Advanced battery platform built for a new generation of electrification.
Magnus is Estes' patented, scalable battery platform built around MgCarbonit, Estes' proprietary magnesium alloy, using domestically sourced, commercial-grade lithium-ion cells. Over 80% gravimetric cell-to-pack efficiency, with a safety profile and TCO economics that hold up in commercial duty cycles.
Our Product
The Magnus platform
Magnus is a fully scalable battery platform offered in all major voltage classes up to 1000 VDC. Available in up to three sizes: Magnus I, II, & III.
Magnus
LV
Low voltage auxiliary systems
48V / 100V
9 kWh
Magnus
On-highway, commercial, marine
400V / 800V
69 kWh
Magnus
+
Low voltage auxiliary systems
500V / 1000V
78 kWh
One integration. A portfolio of products.
Batteries are too big and too heavy. Estes attacks the architecture around the cell: every Magnus variant shares the same mounting, thermal, and communication interfaces, so an OEM integrates once and carries forward across voltage classes, sizes, and cell chemistries, including a future migration to Magnus Iron in 2028, without requalification or the engineering spend a battery change typically requires.
Fully Scalable
FUNCTIONAL SAFETY
ISO 26262 up to ASIL D
CYBERSECURITY
ISO 21434
COMMUNICATIONS
SAE J1939
DURABILITY
3000+ cycles
THERMAL MANAGEMENT
WEG 50/50
CHARGE TIME
80% recovery ‹ 45 min
Magnus I
Available across all major voltage classes, in three sizes. Shipping today.
Heavy-Industrial Class: 1200V / 1500V
At up to 1500V and 200+ kWh per single string, Magnus III is the building block for megawatt-hour class systems where weight, space, and uptime are non-negotiable.
Domestic from the ground up.
Estes is designing its supply chain architecture to meet Buy America/Build America requirements, Department of War non-FEOC mandates, for maximum commercial supply chain resiliency. We design here. We source here. We build here.
One integration away.
Every Magnus variant shares the same body, interfaces, and architecture. The engineering work you do today carries forward across voltage classes, form factors, and future cell chemistries. If you're evaluating a battery partner for your next platform, start here.
What makes the Magnus™ battery platform different from conventional pack architectures?
Magnus uses the same US-sourced, commercially available nickel-chemistry lithium-ion cells as conventional battery systems. The difference is everything built around them. Conventional designs spend roughly half their total weight on non-energy-storing components. Magnus eliminates that mass through a thermo-structural body manufactured from MgCarbonit™, Estes' proprietary magnesium alloy, delivering 225 Wh/kg compared to the crowded field of conventional systems at 170 to 190 Wh/kg (assuming cell equivalency). Same battery cell, radically different system.
What is the Magnus product family?
Is Magnus suitable for Class 8 truck applications?
What is on the Magnus product roadmap?
What are the first industry segments adopting the Magnus™ platform?
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