Sunsky 1MW 2MW 3MW 4MW 5MW off Grid Energy Storage Bess Container System 2mwh 3mwh 4mwh 5mwh Ess Lithium Battery Energy Storage System 20FT 40FT Container

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Product Description

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Overview & Basic Info

Model NO.
SUN1MW-ESS
Nominal Voltage
208/220/400/480V 3phase
Warranty
10 Years
Nominal Capacity
500kwh, 1mwh, 2mwh, 3mwh (Customizable)
Cycle Life
8000 Times and up Lithium Battery
Degree of Protection
IP65 / IP54
Battery Type
Lithium Ion, LiFePO4 Battery
Application
Industrial/Commercial/Factory/Hospital
Cooling System
Air/Liquid Cooling
BMS Interface
Ethernet, CAN, RS485
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Product Description

The 20-ft and 40HQ liquid-cooled ESS container integrates PACK, EMS, BMS, HVAC, and fire safety system into one cabinet. Compared with air cooling, liquid cooling empowers the ESS product with higher power density and ensures the temperature difference between the cells within 3 ºC, which effectively extends battery service life and improves energy efficiency. This system is applicable to the power generation side, grid side, as well as C&I ESS scenarios.

Energy Storage System Container 1
Energy Storage System Container 2
Energy Storage System Container 3
Product Technical Overview
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Product Parameters

Specifications 20FT - 0.5MW/1MWh 40FT - 1MW/2MWh
Cell type3.2V/280Ah/LFP
Cell brandHIGEE/EVE/REPT/CORNEX
Life cycle>8,000 cycles @0.5C, 25°C
Total Rated Energy1003.52kWh2007.04kWh
Rated voltage627.2V
Rated AC power1*500kW2*500kW
Dimension (L*W*H)6058*2591*2438mm12116*2438*2896mm
Operating Temp-20~65°C
Fire ExtinguisherHFC bottle group
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Key Features

1. Multiple working modes can be flexibly set.

2. Support battery management system and comprehensive thermal management.

3. Support real-time online monitoring of system status.

4. Support simultaneous access to load, battery, grid, DG, and PV.

5. Separated electrical and battery compartments to prevent thermal runaway spread.

6. Integrated design, easy to transport, install, and deploy.

System Interface
Internal Layout
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System Components

TOPCon Solar Panels

High efficiency up to 22.84%. Complies with European standard IEC61215 and IEC61730. Features SMBB + Half-cell tech to reduce internal current loss and improve module reliability. Lower temperature coefficient (-0.29%/ºC).

Solar Panels

All In One Hybrid Inverter

Intelligent IC control with multiple protection functions. Pure sine wave output, Alumimum alloy shell, and 10 Years Warranty. Supports smart monitoring and management.

Hybrid Inverter

Storage Battery Bank

Standard battery modules consisting of 16 units of 3.2V single cells. Nominal voltage 51.2V. Capacity customizable from kWh to MWh/GWh scales depending on project requirements.

Battery Bank
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Manufacturing & Projects

Factory Floor
Production Line

Project Showcases

Project 1
Project 2
Project 3
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FAQ

How does DC coupling optimize renewable energy use?
It allows for captured solar energy to be stored directly with minimal losses. This ensures a greater portion of generated power is used on-site or dispatched efficiently to the grid.
What role does the Power Conversion System (PCS) play?
The PCS acts as a high-power, bidirectional inverter that converts DC from solar and batteries to AC. it streamlines the infrastructure by replacing separate solar and battery inverters.
What are the advantages of DC-coupled systems for large projects?
Key benefits include higher overall system efficiency, a simplified layout with fewer components, reduced BOS costs, and seamless integration for both on-grid and off-grid scenarios.
Why is DC coupling more efficient for battery storage?
It avoids multiple DC-AC-DC conversion steps. Solar energy directly charges batteries in DC form, which reduces energy loss and maximizes ROI in large-scale applications.
What is DC coupling in large-scale storage?
It is an architecture where solar panels and batteries are connected on the same DC bus before being converted to AC by a single centralized inverter.
Is the system compatible with different grid voltages?
Yes, the system supports multiple output voltages including 380V, 400V, 220V, and 480V, making it suitable for various international power standards.

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