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Alternators and generator systems: Robust, reliable, energy-efficient

Jenoptik generators and alternators convince through their degree of efficiency, their power density, compactness, and modularity. They are ideally suited for the electric power supply of military vehicles.

Air-cooled and liquid-cooled electric generators for integration into military platforms.
Electrical alternators from Jenoptik generate power for the on-board grids of the most varied military vehicles in keeping with needs, reliably, and efficiently – ensuring mobility and operational readiness. And this regardless of whether these are small all-terrain vehicles, transport or ambulance vehicles, main battle tanks, or missile defense systems: Availability, energy-efficiency, and power density are decisive requirements for the electric power supply of these platforms.

In order to fulfill these claims in any mission scenario, Jenoptik offers a broad product portfolio of air-cooled and liquid-cooled alternators (water-cooled, oil-cooled) with power outputs between 5.6 and 28 kilowatts with a rated voltage of 28 volts. With power electronics and analog or digital voltage regulators, we complete our alternators in keeping with customer specifications to form alternator systems.

Alternators for sophisticated deployment scenarios

The new product family of air-cooled alternators of the 400 to 600 ampere power class (see product details below) addresses the increasing demand for compact, high-performance generators and has supplemented our product portfolio since 2017.

Another specialty is our Integrated Starter Generator (ISG). As a core component of the armored personnel carrier PUMA energy system, it secures the on-board mains voltage and at the same time serves as a starter for the diesel engine.

Our robust and durable alternators convince with their high power density and their modular design. These properties enable customer-specific solutions for nearly any installation space, for various engine outputs and climatic conditions. In the process it plays no role whether this involves the modernization of an existing vehicle platform or a new development.

Maximum reliability and simple maintenance contribute to low life cycle costs and optimize the economic efficiency of our field-tested alternators. You can reach our comprehensive customer support around the clock. We maintain and repair your generators, and train your employees as required.

Out alternators have proven themselves not only in many military ground vehicles like Leopard, Puma, Boxer, or Hellhound. Manufacturers of civil rail and utility vehicles like locomotives, multiple units, or buses, for which we produce on-board mains and traction alternators, also profit from our know-how.


  • Customer-specific: Compact, easy to integrate modular design, suited to nearly all individual requirements for construction space, engine power, or deployment climate.
  • Economical: Low life-cycle-costs, high energy-efficiency – you don't only save fuel.
  • High-performance: High power density and steep start-up phase.
  • Available: Robust alternators with a long service life, simple maintenance and repair, comprehensive and individual service concepts.
  • Technologically sophisticated – well-engineered: More than 45 years of experience in the areas of mechatronics, electrical power engineering, and electrical machinery.
  • Proven: Our alternators are deployed internationally in many military and commercial vehicle platforms.

Fields of application

  • Security and defense technology and engineering, system houses, and vehicle manufacturers: Components, subsystems and systems to generate power for military vehicles.
  • Military vehicle platforms: For example, all-terrain vehicles, trucks, ambulance vehicles, armored reconnaissance tanks, armored personnel carriers, infantry fighting vehicles (IFV), main battle tanks (MBT), and air defense systems.

Product details

Electrical alternators 200 ampere to 300 ampere, water-cooled

Water-cooled direct current generators 200 A – 300 A

Electric Generator Water Cooled

The water-cooled, brushless generators provide a constant power output in many different deployment environments. They are protected from dust, sand, and spray water, and function within a broad ambient temperature range. The drive options of direct drive and belt drive enable wear-free and maintenance-free use. The generators can be equipped with integrated rectifiers or voltage regulators.

Technical Specifications (Excerpt)
Power output
5.6 kW ... 8.4 kW
Rated voltage
28 V DC
Ambient temperature
-46 °C ... +100 °C
Dimensions (diameter x length)
approx. 203 mm x 360 mm
Weightapprox. 37 kg
StandardsDesign according to MIL STD 1275B, MIL STD 461E, CE102, CS114

Electrical alternators 400 ampere to 600 ampere, air-cooled

Air-cooled direct current generators 400 A – 600 A

Air-cooled electric generator for integration into military platforms.

