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Automatic genset controller (ACG-4)

The automatic genset controller (AGC-4) can be used as a single genset controller, or several AGCs can be connected in a complete power management system for synchronising projects, islanded or paralleled to the mains.

The generator controller is ideal for mission-critical applications such as hospitals and data centres, and it is capable of delivering backup power in only six seconds.

System testing in a safe environment

DEIF’s emulation solution is a standard in the automatic genset controller (AGC-4) that enables you to interact with the controller in a controlled and safe environment without risking to damage any equipment. All you need to do to perform a complete test of your power management system is to turn on your controller and connect communications.

Intuitive touchscreen puts control at your fingertips

The intuitive, pre-programmed touch display keeps integration time short and makes the automatic genset controller (AGC-4) very user-friendly and will provide you with a smooth and accurate user-experience. The display can be adapted to your needs using an array of control elements, and the tablet-like functionality allows you to operate and configure your genset by swiping, tapping and scrolling. 

Emission standards and grid code requirements

The automatic genset controller (AGC-4) meets the Tier 4 Final standards, and the controller complies with the majority of requirements for parallel to grid operation, including German VDE 4110/4105, European EN50549-1/2 and United Kingdom ENA G99 standards. Both protections and grid support functions are included, giving you a “single controller fits all” solution.

Remote communication and control

The automatic genset controller (AGC-4) supports serial communication protocols including Modbus (RS-485, USB, and TCP/IP) and Profibus. This feature allows you to supervise and control your genset/plant from a remote location. 

Backup power in six seconds and ideal for mission-critical applications

With its integrated close before excitation (run-up synchronisation) feature, the automatic genset controller (AGC-4) secures backup power in impressive six seconds. Combined with the option of having hot standby controllers/dual redundancy on all positions, the AGC-4 is ideal for all types of mission-critical power applications, e.g. data centres, hospitals, airports, and fish farms.

Unique rental genset applications

The controller has been designed with ease of operation in view. The automatic genset controller AGC-4 features up to four parameter settings which is switchable with just a tap on front the touchscreen. You can easily set and lock parameters to ensure full protection of your rental equipment. AGC-4 comprises the unique feature EasyConnect meaning that the controller automatically detects and align all gensets.

Hybrid applications

AGC-4 is plug’n’play compatible with DEIF’s ASC-4 hybrid controller for easy integration of diesel genset applications into a variety of hybrid installations. The market-leading solution maximises sustainable power penetration while always securing a sufficient amount of spinning reserve in case the photovoltaic (PV) production drops.

Available standard modes:

Island mode: Power plant with synchronising generators or a stand-alone generator. Also applicable in critical power plants.

Automatic Mains Failure: Critical power/emergency standby plants, black start generator.

Fixed power: Power plant with fixed kW set point (including building load).

Peak shaving: Power plant where generator supplies peak load demand paralleled to the mains.

Load takeover: Plant mode where the load is moved from mains to a generator, for example, peak demand periods or periods with the risk of power outages.

Mains power export: Power plant with fixed kW set point (excluding building load).

Remote maintenance: Used when the generator has to supply the load while a distribution transformer is disconnected for service.

All modes are configurable, and it is possible to change the plant mode on the fly both in single and in power management applications.

Different needs – different displays

The automatic genset controller AGC-4 is available in three versions:

AGC-4 with TDU 107 Core


  • Operating temperature 0ºC to 50ºC 
  • Plastic front
  • Plastic housing
  • One ethernet port for connection to the controller
  • Tier 4 Final support with automatic jump to dedicated Tier4 page


AGC-4 with TDU 107 Extended


  • Operating temperature -20ºC to 60º C 
  • Glass front
  • Robust aluminium housing
  • 2 Ethernet ports bridging connection to the controller
  • Remote access (via VNC connection)
  • Tier 4 Final support with automatic jump to dedicated Tier4 page


AGC-4 with LCD display

AGC4 front

  • Operating temperature -20°C to 70°C
  • Pushbuttons
  • Alphanumeric display

Automatic genset controller (AGC-4) - Features

  • Up to 32 gensets in one plant
  • The intuitive, preprogrammed touch display saves you time and smoothes operation
  • Four general purpose PID regulators that control auxiliary systems
  • Synchronises up to 56 breakers in one plant
  • Multiple operating modes in one software
  • Multi-master power management
  • Load-dependent start and stop
  • Load management
  • Emulation for fast training and I/O test
  • Automatic Mains Failure sequence
  • Complies with: VDE AR-N 4110 (medium voltage, Germany), VDE AR-N 4105 (low voltage, Germany), EN 50549-1:2019 (Europe), ENA EREC G99 (United Kingdom). Option A10 required.
  • Approved by TÜV and UL
  • Tier 4 final support
  • Hot standby for full system redundancy
    – change to backup genset controller on the fly
  • Redundant CANbus for power management
  • Close Before Excitation/Run-up synchronization
    – synchronisation from 6 seconds
  • Fully compatible with AGC 150 and AGC 200 controllers
  • Suitable for hybrid power solutions fitted with ASC-4 controllers

