Transforming advanced materials into exceptional systems.

Estes builds Magnus, a battery platform purpose-built for the transport sectors conventional pack architecture was never designed to serve: rail, marine, aviation, and off-highway. Designed and manufactured entirely on US soil by a founding team with two decades building EV programs and factories from the inside.

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Magnus battery platform technology hero image

“Conventional battery packs got us here. They won’t get us there.”

Electrification has always been an efficiency problem, and efficiency, at its limit, is a mass problem. The bottleneck has never been the cell. It’s been everything built around it: thermal management, structural components, and pack-level hardware.

Autonomous mobility, rail, marine, aviation, on-highway and off-highway can’t absorb that waste. Conventional pack architecture is plateauing at roughly 190 Wh/kg. That’s the ceiling for the rest of the industry. The floor for Estes is 225 Wh/kg.

See How Magnus Solves It

Our Product

Magnus. 225 Wh/kg.

Magnus uses the same commercially available cells. What’s different is everything built around them. The thermo-structural body is cast from MgCarbonit, Estes’ proprietary magnesium alloy: structural, non-flammable, and a third lighter than aluminum. The result is 225 Wh/kg delivered from a platform that no conventional pack architecture can match.

Magnus battery platform scalability hero image

82%

gravimetric conversion efficiency

50%

reduction in non-cell mass

75%

fewer unique components

225

Wh/kg delivered

Explore the Technology

82%

gravimetric conversion efficiency

50%

reduction in non-cell mass

75%

fewer unique components

225

Wh/kg delivered

Explore the Technology

Materials. Manufacturing. Systems. We build them under one roof.

Thermo-Structural Body

A load-bearing component, not a container. MgCarbonit delivers structural load path, thermal management, and high-voltage compatibility in a single monocast part.

Magnesium-alloy battery component sample

Mg Alloy: MgCarbonitTM

A third lighter than aluminum. Flame retardant. 3rd party tested to FAA standards. Built for automotive scale and economics.

Manufactured in America

US soil, start to finish. No offshore steps. No foreign-controlled inputs.

Materials. Manufacturing. Systems. We build them under one roof.

Thermo-Structural Body

A load-bearing component, not a container. MgCarbonit delivers structural load path, thermal management, and high-voltage compatibility in a single monocast part.

Mg Alloy: MgCarbonitTM

A third lighter than aluminum. Flame retardant. 3rd party tested to FAA standards. Built for automotive scale and economics.

Manufactured in America

US soil, start to finish. No offshore steps. No foreign-controlled inputs.

Materials. Manufacturing. Systems. We build them under one roof.

Thermo-Structural Body

A load-bearing component, not a container. MgCarbonit delivers structural load path, thermal management, and high-voltage compatibility in a single monocast part.

Mg Alloy: MgCarbonit

A third lighter than aluminum. Flame retardant. 3rd party tested to FAA standards. Built for automotive scale and economics.

Manufactured in America

US soil, start to finish. No offshore steps. No foreign-controlled inputs.

Built for All

Off-Highway

Magnus battery pack render for off-highway vehicles, view 1

One platform. Multitude of opportunities.

Magnus addresses commercial, rail, marine, aerial and off-highway markets. All sectors where conventional pack architectures are still too big and still too heavy.

Built in America. Sovereign by design.

Raw materials in. Finished battery platform out. Every step happens in the U.S.A. using Estes proprietary materials and technologies. Magnus qualifies from the ground up for Buy America requirements, DoW non-FEoC mandates, and supply chain resilience standards.

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Photograph of raw magnesium alloy material

Photograph of magnesium alloy material in production

The founders didn’t wait for the commercial EV market to exist. They’re building it.

A load-bearing component, not a container. MgCarbonit delivers structural load path, thermal management, and high-voltage compatibility in a single monocast part.

Meet the team

Our Investors

Backed by:

Investors with deep roots in industrial energy, advanced manufacturing, and the mobility transition.

Magnus™ unlocks electrification for the toughest applications.

Estes is scaling up its manufacturing operations. The conversation starts here.

Partner with Estes

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Magnus™ unlocks electrification for the toughest applications.

Estes is scaling up its manufacturing operations. The conversation starts here.

Partner with Estes

See the Product

Magnus™ unlocks electrification for the toughest applications.

Estes is scaling up its manufacturing operations. The conversation starts here.

Partner with Estes

See the Product

Frequently asked questions.

Can’t find the answer you’re looking for? We’re here to help.

What is Estes Energy Solutions, Inc.?

Estes is a US-based advanced battery development and manufacturing company specializing in magnesium-alloy battery platforms for commercial applications – rail, marine, on and off highway. Founded in April 2024 by engineers who built EV battery factories and electrified vehicles across multiple sectors, Estes developed a thermo-structural battery architecture that delivers disruptive energy density of 225 Wh/kg using US-sourced lithium-ion battery cells that are commercially available today.

What is the Magnus™ battery platform?

Why can’t conventional pack designs serve rail, marine, aviation, and off-highway?

What sectors does Estes serve?

What is Estes’ current development status?