Sail Solar 125kW/261kWh Liquid-cooled Energy Storage System All-in-one ESS Outdoor Battery Cabinet
This is a independent liquid-cooled energy storage battery cabinet, adopting the "ALL-IN-ONE" design concept. It integrates long-life battery cells, high-efficiency equalization BMS, high-performance PCS, intelligent power distribution system, and the liquid cooling technology into a single cabinet. It can achieve long-term safe, stable, and reliable operation, and through parallel connection on the AC side, it enables flexible capacity deployment of the energy storage power station.
Artikelnummer :
BESS-P261Kühlung :
Liquid CoolingKommunikationsanschluss :
CAN, RS485Kapazität :
261KWHAusgangsspannung :
380V / 400V, Other Voltages CustomizedSchutzklasse :
IP55Garantie :
10 YearsZertifikat :
CETyp :
All-in-oneThis liquid-cooled energy storage all in one battery cabinet uses 314Ah Lifepo4 battery cells, which have the advantages of wide voltage range, high efficiency and stability, and long service life. It is suitable for various application scenarios such as factories, commercial complexes, and integrated photovoltaic-energy storage and charging stations with large capacity requirements.

Specification
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MODEL
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BESS-P261 |
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| Battery Energy(kWh) |
261KWH |
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| Rate Power |
125KW |
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| AC Output |
400V, 3L+N+PE, 50Hz/60Hz |
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| Transfer Time |
≤20ms |
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| Communication |
RS232/RS485/CAN/BLUETOOTH/ WIFI |
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Cooling Method
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Liquid Cooling
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Storage Temperature Range
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-20~45°C
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Operation Temperature
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-20~55°C |
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Humidity
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5%RH~95%RH |
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Altitude
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≤3000m
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Safety System
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Aerosol
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BATTTERY PARAMETERS
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Battery Chemistry
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LiFePO4
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| Nominal Capacity |
314Ah |
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| Composition Method |
1P260S |
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| Nominal Voltage |
832V |
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| Operating Voltage Range |
728-936V |
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| Efficiency |
>94% (DC side) |
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| Max Charging Current |
140A |
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| Max Discharging Current |
140A |
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| Cycle |
8000 cycles 80%DOD, 0.5C |
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Calendar Life
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10 years |
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PCS PARAMETERS
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Max DC power
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137kw/1min |
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| Rate Operating Voltage |
AC 400VAC |
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| Max AC Current |
180A |
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| Approved Grid Frequency Range |
50/60Hz |
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| AC Harmonic Voltage |
<3% (linear load) |
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Voltage Deviation
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<5% (linear load) (phase<3%) |
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| MECHANICAL SPECIFICATIONS | |||
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Machine Dimension (W*H*D)(mm)
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1050*1350*2400 |
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| N.W(kg) |
2600 |
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| IP Grade |
IP55 |
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Certification & Standards
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CB, CE, EMC, UN38.3, RoHs |
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Product Description

High-Voltage Lithium Battery Pack:
1. Employs 314Ah lithium iron phosphate cells, achieving a nominal capacity of 52.49kWh per pack through a 1P52S assembly design, easily forming a 261kWh commercial-grade battery energy storage system.
2. High-efficiency liquid cooling and wide temperature adaptability: Standard liquid cooling system ensures stable temperature control at 0.5P charge/discharge rates;supports reliable operation in ambient temperatures ranging from -25℃ to 55℃.
3. High safety and easy maintenance: Achieves IP65 protection rating, integrates an MSD manual maintenance disconnect switch, and a BMS communication interface for full lifecycle monitoring, enhancing operational safety.
4. Long lifespan and high economic efficiency: Lithium iron phosphate cells have excellent lifespan, and combined with an intelligent management system, extend their service life; suitable for commercial and industrial energy storage scenarios, helping users reduce electricity costs and improve return on investment.

The battery has a capacity of 261kWh and is connected to a high-voltage switch box via cables, then to a three-phase four-wire energy storage converter (PCS) inside the box.
A single system is configured with one 125kW PCS unit, connected to a 400Vac AC bus. This PCS unit possesses a range of special features and functions, enabling the battery system to charge and discharge under various application scenarios.
The system is also equipped with an integrated battery management system (BMS), employing a two-level management architecture and three-level software protection (including module-level and battery pack-level) to achieve comprehensive control, management, and protection of the battery system, ensuring its safe and stable operation.
As a core component of the energy storage system, the EMS is responsible for collecting the status and data of all devices within the system, receiving charge and discharge requests from the system, generating control strategies based on control requirements, and controlling the system's operation.
Kundendienst
● „24/7“-Kundendienst
● 7 Tage die Woche, 24 Stunden am Tag: Sofortige Reaktionsfähigkeit und Problemlösung – das Versprechen von Sail Solar für einen sorgenfreien Kundendienst.
● Service-E-Mail: info@sailsolress.com
Serviceprozess
01
Serviceanfragen einreichen
Sie können Ihre Serviceanfragen jederzeit per E-Mail, über den Online-Kundenservice oder die mobile App einreichen.
02
Schnelle Reaktion
Unser Serviceteam wird umgehend auf Ihre Anfragen reagieren und Ihnen die Details des Problems mitteilen.
03
Vor-Ort-Service oder Fernwartung
Je nach Art des Problems bieten wir Vor-Ort-Service oder technischen Support per Fernzugriff an.
04
Problemlösung
Unser Ziel ist es, Ihr Problem innerhalb von 24 Stunden vollständig zu lösen.
05
Nachverfolgen
Nachdem das Problem behoben wurde, wird unser Team weiterhin nachfassen, um Ihre Zufriedenheit mit den Ergebnissen unserer Dienstleistung sicherzustellen.
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