Hahn & Sohn HDE900RST3 diesel generator ComAp remote management (optional accessory)
Hahn & Sohn Diesel Generator HDE900RST3
Professional Diesel Generator for Industry and Construction
Hahn & Sohn HDE900RST3 is a powerful industrial diesel generator that reliably supplies power to construction sites, agriculture, industrial operations, and during emergency power supply. It offers single-phase and three-phase operation, robust construction, and modern technology for stable performance.

Images are for illustration purposes only and may show different models. Basic version without sockets.
Practical Control Panel
The generator is equipped with an ergonomic control panel that informs you about the generator’s status and allows easy operation.
ATS Connection Option
The ATS (Automatic Transfer Switch) unit automatically starts the generator and transfers the load when the main power source is disconnected.
ATS 100A Indoor | ATS 100A Outdoor
YANGDONG Diesel Engine
Reliable multi-cylinder diesel engines from the Chinese manufacturer Yangdong, one of the largest producers of small diesel engines.
Liquid Cooling
An efficient liquid cooling system ensures stable operation and protects the engine from excessive wear.
Pre-Start Heating
The integrated coolant preheating system maintains the optimal temperature for safe engine start even in extreme frost conditions.
Soundproof Cover
A specially designed enclosure reduces noise during operation while ensuring effective heat dissipation.
Easier Transport
The robust frame includes mounting holes for easy handling and safe securing during transport.
Protective Surface Coating
All generator enclosures are coated with anti-corrosion protection for increased durability against weather conditions.
Oil Sensor
The generator includes an oil sensor that alerts you in time when oil needs to be topped up or changed.
Safe Operation
The Hahn & Sohn HDE900RST3 is a professional generator with emission certifications.
Key Features
- Powerful Engine: 792 kW diesel engine for maximum reliability
- Long Runtime: 1200-liter fuel tank provides up to 6 hours of operation
- Stable Voltage: Automatic AVR regulator for the protection of sensitive devices
- Quiet Operation: Soundproof enclosure reduces noise and vibrations
- Single-phase and three-phase operation (400 V, 230 V)
- Electric Starter: Easy start at the push of a button
- ATS Output: Option for automatic switch-over in case of power outage (ATS sold separately)
- Safety Features: Oil sensor, emergency switch, generator protection
Why Choose Hahn & Sohn HDE900RST3?
- Professional generator for construction, industry, and backup power
- Powerful and efficient diesel engine
- Long runtime on a single refueling
- Safe voltage and stable operation thanks to AVR
- Quiet operation and durable design
🛒 Order now and ensure reliable power for your projects!
Standard Equipment
- Powder-coated steel housing
- Diesel engine
- Brushless self-excited generator
- Battery pack
- Battery charger
- Battery disconnection lever
- Standard-capacity fuel tank
- Engine and generator silent blocks
- Muffler with vibration compensator
- Main circuit breaker (generator protection)
- Terminal block (for full power output)
- Emergency switch
- Control cabinet heater with control panel
- ComAp InteliLite or ComAp InteliNano control panel
- Compatible with ATS backup system
- Basic internal lighting
- Engine block heater
📦 Delivery without unloading – the customer must arrange a crane or forklift.

Note: The unit is delivered ready for use – with oil and coolant filled, charged batteries, and tested. Before first use, it is recommended to read the manual and check fluid levels and overall condition.
Additional parameters
| Category: | Industrial power generators |
|---|---|
| Warranty: | 2 years |
| Weight: | 10100 kg |
| Maximum output: | 990 kVA / 792 kW |
| Rated power: | 900 kVA / 720 kW |
| Rated current: | 1299 A |
| Frequency: | 50 Hz |
| Nominal voltage: | 230 V / 400 V |
| Fuel tank capacity: | 1200 l |
| Operating time on a full tank at 100% load: | 6 hours |
| Fuel consumption at 100% load: | 199 l/h |
| Fuel consumption at 75% load: | 149 l/h |
| Fuel consumption at 50% load: | 99 l/h |
| Dimensions: | 5800 x 2150 x 2550 mm |
| Engine type: | Diesel |
| Engine power: | 782 kW |
| Engine speed: | 1500 rpm |
| Number and arrangement of cylinders: | 6 / in line |
| Engine fuel system: | direct injection |
| Exhaust gas flow: | 152.6 m³/min |
| Exhaust gas temperature: | 600 °C |
| Voltage regulation: | electronic - AVR |
| Voltage stability: | ± 1% |
| Oil tank capacity: | 75 l |
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