Across European industrial sectors, maintaining operational continuity amid increasing grid instability has become a critical business imperative. Transient voltage fluctuations and momentary outages now directly threaten automated production lines, climate-controlled logistics, and agricultural processing, where even brief instability can disrupt operational integrity and generate substantial financial impact. Dunext's liquid-cooled PowerHill confronts this challenge directly through its advanced sub-20ms grid transition technology, establishing new benchmarks for power reliability in demanding commercial and industrial environments.

How the automatic transfer works

The system's exceptional performance stems from a sophisticated integration of monitoring, switching, and control technologies that operate in precise coordination.  When grid power failure occurs, the Static Transfer Switch (STS) immediately detects the fault and achieves physical isolation from the public grid through thyristor operation. Concurrently, the Power Conversion System (PCS) is commanded to rapidly enter off-grid mode, maintaining voltage and frequency within critical tolerances for facility loads.

Upon grid restoration, the STS monitors key parameters during a 2-3 minute observation window. After confirming stable operation within specifications, it signals the PCS to synchronize with the grid. The STS then reactivates its thyristors, achieving seamless reconnection without load disruption.

Five Technical Pillars of Millisecond-Level Switching

The realization of this intelligent switching logic, while maintaining reliability in complex industrial environments, relies on the deep integration of five core technologies:

1.Advanced PCS Control Algorithm
The system's "brain"-the PCS, with its core algorithm, can complete grid status assessment and mode switching decisions at the microsecond level, establishing the speed foundation for the entire response chain.

2.Instant Off-grid Voltage Establishment
During the transition, the PCS creates a stable, clean independent voltage source simultaneously with grid disconnection, eliminating any perceptible power quality deviation for connected equipment.

3.Ultra-Fast Physical Isolation
The thyristor-based STS performs physical isolation with electronic-level speed, eliminating mechanical delay and ensuring consistent millisecond-scale performance.

4.Secure Communication Protocol
A dedicated CAN bus architecture with magnetic ring filtering maintains flawless signal integrity between PCS and STS components, preventing electromagnetic interference from compromising transition timing.

5.Coordinated System Control

Unified control logic synchronizes all components through optimized operational sequencing, treating the PCS and STS as a cohesive entity to minimize transitional latency while maintaining system-wide operational harmony.

Transforming Energy Infrastructure Resilience

Based on these five technical pillars enabling sub-20ms seamless switching, Dunext liquid-cooled PowerHill provides a solution combining immediate protection and long-term value for addressing European grid fluctuations. The system not only effectively prevents grid failures from impacting commercial and industrial operations through ultra-fast switching, but also transforms the role of energy storage from passive backup to an active asset ensuring production continuity and enabling energy participation. Particularly, the liquid-cooled PowerHill is already proving its value in diverse settings, with successful deployments in countries like Romania demonstrating flawless performance in both on-grid and off-grid scenarios. This proven capability helps European businesses build sustainable competitiveness that combines operational resilience with economic benefits in the energy transition.