AGC-4 & TDU 107

APR Energy builds new power plant with DEIF generator controllers

Case: Off-grid island achieves security of supply with DEIF power management

Connect multiple gensets with EasyConnect

Leading provider of fibre network puts DEIF's critical power system to the test

New backup power system provides large salmon producer power in seconds

New emergency power system at Norwegian hospital

Schools hybrid microgrid showcases ease of resource management


Commissioning Guidelines
Description of Options
言語 文書 改訂
Flag eng Option A1 Mains protection package AGC-4 4189341236 UK.pdf B
Flag deu Option A1 Netzschutzpaket AGC-4 4189341236 DE.pdf B
Flag deu Option A10 VDE AR N 4110 4105 and G99 grid protections 4189341213 DE.pdf B
Flag eng Option A10 VDE AR-N 4110/4105 and G99 grid protections 4189341213 UK.pdf B
Flag eng Option A4 Loss of mains protection package 4189340691 UK B
Flag eng Option A5 directional over-current protection 4189340692 UK B
Flag deu Option C2 Generator add-on protection package 4189340693 DE.pdf G
Flag spa Option C2 Generator add-on protection package 4189340693 ES G
Flag eng Option C2 Generator add-on protection package 4189340693 UK G
Flag deu Option D1 voltage, var, cos phi control 4189340694 DE.pdf G
Flag spa Option D1 Voltage, var, cos phi control 4189340694 ES G
Flag eng Option D1 voltage, var, cos phi control 4189340694 UK H
Flag eng Option E and F Analogue controller transducer outputs AGC-4 4189341237 UK.pdf A
Flag eng Option G3 load sharing 4189340695 UK A
Flag eng Option G4 G5 and G8 Power management AGC-4 4189341235 UK.pdf A
Flag eng Option H2 and H9 Modbus communication AGC-4 4189341180 UK.pdf C
Flag eng Option H3 Serial communication Profibus DP 4189340443 UK.pdf H
Flag spa Option H3 Serial communication Profibus DP 4189340637 ES.pdf C
Flag eng Option H5 H7 H12 H13 Engine communication AGC-4 4189341231 UK.pdf C
Flag eng Option H6 Cummins GCS communication 4189340698 UK D
Flag eng Option H8 and H12 external IO modules 4189340675 UK G
Flag deu Option M12 EA-Erweiterungskarten, 13 Binäreing, 4 Relaisausg 4189340539 DE D
Flag eng Option M12 IO extension card 13 dig inputs, 4 relay outputs 4189340699 UK A
Flag deu Option M13 EA-Erweiterungskarten, 7 Binäreing 4189340540 DE D
Flag eng Option M13 IO extension card 7 dig inputs 4189340700 UK A
Flag eng Option M14 IO extension card 4 relay outputs 4189340682 UK C
Flag deu Option M15 EA-Erweiterungskarten, 4x 4-20 mA Eing 4189340542 DE D
Flag eng Option M15 IO extension card 4 analogue inputs 4189340683 UK D
Flag eng Option M16 configurable I/O extension cards, four multi-inputs 4189340858 UK C
Flag deu Option M16 Configurable IO extension cards 4 multi-inputs 4189340858 DE.pdf C
Flag eng Option N Ethernet IP 4189340801 UK.pdf B
Flag eng Option N Modbus TCP IP 4189340701 UK E
Flag deu Option N Modbus TCP IP 4189340725 DE.pdf E
Flag eng Option T1 critical power 4189340765 UK C
Flag deu Option X Additional display and operator panel 4189340546 DE H
Flag eng Option X Additional display and operator panel 4189340702 UK E
Flag zho 选项 H2 和 H9 Modbus 通讯 AGC-4 4189341180 中文.pdf B
Flag zho 选项_A4_市电失电保护功能包_4189340691_(中文).pdf B
Flag zho 选项_A5_方向过电流_-_电流保护_4189340758_中文.pdf B
Flag zho 选项_C2_发电机扩展保护功能包_4189340693_(中文).pdf G
Flag zho 选项_D1_电压、无功、功率因数控制_4189340694_中文.pdf F
Flag zho 选项_E_和_F_模拟量输出_AGC-4_4189341237_CN.pdf A
Flag zho 选项_H3_Profibus_DP_通讯_4189340857_中文.pdf B
Flag zho 选项_H5,_H7,_H12和_H13_MTU_MDEC,_ADEC,_J1939_CANbus_发动机通讯_4189340864_中文.pdf D
Flag zho 选项_H8,_H12_外部扩展IO模块_4189340859_中文.pdf C
Flag zho 选项_M12_IO_扩展卡_13个开关量输入,_4个继电器输出_4189341134_中文.pdf A
Flag zho 选项_M13_IO扩展卡7个开关量输入_4189341135_中文.pdf A
Flag zho 选项_M14_IO扩展卡_4个继电器输出_4189341136_中文.pdf A
Flag zho 选项_M15_IO扩展卡_4个模拟量输入_4189340852_中文.pdf A
Flag zho 选项_M16_多功能输入扩展卡-_4个多功能输入_4189341073_中文.pdf A
Flag zho 选项_N_以太网通讯_4189340889_中文.pdf B
Flag zho 选项_T1_冗余_4189341095_中文.pdf A

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