Hoymiles Fully Liquid Cooling C&I Battery System | HoyUltra 2
HoyUltra 2 series (Model : HESS-261-2h) is a next-generation fully liquid cooling C&I battery system by Hoymiles. Its maximum round-trip efficiency can reach 90.3%. Equipped with a 3-level, 6-type safety protection mechanism, it ensures 24/7 safe operation. The edge EMS and local APP system enable intelligent operation and maintenance.
The battery and PCS feature a fully liquid cooling design, allowing for full-capacity operation without derating even at 50°C. The core components boasting an IP55 protection rating and noise levels as low as 60dB.
| HoyUltra 2 Series | |
| Model | HESS-261-2h |
| DC Side | |
| Cell Type | LFP3.2V / 314Ah |
| Pack Configuration | 1P52S / 52.25kWh |
| System Configuration | 1P260S |
| Battery Voltage Range | 728 - 936VDC |
| Nominal Battery Energy | 261kWh |
| Temperature Detection | Battery cell + Module + Positive and Negative terminals |
| AC Side (On-Grid) | |
| Rated Output Power | 125kW (@50°C) |
| Maximum Output Power | 137.5kW |
| Rated Grid Voltage Range | 340 - 440VAC |
| Rated Grid Frequency | 50/60Hz, ±5Hz |
| THDi | <3% (@rated power) |
| Grid Type | 3P3W / 3P4W |
| AC Side (Off-Grid) | |
| Rated Output Power | 125kW (@50°C) |
| Rated Output Voltage Range | 340 - 440VAC |
| Rated Grid Frequency | 50/60Hz |
| 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 (137.5kW@45°C), Operate for no less than 1 minute at 1.2 times the rated load |
| General Data | |
| Dimensions (W × H × D) | 1030 × 2450 × 1400 mm |
| Weight | <2700kg |
| Operating Temperature | -30 to +55°C (>50°C, derating operation) |
| Operating Humidity | 0 - 100%RH (non-condensing) |
| Altitude | ≤2000m (Optional ≤4000m) |
| IP Rating | IP55 |
| Cooling Method | Fully liquid cooling (PCS + Battery) |
| Noise | 70dB (Optional 60dB) |
| 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 S-Miles APP (Support third-party cloud platforms) |
Featuers
Three-level and six-type safety protection
Active / Passive / Ultimate protection, 3S Active intervention / PACK / Cabinet / Interlocked, Exhaust ventilation / Pressure relief / Cloud early warning protection
Efficient Energy Management
Local optimization of edge EMS, global data analysis in the cloud, Interconnected with the APP system to achieve division of labor, collaboration, and efficient management
Multi-scene applications
Coordinated control of Photovoltaic, Energy Storage and Charging, Fully liquid cooling design for battery and PCS, enabling operation without derating at 50°C, IP55 protection level for core components, waterproof and dustproof, Noise levels as low as 60dB, adaptable to supermarkets, hotels, and communities, Operating with 100% three-phase imbalance under load at Off-Grid
Energy Solutions
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