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Designed specifically to serve as a reliable, fully integrated and optimizing link between sustainable power plants and genset power plants, DEIF’s automatic sustainable controller, ASC-4 Solar, is a renowned, market-leading solution for the industry.

Maximizing sustainable power penetration

The ASC-4 Solar will in any operation mode automatically maximize sustainable power penetration, depending on the total load demand to the hybrid without compromising constraints such as minimum genset load demand.

Minimum genset load in island operation

Minimum genset load constraint is available in the ASC-4 Solar. The constraint applies in island operation only. This constraint will cause the sustainable power penetration to decrease in case it is compromised. This is to secure a certain amount of load on the gensets, eliminating the risk of reverse power situations and impure combustion and exhaust problems.

Spinning reserve

The ASC-4 Solar offers spinning reserve support as a percentage of the produced power, as part of an existing superior system (for instance an existing PLC system) or by means of short-term cloud detection functionality, depending on your application and requirements.

Ideal for self-consumption applications

While in grid parallel mode, the ASC-4 Solar is capable of feeding surplus PV energy to the grid and generating profit in accordance with grid operator feed-in tariffs. Alternatively, the ASC-4 Solar can regulate the PV production to match the self-consumption, thereby preventing any feed-in of PV power to the grid if prohibited by grid operator regulations.

Power management applications

DEIF’s Power Management system fully integrates the sustainable power plant and the genset plant into a unity. The ASC-4 is connected to the CAN bus constituting the internal DEIF Power Management communication link. For that reason, this approach is only applicable for plants equipped with AGC-4 or AGC 200 controllers.

Stand-alone applications

In stand-alone applications, the ASC-4 knows little about the surrounding environment in which it is placed. Based on power readings and breaker positions, the ASC-4 Solar determines the power references to the sustainable power plant. This approach is applicable for integrating sustainable power in already commissioned genset plants, whether they are equipped with DEIF controllers or not. Stand-alone applications support up to 16 gensets. The ASC-4 Solar for stand-alone applications also comes in a cost-effective version without the powerful M4 power management module.

Plug’n’play HMI touch screen

For improved user-friendliness, we’ve even created a plug and play touch screen display for hybrid projects. It’ll present all relevant data to you in real time, for instance power meter and inverter readings, PV penetration/performance ratio and much, much more.

Designed specifically to serve as a reliable, fully integrated and optimizing link between sustainable power plants (fitted with for instance PV solar inverters and battery inverters) and diesel genset power plants, DEIF’s automatic sustainable controller, ASC-4, is a new, market-leading solution for the industry.


Type Item number
ASC-4 Solar 2912410250
  • Maximizing PV penetration
  • Spinning reserve demand
  • Minimum genset load requirement
  • Suitable for self-consumption and IPP applications
  • Support of SunSpec and other relevant protocols
  • Monitoring and supervision
  • Meteorological measurements
  • Simple graphical configuration
  • 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 or AGC 200 genset controllers
  • Suitable for stand-alone solutions using multi-instruments such as DEIF’s MIB or MIC

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

Hybrid Solutions

Schools hybrid microgrid showcases ease of resource management


Commissioning Guidelines
Description of Options
Designer's Reference Handbook
Other Technical Documentation

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