GridUltra 6251
GridUltra Centralized Liquid-Cooled Energy Storage Solution
GridUltra 6251 Liquid-Cooled Energy Storage System features a 20-foot container as the standard carrier, integrating 8 battery clusters, control units, a liquid cooling system, a fire protection system and a BMS system.
Product Features
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High Efficiency
GridUltra represents the most advanced design implemented by RelyEZ to date, built on experience gained from over a hundred projects and multiple R&D iterations. The non-walk-in container features a modular design that facilitates fast project delivery while also reducing installation and maintenance costs.
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High Safety
Liquid-cooled modules with IP67 protection level, intelligent fire protection system design, multi-point monitoring and warning. Temperature difference of the cell is less than 3°C, excellent temperature homogeneity.
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High Life Cycle
Liquid-cooled batteries with a cycle life of over 8000 cycles, high efficiency and a design life of up to 15years.
Product Composition
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Core Advantage
Standardized 3.125MW/6.25MWh capacity designed for 0.5C energy storage scenarios. Dual-stack independent architecture supports single-stack maintenance and scheduling without affecting the operation of the other stack. A 100MWh grid-scale energy storage power station can be fully configured with 16 GridUltra 6251 units.
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Battery Module
A single module is configured with 104 pieces of 587Ah LFP cells in a 1P104S arrangement.
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Battery Rack
Each cluster is composed of 4 liquid-cooled battery modules, with 2 clusters in a single row connected to 2 high-voltage control boxes
Technical Specifications
| Item | GridUltra 6251 |
| Industry Certification | |
| Battery Cell | IEC62619, UL1973, UL9540A |
| Battery Pack | IEC60730-1, UN38.3, UL1973, UL9540A, UL 60730-1 |
| Battery Rack | IEC62619, IEC 60730-1, IEC 63056, IEC62477-1, UL1973, UL 9540A, UL 60730-1 |
| System | IEC 62477-1, IEC 60730-1, EN IEC 61000-6-2/4, UN38.3, UN3536, UL9540, UL 60730-1 |
| Battery Parameter | |
| Configuration | 2*4P416S |
| Nominal Energy | 6251kWh-0.5P, 100% DOD |
| Nominal Voltage | DC 1331.2 V |
| Voltage Range | DC 1164.8 to 1497.6 V |
| DC System Parameters | |
| Rated Charging Current | 2*1174 A |
| Maximum Charging Current | 2*1504 A |
| Rated Charging Power | 2*1725 kW |
| Rated Discharge Current | 2*1174 A |
| Maximum Discharge Current | 2*1504 A |
| Rated Discharge Power | 2*1725 kW |
| Auxiliary Power Supply Voltage | AC400V, TN-C |
| Operation Ambient Temperature | -30°C to 50°C (-22°F to 122°F) |
| Storage Temperature | -20°C to 35°C (-4°F to 95°F) |
| Application Altitude | ≤3000 m (≤9,843 ft) Available, Derate |
| Humidity | 0 to 95% (Non-Condensing) |
| Estimated Fault Current | 2×76 kA |
| Number of DC Output Branches | 2 Outputs |
| Communication Method Between BMS and PCS | Support CAN/Modbus 485/TCP Communication Methods; CAN Communication Is Recommended. |
| Basic Paramaters | |
| Dimensions (L x W x H) | 6058 x 2438 x 2896 mm (238.50 x 95.98 x 113.98 in) |
| Weight | Approximately 47 t (103,617 lb) |
| Container IP Rating | IP55 |
| Module IP Rating | IP67 |
| Cooling Method | Liquid-Cooling |
| Noise at 1m | ≤85 dB |
| Warranty | |
| Standard | 5 years (Included) |
| Extended Warranty | 15 years-covered by Munich Re |
