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Aries™ LFP

Scalable LFP power.

Aries I lithium iron phosphate battery pack
Aries 79 kWh

Aries LFP • 79 kWh

Lithium iron phosphate (LFP) chemisty

Aries 62 kWh

Aries LFP • 62 kWh

Lithium iron phosphate (LFP) chemisty

  • Voltage
  • Peak Power
  • Cycle Life
  • Volume
  • Volume Cell-to-Pack
  • VED
  • Mass
  • Dimensions
  • 348 V
  • 120 kW
  • 5,000 Cycles
  • 285 L
  • 76%
  • 287 Wh/L
  • 550 kg
  • 1,730 x 766 x 229 mm
  • 270 V
  • 93 kW
  • 5,000 Cycles
  • 227 L
  • 74%
  • 273 Wh/L
  • 437 kg
  • 1,399 x 766 x 229 mm
Aries I lithium iron phosphate battery pack close up

Perfect for class 3-6 trucks.

Aries LFP delivers 150 miles of range on a single charge without nickel and cobalt. Using lithium iron phosphate (LFP) chemistry and innovative design, Aries LFP offers procurement managers compact power that is safe, durable and scalable. It delivers 5,000 cycles and allows daily charging up to 100% without degradation. And Aries LFP is built with abundant raw materials, so global supply issues are unlikely to slow production.

Safer chemistry. Extreme safety testing.

Our safer LFP chemistry massively reduces the risk of thermal runaway. We also perform industry standard SAE, ISO and UN validation testing. Then we go further. We test the full pack, the subsystems and every single component against our own standards to push the battery to its limits.

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Aries LFP validation film

Safety validation testing.

SAE J1798 Electrical Performance

SAE J2380 Structural Performance Testing

ISO 16750 and IEC 60068 Environmental Performance Testing

SAE J2464 Abuse Testing 

IEC 60529 Intrusion Testing 

SAE J2721 Corrosion Resistance Testing

SAE J2288 Lifetime Durability Testing

Certification for shipping per UN 38.3 

EMC conformance to FMC1278

Already in production.

Aries LFP is produced in Michigan for ONE by Piston Automotive on a dedicated product line.

Aries I lithium iron phosphate battery assembly line at Piston Automotive
Piston Line
Piston Automotive lithium iron phosphate battery production line
Piston Line
ONE electric battery on production line at Piston Automotive facility
Piston Line Closeup

Let’s talk about your system needs.

Our 62 kWh and 79 kWh packs can be combined in many ways and configured to deliver the performance your system needs. Aries LFP provides 62 kWh to 316 kWh and beyond, and it delivers nominal voltage ranging from 270 volts to 696 volts.

With Aries LFP, you can configure packs in series and parallel. You can even connect 62 kWh and 79 kWh packs to each other. Aries LFP is crossbar-friendly and mounts easily in your chassis. So Aries LFP is ready for your truck, bus, boat, grid or any application requiring durable, safe energy. In fact, our Aries Grid energy storage system uses a combination of Aries LFP 79 kWh packs.

Aries LFP Product Configurations Lineup
  • Simply scalable.

    Scalable architecture allows for series and parallel configurations. So Aries LFP can power a wide range of applications, from trucks and boats to homes and grids.

    Video of Aries I battery pack in a bus, trailer, van and delivery truck

More miles, less space.

Our LFP chemistry makes it possible to have larger cells while taking advantage of structural housings for load transfer. With more range and greater efficiency, Aries LFP unlocks thousands of new routes for emission-free fleets.





Video of inside view of Aries I battery pack

Sustainable supply.

Nickel and cobalt are expensive, and prices can fluctuate wildly. Aries LFP uses lithium iron phosphate chemistry, so it’s safer, lower in cost and made from more abundant materials like iron.

Chart comparing cost of iron, manganese, nickel and cobalt in battery packs



Cell–to–pack energy density.

Structural Cell-to-Pack™ architecture allows 76% system-level energy density in a compact format.

ONE battery case closeup

Aries LFP is road-tested.

In partnership with Motiv, our Aries LFP pack powered a class 5 truck with a 3-ton payload 150 miles on a single charge.

Watch video

Video of Aries I battery pack
Aries I battery pack close up

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Let's talk about finding the right energy storage solution for you.