20 ft AC storage container
A 500 kW / 1.045 MWh liquid-cooled AC energy storage system pre-integrated in a 20-foot container.

Battery, PCS, temperature control, fire protection and management systems are pre-integrated in a 20-foot container and commissioned at the factory, so on-site work is limited to wiring. Five clusters of 3.2 V / 314 Ah LFP cells (1P208S each) give 1.045 MWh at a rated 665.6 V, with a maximum charge/discharge rate of 0.5C. It suits high-power industrial sites, commercial centers and solar-plus-storage EV charging, and coordinates with PV, wind and diesel generation.
Battery, PCS, temperature control, fire protection and management systems are pre-integrated in a 20-foot container and fully commissioned before leaving the factory, so the unit is ready once wired on site.
Liquid cooling holds the temperature difference between cells at or below 3 °C, and an intelligent temperature control strategy supports a system energy efficiency of at least 94%.
Automatic allocation and optimized operation of multiple sources such as PV, wind and diesel generators. PQ/VF automatic switching moves seamlessly between grid-connected, off-grid and standby modes.
Three-level fire protection combining five-in-one composite detection, temperature and smoke sensing, and aerosol extinguishing. The enclosure is rated IP54, corrosion class C4 and seismic level 7 for harsh environments.
Automatic scheduling and start/stop control of PV, wind and diesel generators. PQ/VF automatic switching supports grid-connected, off-grid and hybrid modes.
Dual liquid-cooling and air-cooling system with remote adjustment of the control strategy.
Five-in-one detection, aerosol fire extinguishing, audible and visual alarm, and remote emergency stop.
Supports Modbus TCP, CAN and RS485, and connects to cloud platforms and energy management systems.
Open a section to see its details, or download the complete datasheet.
Specifications are based on manufacturer test data and may change without notice. Standards and certifications refer to the manufacturer's test reports, available on request. The final configuration, performance and warranty terms are confirmed in each project proposal.
Utility-scaleModular DC-side BESS
Utility-scaleContainerized BESS
Utility-scaleLiquid-cooled BESS container
Tell us about your site, your load and your goals. Our engineers will confirm the right configuration and send you a tailored proposal, including installation, operation and financing options.
Rock 1045 datasheet (PDF)