Fox ESS launches Power Beast C&I battery storage solution

China-based battery manufacturer Fox ESS has introduced Power Beast, a C&I energy storage solution pairing its H3 Plus three-phase hybrid inverter with the modular CQ7 high-voltage battery architecture.

The company said the new solution is designed to replace complex on-site assembly and extensive cabling requirements with a modular plug-and-play architecture and reduce the number of interconnection steps while helping minimize potential wiring errors during installation.

A key feature is the optional CQ7 Dual Tower Base, which supports two battery stacks from a single base and reduces overall system height by up to 50% compared with conventional single-stack configurations, keeping the installation height below 1.3 meters. The base integrates power and communication channels, enabling rapid stack assembly, with module connections completed in as little as five seconds per unit, according to the manufacturer.

The H3 Plus inverter is available in power ratings from 50 kW to 125 kW, including 50 kW, 60 kW, 75 kW, 80 kW, 100 kW, and 125 kW models. It features up to eight MPPT trackers, a maximum input voltage of 1,000 V, and support for PV arrays of up to 250 kW.

Each H3 Plus inverter is equipped with three independent battery inputs. When paired with CQ7 battery modules, each offering a nominal capacity of 6.96 kWh, a single inverter configuration can support up to 292 kWh of battery storage.

The storage system can also be expanded through multi-inverter configurations, scaling up to 3.125 MW/7.35 MWh for grid-connected applications and up to 1.25 MW/2.94 MWh for off-grid systems.

The H3 Plus hybrid inverter series delivers a maximum efficiency of 98.5% and a European efficiency rating of 98.1%, while the CQ7 battery achieves a round-trip efficiency of more than 95%. The battery system uses lithium iron phosphate (LFP, LiFePO₄) chemistry and features an IP65 protection rating for indoor and outdoor installations.

The H3 Plus inverter operates across a voltage range of 180 V to 950 V, while the CQ7 battery operates from 104.4 V to 919.8 V and supports 100% depth of discharge. The inverter is rated for operating temperatures from -30 C to 60 C, while the battery operates from -10 C to 55 C, with optional heating extending the range to -25 C to 55 C.

For backup applications, the H3 Plus includes an integrated Emergency Power Supply (EPS) function with a transfer time of less than 10 ms during power outages. Depending on system sizing, the platform can provide more than six hours of continuous backup power and supports integration with off-grid generators, electric vehicle charging equipment, and solar PV systems, according to the company.

System monitoring and control are managed through the FoxCloud V2.0 web portal and mobile application, with support for RS485, CAN, Wi-Fi, LAN, and optional 4G connectivity.