Dunet’s latest PowerHill ESS system combines five 314 Ah LFP battery packs with a storage capacity of 261 kWh and a 125 kW PCS in an all-in-one cabinet
Connecting up to 10 units in parallel expands the storage capacity to 2.61 MWh
The system comes with 8,000 cycles at 70% end-of-life capacity
The cooling system comes with automatic coolant replenishment and uses lower-GWP R513A refrigerant instead of R134a
Dunext, a China-based provider of commercial and industrial (C&I) scale energy storage systems (ESS), has launched its PowerHill 261 kWh all-in-one system for Europe.
The liquid-cooled model increases cabinet capacity compared with the company’s earlier PowerHill 233 kWh liquid-cooled and PowerHill 215 kWh air-cooled systems. Dunext is positioning the new product for European C&I applications.
The cabinet integrates five battery packs based on 314 Ah LFP cells, a 125 kW power conversion system (PCS), an energy management system (EMS) and a battery management system (BMS). It measures 1,026 × 2,366 × 1,350 mm (W × H × D) and provides 261 kWh of energy capacity at a rated charge/discharge power of 125 kW.
For PV-plus-storage applications, the system can communicate with existing or new third-party inverters. A dual-meter configuration measures PV generation and site load. Dunext’s DuLink cloud-based EMS displays the data and supports functions including time-of-use scheduling, maximizing PV self-consumption, electricity-market participation, backup power, zero-export control and demand control.
For backup applications, Dunext offers two transfer options: a sub-20 ms switch for critical loads and a lower-cost option with a switching time of about 20 seconds. The company says the system can supply its rated 125 kW backup output for approximately 2 hours, subject to usable energy and operating conditions. Up to 10 units can be connected in parallel in a master-slave configuration and installed side by side, providing 1.25 MW/2.61 MWh in total. The master unit is configured at the factory, while additional units can be added later. The product datasheet specifies 8,000 cycles at 70% end-of-life capacity.
The PowerHill 261 kWh combines protection at the battery-pack, electrical and fire-suppression levels. According to Dunext, its six-layer electrical safety architecture covers the power path from the battery packs and high-voltage box to the PCS and grid connection. The PCS protection is designed to interrupt operation within microseconds after an abnormal signal is detected. Each battery pack has six-sided insulation, which the company says helps limit fault propagation. Pack-level aerosol fire suppression is designed to respond within milliseconds, while built-in dry contacts can relay an alarm signal to the building fire system.
Liquid coolant circulates through a closed-loop piping system and cold plates beneath the battery packs. Dunext says the system maintains the cell-to-cell temperature difference below 2.5 °C. It operates at ambient temperatures from -25 °C to +55 °C, with derating above 45 °C. The automatic replenishment function monitors pressure in the return-water line and refills coolant from a tank when required. According to Dunext, the coolant does not require replacement for 10 years. Separately, the thermal-management unit uses R513A refrigerant, which the company lists with a global warming potential (GWP) of 631, around 70% lower than R134a. Dunext says the refrigerant choice complies with EU F-gas Regulation 2024/573. GWP compares the heat-trapping effect of a gas with that of CO₂.
Dunext says its European spare-parts warehouses and service teams can provide on-site support within 48 hours in its core markets.