The air-cooled generators of the 11-16 kilowatt class impress with their modular design, which can be easily adapted to individual, customer-specific requirements with regard to the rotational speed of the engine, installation space, and supply conditions. Complicated water or oil cooling isn’t necessary. Together with the robust design, this means the greatest possible reliability, durability, and low life cycle costs. Modern interface concept and innovative energy management round off the generator system. With an external digital voltage regulator, we complete the generator to form a generator system.

Technical Specifications (Excerpt)
Power output
11.2 kW ... 16.8 kW at 6,000 RPM
Rated voltage
28 V DC
Ambient temperature
-46 °C ... +93 °C
Dimensions (diameter x length)
Upon request (depending on model)
WeightUpon request (depending on model)
Installation options
Individual installation and drive concepts possible

Electrical alternators 800 ampere to 1000 ampere, spray-oil-cooled

Spray oil-cooled direct current generators 800 A – 1000 A

Electric Generator Spray Oil Cooled

The spray oil-cooled direct current generators are ideally suited for cramped, hot installation spaces. They consist of an alternating current generator with integrated rectifier and provide constant power output in many different deployment environments. The extremely resistant drive by way of a drive shaft enables low maintenance use. The generators combine with an external analog or digital voltage regulator into a generator system.

Technical Specifications (Excerpt)
Power output
22.4 kW ... 28 kW
Rated power
28 V DC
Ambient temperature
-32 °C ... +120 °C
Dimensions [diameter x length]approx. 262 mm x 342 mm
Weightapprox. 49kg
StandardsDesign according to MIL STD 1275B, MIL STD 461E, CE102, CS114

Integrated Starter Generator ISG

Integrated Starter Generator (ISG)

Jenoptik alternators and generator systems: robust, reliable, energy-efficient

The Integrated Starter Generator (ISG) is a central component of high-performance energy systems in modern military vehicles and provides stabilized high DC voltage with power outputs of 20 kW to 500 kW via external power electronics.

The water-cooled, permanent-magnet-excited flywheel alternator works with an energy efficiency of more than 95 percent. It is mounted without additional bearings on the crankshaft between the combustion engine and the transmission. It is very durable and requires no maintenance.

The ISG can function both as a generator for the on-board power supply and as a starter (electric motor) for the main engine. In connection with an electric vehicle battery, it recovers braking energy (regenerative brake) and assists or boosts the vehicle's combustion engine (silent mode operation).

Technical specifications upon request.



Hellhound Light Reconnaissance Vehicle

The Hellhound, designed from the ground up with “team and mission” as the critical performance metrics, is a 5,897 kg (6.5 ton) Light Reconnaissance Vehicle (LRV) prototype. Unveiled by Northrop Grumman at the Association of the US Army’s 2015 Annual Meeting in Washington D.C. The vehicle will compete against multiple contenders in an upcoming evaluation of next-generation vehicles by the US Army and boasts a number of unique and ground breaking capabilities. Jenoptik’s Defense and Civil Systems division teamed with Northrop Grumman on the Hellhound, providing power generation capabilities that have never before been demonstrated on such a small vehicle. This sleek, black vehicle can hold a group of six soldiers and their gear and travel in the back of a cargo helicopter.

Jenoptik Intelligent energy systems for military platforms: Customized and efficient

Able to produce enough power to run a field hospital or command center

The challenge military vehicles currently experience is delivering more on-board power; demand has grown to the point where current 28 V systems are simply inadequate. To address this situation the Hellhound incorporates a modular Jenoptik 750 V high voltage energy system which includes a 120 kW starter generator, generator control electronics, and a high power sine wave inverter. In essence, it’s a mini power plant that delivers 18 kilowatts of onboard and 100 kilowatts of exportable power. This is enough power to run a complete suite of onboard as well as external sensor, navigation, communication, and control systems and have spare capacity to power the mobile laser weapons currently under development. The future is here and Jenoptik is ready to meet the demands with robust, reliable, and unique power systems with capacity that cannot be matched by our competition

Perfect for police, border control, National Guard, and first responders for disaster relief 

Jenoptik’s mobile power system technology enables capabilities to vehicle designers that were undreamed of in the past. New opportunities in exportable power for expeditionary command posts, infrastructure, and advanced weaponry are just but a few advantages of partnering with one of the world’s premier suppliers of technology to the defense and industrial community.

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Do you have questions? Please contact us for information.

Sales military energy supply systems

+49 4103 60-5786

Sales military energy supply systems

+1 561 427 5432

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