Fully Liquid Cooling C&l Battery System

HoyUltra 2 series (Model : HESS-261-2h) is a next-generation fullyliquid cooling C&l battery system by Hoymiles, Its maximum round-trip efficiency can reach 90.3%. Equipped with a 3-level, 6-type safetyprotection mechanism, it ensures 24/7 safe operation. The edge EMSand local APP system enable intelligent operation and maintenance.The battery and PCS feature a fully liquid cooling design, allowingfor full - capacity operation without derating even at 50°C. The corecomponents boasting an IP55 protection rating and noise levels as lowas 60dB.

Highlights:

Safe and reliable
Ensuring sustainable power supply
High investment returns
Reduce costs and improve efficiency
Implemented independently or collaboratively
Zero capital investment from clients
Full investment, construction and operation by provider

Multi-scene applications

Coordinated contral of Photovoltaic, Energy Storage andCharging
Fully liquid cooling design for battery and PCS, enablingoperation without derating at 50%C
IP55 protection level for core components, waterproof anddustproof
Noise levels as low as 60dB, adaptable to supermarkets,hotels,and communities
Operating with 100% three-phase imbalance under load atOff-Grid

Three-level and six-type safaty protection

Efficient Energy Management

Technical Specifications

Model	SGA-261-2h
DC Side
Cell Type	LFP3.2V / 314 Ah
Pack Configuration	1P52S / 52.25 kWh
System Configuration	1P260S
Battery Voltage Range	728 – 936 VDC
Nominal Battery Energy	261 kWh
Temperature Detection	Battery cell + Module + Positive and Negative terminals
AC Side (On-Grid)
Rated Output Power	125 kW (@50℃)
Maximum Output Power	137.5 kW
Rated Grid Voltage Range	340 – 440 VAC
Rated Grid Frequency	50/60 Hz, ±5 Hz
THDi	< 3% (@rated power)
Grid Type	3/N, 3/N/PE
AC Side (Off-Grid)
Rated Output Power	125 kW (@50℃)
Rated Output Voltage Range	340 – 440 VAC
Rated Grid Frequency	50/60 Hz
THDu	< 3% (Linear load)
DC Injection	< 1% Un (Balanced linear load)
Efficiency
Rated Round-trip Efficiency	≥ 88.4%
Maximum Round-trip Efficiency	90.3%
Overload
Overload Capacity	Operate for a long time at 1.1 times (137.5 kW @45℃); operate for no less than 1 minute at 1.2 times the rated load
General Data
Dimensions (W×H×D)	1030 mm × 2450 mm × 1400 mm
Weight	< 2800 kg
Operating Temperature	-30 to +55℃ (> 50℃, derating operation)
Operating Humidity	0 – 100% RH (non-condensing)
Altitude	≤ 2000 m (Optional ≤ 4000 m)
IP Rating	IP55
Cooling Method	Fully liquid cooling (PCS + Battery)
Noise	70 dB (Optional 60 dB)
Rated Charge/Discharge Rate	≤ 0.5P
Fire Suppression System	Perfluorohexanone + PACK-level fire protection + Water fire protection + Interlocked exhaust ventilation + Pressure relief (Optional) + Aerosol (Optional)
AC Inlet Method	Front bottom inlet
Display and Communication
Communication Interface	RS485, Ethernet, DIO
Communication Protocol	MODBUS-RTU, MODBUS-TCP, DL/T645
Cloud Service	Default SGA APP (Support third-party cloud platforms)
Standard and Regulation
Grid Code Compliance	GBT 34120-2023, EN 50549-1/-2/-10, PGMcv 1.4, Synergrid Listed, G99/1-10/03.24, ENA Listed, VDE-AR-N 4105/11.18, DIN VDE V 0124-100/06.20, VDE-AR-N 4110/4120, ZEREZ Listed, CEI 0-21, CEI 0-16, RESP-73/2020, 2016/631 EU-(NC RfG), PSE 2018, PTPiREE Listed, RD244, UNE217001:2020, RD647:2020, UFD Listed, IEC 62116, IEC 61727
Production Compliance	EN/IEC 62477-1:2012, IEC 62619:2022, EN IEC 61000-6-2/4:2019, IEC 63056:2020, GB/T 34131-2023, GB/T 36276-2023, UN38.3 Rev.8, IEC 60730-1 Annex H, IEC 61683, EN & IEC 62920