Representative product image.

ROCAS 522 AC

High-capacity BESS

Large-capacity cabinet integrating battery, PCS, EMS, BMS, liquid cooling and fire protection. Supports peak shaving, demand response and parallel expansion.

Energy: 522 kWh
Power: 250 kW
Cell: LFP 314 Ah
Cooling: Liquid
Dimensions: 1,900 × 1,350 × 2,300 mm
Weight: 5,340 kg

Download datasheet Discuss this system

PDF, English, 452 KB

Technical specifications

AC / grid-connected

Rated output	250 kW
Overload	1.1× continuous; 1.2× for 1 min
Rated voltage / wiring	400 V (-15% to +15%); 3P+N+PE
Rated current	360 A
Power factor	-1 to +1
Grid frequency	50/60 Hz ±2.5 Hz
THDI	≤3%

AC / off-grid

Voltage	400/380 V ±3%
Frequency	50/60 Hz
THDU	<3% with linear load
Unbalanced load	100%

Battery

Cell chemistry / rating	LFP; 3.2 V / 314 Ah
Configuration	2P260S
Energy at 25°C / 0.5P	522.496 kWh
DC range / nominal	702–936 V / 832 V
Cycle life	8,000 cycles (0.5P, 25 ±2°C, 70% SOH)

System / environment

Off-grid switching	<20 ms
Dimensions W × D × H	1,900 × 1,350 × 2,300 mm
Weight	5,340 kg
Noise	<75 dB
Enclosure / battery pack	IP54 / IP67
System efficiency	≥88%
Ambient temperature	-30 to +55°C
Humidity	≤95% RH, non-condensing
Cooling	Liquid cooling
Fire suppression	Aerosol
Communications	Ethernet / CAN / RS485
Maximum altitude	2,000 m
Standards*	IEC 62933; IEC 62477; IEC 62619; IEC 63056; IEC 61000; UN 38.3

Specifications are indicative and refer to the standard configuration. Final values, certificates and warranty terms are confirmed in the project-specific technical offer.

* Standards referenced in the product documentation. Model-specific conformity documents are provided for project review.

Product images are representative. Final appearance depends on the selected configuration.