Amid the Baltic region’s stringent grid stability requirements, Kehua’s C&I liquid-cooled S³-EStore systems have been deployed at a Latvian industrial facility, ensuring uninterrupted participation in ancillary markets. This project demonstrates how modular energy storage solutions can proactively address safety challenges while maintaining critical grid service continuity. 

Central to this deployment is the system’s liquid-cooling thermal mastery, which maintains battery cell temperature differentials within a razor-thin ±1.5°C range even under extreme climatic swings—from -30°C winters to 40°C summers. This precision thermal control ensures consistent electrochemical performance across seasons.

The plant’s adoption of cabinet-based S³-EStore units—rather than centralized container systems—reduces fire propagation risks through physical separation while ensuring operational continuity. Kehua's distributed architecture enhances system resilience, enabling continuous Frequency Containment Reserve (FCR) service even during partial cabinet isolation. This design aligns with Baltic grid codes requiring ancillary service providers to maintain operational continuity under predefined fault scenarios.

To overcome the industry-wide challenge of poor efficiency in battery energy storage systems (BESS) and power conversion systems (PCS) at low power outputs, the project implements proprietary software algorithms. By sequentially activating cabinets with a minimum 20% power threshold during stable grid conditions, the system maintains optimal efficiency while preserving rapid FCR response capabilities—a critical balance for revenue-generating ancillary market participation. 

Besides, the cabinet-level modularity enables maintenance without plant downtime. Technicians can isolate individual units via SCADA systems for servicing while the remaining cabinets continue delivering grid services. This "always-on" approach ensures uninterrupted revenue streams from frequency regulation markets, a key advantage given the Baltic TSO’s emphasis on emergency response reliability.

Uniform S³-EStore cabinet designs across the facility streamline technician training and spare parts management. This consistency reduces human error during maintenance and accelerates troubleshooting—a vital feature for medium-sized plants where operational teams often manage multiple responsibilities.

Kehua’s collaboration with the Baltic  factory demonstrates how cabinet-scale energy storage can reconcile challenge toward complex hardware with grid operators’ uncompromising reliability demands. By prioritizing fault-tolerant architecture, software-enhanced efficiency, and maintenance flexibility, the S³-EStore deployment establishes a replicable model for European industries navigating tight frequency regulation margins and evolving safety standards.

About Kehua Digital Energy

Based on 37 years of experience in power electronic technology, Kehua has diversified solutions and rich project experience in the fields of photovoltaic, energy storage, micro-grids and integrated energy services. By the end of 2024, Kehua´s PV installation has exceeded 56 GW and its energy storage installation has exceeded 30 GW/12 GWh globally. Presently, Kehua has become the world's third largest PCS supplier (S&P Global), a Tier 1 energy storage supplier and a Top 10 solar inverter manufacturer (BloombergNEF). As a reliable PV and ESS expert, Kehua is dedicated to enabling a zero-carbon lifestyle for individuals worldwide.