with UPS switching in under 40ms | Typically grid-tied only | Charging only |
| DC recharging | From a DC charger or another MAX, zero diesel | Not applicable | Not applicable |
| Installation | Tow, lift or drop; no pad, fencing or crane | Crane, concrete pad and fencing | Plug-in cabinet |
| Planning | MAX300 under 2m, fits a parking bay | Often needs planning | Small footprint |
| Transport | UN3536: hire users need only plate and label | Class 9 dangerous goods under ADR | Class 9 dangerous goods under ADR |
| Batteries | Automotive packs, ECE R100, 60% lower embedded CO2 | New cells, typically imported, higher embedded CO2 | New cells, higher embedded CO2 |
Competitor columns describe typical products in each category. MAX figures from Allye datasheets.
Second life
First life on the road. Next life on the grid.
MAX is built from EV battery packs that keep their original battery management and liquid cooling. Designed, engineered and assembled in our London facility.
FAQ
Questions buyers ask
Can MAX charge EVs without a grid upgrade?
Yes. On-grid, MAX charges from your existing supply and powers DC chargers at full speed: J&M Murdoch runs DC fast charging from a 32A supply and deferred a £300k upgrade. Off-grid, MAX charges vehicles directly at up to 1.28MW DC and recharges from any public or depot DC charger.
How is MAX different from a battery-buffered charger?
A buffered charger runs one charger. MAX powers several chargers or your existing ones, runs whole sites off-grid, switches between grid and battery in under 40ms, and earns from grid flexibility when it is not charging.
Can MAX replace a standby generator?
Yes. With SyncFlow, MAX transfers loads from grid to battery in under 40ms and earns from grid flexibility while it waits. Modelled on a MAX300 replacing a 200kVA standby generator, the saving is £10,900 a year, £131,000 over a 12-year battery life.
How long does it take to get a MAX on site?
12 to 14 weeks from order to power on site. Units are pre-commissioned in our factory and run in minutes: tow a MAX300, lift a MAX500, or drop a MAX1000 or MAX1500 off a hooklift truck in under two minutes.
Are second-life batteries safe?
MAX uses automotive packs certified to ECE R100 that keep their own battery management and liquid cooling. Every cell is monitored 24/7, every pack has a pyro fuse, and Stat-X aerosol suppression is available on every model. The system is CE and UKCA marked and designed to UL9540A.
Let's power your site.
Tell us about your supply, your loads and how you use power today. We'll model the savings, sizing and CO2 before you commit.
sales@allye.com+44 (0)20 805 06560