EPC Engineering, Procurement and Construction for BESS

The BESS integrates an advanced Battery Management System (BMS) that collects and consolidates information from all String Management Units (SMUs). By continuously monitoring the critical parameters—voltage, temperature, and current—the BMS ensures optimal operation of the battery modules in each rack and instantly activates internal and external protection and safety systems whenever required.

To maximize long-term value, the Energy Storage System is sized using a declining-capacity strategy: the battery capacity is dimensioned for beginning-of-life, then managed throughout the BESS lifetime in line with real annual usage. This approach supports flexible operation while maintaining predictable performance over time.

On top of the BMS, the Monsson Energy Management System (MEMS) continuously monitors the key drivers that define battery performance and lifetime: energy throughput, average state-of-charge across multiple time domains, C-rate, temperature, and calendar life. MEMS also compares the planned capacity trend with the actual measured capacity, validated through an annual capacity check, enabling proactive optimization and transparent lifecycle tracking.

Where Monsson clearly differentiates is our battery cooling system—Monsson intellectual property—engineered to protect the cells and preserve performance year after year. The Primary Cooling Circuit (PCC) includes a chiller unit, heat pump, dry cooler, and heat exchange system, each with dedicated piping, pumps, monitoring, and safety systems, ensuring optimal battery temperature regardless of ambient conditions or load. The Secondary Cooling Circuit (SCC) uses special frequency-controlled pumps, comprehensive flow/temperature/pressure sensing, and a dedicated cooling network to each rack and module, complete with expansion and safety components.

The entire cooling system is fully automated via PLC control, with continuous adjustment of both circuits. Any deviation in temperature, pressure, or flow is immediately transmitted to the dispatch center through SCADA, using multiple alarm levels for rapid response. Most importantly, the ESS automation logic is focused on maintaining battery temperature in a tight optimal window around ~22°C, preventing temperature rise during normal operation and significantly reducing battery wear—one of the key reasons Monsson systems deliver superior durability and reliability in the long term.

Our BESS uses an advanced BMS collecting data from all SMUs to optimize each rack and activate protection systems in real time. MEMS continuously monitors the parameters that drive battery lifetime (throughput, SOC, C-rate, temperature, calendar life) and verifies actual capacity via an annual capacity check, while sizing follows a declining-life strategy aligned with real usage.

Monsson’s proprietary cooling architecture (primary + secondary circuits) is fully automated (PLC) and monitored via SCADA to maintain battery temperature in a narrow window around ~22°C, significantly reducing degradation over time.