



The DEIF ASC-4 Battery is a highly configurable sustainable energy storage controller that allows seamless integration of an ESS in greenfield applications with other DEIF controllers such as the AGC-4 Mk II advanced genset controller and other sustainable controllers in our ASC-4 range.
Wide range of control strategies
The ASC-4 Battery lets you store and use green power from PV panels and wind turbines. The controller handles charging and discharging as required by the operating scenario, based on state of charge control of the ESS or using Schedular-Command timers that allow you to define which sources to charge from, and when. It includes control strategies such as peak shaving, load take-over, fixed power, automatic mains failure (AMF), and mains power export (MPE), allowing it to be used for a wide range of applications. You can define and change the priority of connected power sources.
Energy source, power source, or droop mode
The ASC-4 Battery is suitable for grid-forming or grid-following applications, and it supports energy source or power source functions. It is also able to run in droop mode (acting as a virtual synchronous generator) if the ESS supports this. The ASC-4 Battery can switch operating modes very quickly as required. It supports grid/power quality support with active or reactive power, spinning reserve capability (reducing the number of gensets running), frequency and load response, and load control.
Built-in power metering
The built-in power metering feature of the ASC-4 Battery measures busbar voltage, current, and frequency before and after the breakers. Operation and mode switches can be configured to be based on these readings, for example carrying out mode switches based on voltage and frequency changes.
Full compatibility with wide range of equipment
The ASC-4 Battery can communicate with a BCU (battery control unit) or directly with a BMS (battery management system) and PCS (power control system) over Modbus, allowing it to be used with a wide range of ESSes. It is designed for full compatibility with DEIF controllers, allowing you to set up an EMS quickly and efficiently. For an updated compatibility list for the controller, see Application Notes on the Documentation tab.
M-Logic provides flexibility and customisability
The setup of the ASC-4 Battery can quickly and easily be reconfigured as needed using the user-friendly M-Logic tool (part of DEIF’s free PC utility software offering). This allows the controller to be customised to a wide range of local applications.
Emulation feature provides safe system testing
The built-in emulation feature of the ASC-4 Battery 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 system is to turn on your controller and connect communications.
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DEIF - Hybrid Solutions

Automatic Load Controller ALC-4
- Prioritised load groups
- Anticipated load-dependent start
- Integrated in power management system
- Automatic startup of extra gensets
- Avoid overload of system
- Manual or automatic control of feeders
- Easy setup via USW and intuitive to use
- Easy commissioning, prepare SW setup before commissioning, live status of feeders shown in USW
- Flexible setup of different application types
- CANbus communication, long distance communication (up to 300 m)
- Security of supply – safety based on feeder priority

Flexible PV controller ASC 150 Solar
Single controller
- Useful for brownfield applications
- Makes sure that there is a minimum genset load
- Optimises the diesel genset load for high efficiency and low carbon footprint
Power management
- Automatically maximises PV power
- Automatically Load-dependent start and stop generators
- Automatically closes and opens breakers
- Optimises the diesel genset load for high efficiency and low carbon footprint
- Balances the loads in the system
Off-grid applications
- With a genset:
The controller uses the genset power measurements to calculate the set points for the PV power.
- With storage:
The controller combines the available PV power with the charge/discharge scheme to determine the set point for the PV power.
Grid-tied applications
- Feed surplus PV energy to the grid
- Charge the energy storage system (ESS)
- Regulate PV production to match the self-consumption

Automatic sustainable controller ASC-4 Solar Single controller
- Solar integration in hybrid applications
- ASC-4 sustainable controllers connect upto 16 gensets for PV-Diesel
- Simple graphical configuration
- Maximised sustainable power penetration
- Minimum genset load constraint
- Ideal for self-consumption applications
- Highly customisable with user-friendly M-Logic tool
- Control of breaker
- Record time commissioning with DEIF Emulation
- uses and verifies the functions of the real system for test, production and design - Suitable for power management solutions fitted with AGC-4, AGC 150 or AGC 200 genset controllers
- Suitable for single controller solutions using multi-instruments such as DEIF’s MIB or MIC

Advanced graphical interface AGI 400
- Wide screen format
- True glass front
- Capacitive touch screen
- Multi-touch and Gestures
- Robust aluminium housing
- SD card slot for easy storage and updating
- USB hosts for printers, accessories, data storage and updating
- Dimmable LED backlight
- Web server for remote access from i.e. mobile devices
- 3 Ethernet ports with integrated switch
- Serial communication (RS-232, RS-422 and RS-485)
- Wide range of support for industrial protocols
- OPC UA Server and Client
- JAVA scripting
- CODESYS V3 (optional)
- Powerful ARM Cortex-A9 processor
- Plug-in module for CANbus (CANopen/J1939)
- Wide operating temperature -20°C to +60°C
- Marine certifications
- Certified for hazardous environments
- Available in 7", 10", 15" and 21" sizes