Ecosolex Displays Its ESS Lineup At Intersolar

Ecosolex, the energy storage system (ESS) arm of China-based Topband New Energy, showcased its latest product lineup, including integrated, modular, and containerized commercial & industrial (C&I) and residential ESS at Intersolar Europe. The company also highlighted its energy management system (EMS), which accumulates, analyzes, and visualizes real-time data and automatically manages energy flow via a cloud-based platform. 

Among the flagship products showcased were the EcoStor C series M125G261A and P125G261A liquid-cooled C&I ESS. These products integrate battery storage, power conversion system (PCS), EMS, thermal management, and fire protection within a single cabinet. They have a rated capacity (charging/discharging) of up to 261 kWh at a full-load power (3-phase) of 125 kW for up to 2 hours. 

The first of these two consists of lithium-iron-phosphate (LFP)-based 314 Ah cells within 5 vertically stacked battery packs, each having a 1P52S cell layout. Its bidirectional PCS, which uses silicon carbide (SiC)-based power switching devices instead of traditional silicon-based ones, can charge or discharge up to 125 kW of power. In terms of operations, this discharged power can offset the overshooting of C&I consumers’ scheduled peak power for a certain duration (peak shaving) during high tariff periods. On the flip side, it charges its storage during a low-tariff period with low scheduled consumer demand (valley filling), maximizing utilization of excess PV generation. These complex operations generate heat, which is controlled by a circulating liquid containing 50:50 pure water and ethylene glycol, preventing freezing in Europe’s cold climates. The system has an operating temperature range of -20 to +55°C without derating. 

The latter, which integrates PV, a diesel generator (DG), and the AC grid, offers hybrid functionality. It switches to off-grid mode during a grid outage, providing emergency backup via storage, DG, or PV, while ensuring no backfeed to the grid. It provides energy backup while ensuring the safety of any utility operators. In on-grid mode, it can absorb or inject inductive or capacitive power to the grid, helping to maintain grid stability with real-time reactive power support. 

For flexible deployment scenarios, Ecosolex promoted its Flexo 50 series ESS, which combines 53.7 kWh of storage, PCS, and EMS in a pre-integrated cabinet, measuring 1,020 × 1,200 × 1,400 mm (W × D × H). With a depth-of-discharge (DoD) of up to 93%, it has a rated capacity (charging/discharging) of 50 kWh of energy at a full-load power (AC) of 30 kW. This capacity can be further expanded to an off-grid power output range of 30-120 kWh by connecting 4 cabinets in parallel. In terms of PV capacities, the system, featuring 3 MPPT channels, supports up to 45 kW with up to 150% DC/AC oversizing. The company claims that the system switches to emergency backup mode to deliver up to 30 kW of off-grid power within less than 10 ms of a grid outage. It is promoted for small commercial facilities, EV charging sites, and distributed PV-plus storage applications. 

From the Flexo series, the company also highlighted the Flexo 200, a modular outdoor ESS platform. It is designed for medium-sized C&I applications that require scalable capacities and deployment flexibility. 

Among the showcased products was a 2-hour containerized battery energy storage system (BESS), Valtrix String 3.0. Equipped with 12-string PCSs (rated at 125 kW), each catering to a 261-kWh battery cluster, which consists of 314 Ah LFP cell-based battery packs laid in a 1P260S layout. Unlike the conventional centralized PCS-based system, this modular configuration enhances system flexibility in terms of breakdown and operation & maintenance (O&M). From an operational standpoint, it offers a rapid response and can participate in a regional virtual power plant (VPP) aggregation program to generate passive revenue. The company says this product is commercially available and is being exported globally. 

Ecosolex also displayed several residential energy storage products, including the Opti L16 battery system, a 6 kW all-in-one residential ESS, and both high-voltage and low-voltage rack-mounted battery platforms. The residential portfolio is intended for applications including rooftop solar self-consumption, backup power, and household energy management.