Is the capacity customizable?

Yes, the nominal capacity is customizable, available in 500kWh, 1MWh, 2MWh, and 3MWh options.

What warranty is provided?

The product comes with a 10-year warranty.

20FT 40FT Bess Container 1mwh 2mwh Lithium Ion Battery Energy Storage System

Name: 20FT 40FT Bess Container 1mwh 2mwh Lithium Ion Battery Energy Storage System
Brand: Sunsky Co., Ltd
SKU: 1989976031

Anhui, ChinaSunsky Co., Ltd

US$0.16-0.28

100,000 Watt

Sample price:US$46500.00/set.Request sample

Product profile

Customization

Available

Container Size

6058*2438*2591mm

Weight

<30mt

Model NO.

SUN1MW-ESS

Nominal Voltage

208/220/400/480V 3phase

Warranty

10 Years

Nominal Capacity

500kwh, 1mwh,2mwh,3mwh (Customzable)

Cycle Life

8000 Times and up Lithium Battery

Nominal Grid Frequency

50Hz/60Hz

Certification

ISO, CB, CE, TUV/Un38.3/En50549

Product Name

Air/Liquid Cooling Container Energy Storage System

Dod

90%

Degree of Protection

IP65

Battery Type

Liquid Cooling,Lithium Ion, LiFePO4 Battery

Install

Ground/Carport/Rooftop

Technical Support

Complete Professional Technical Guidance

Application

Industrial/Commercial/Factory/Hospital

BMS Communication Interface

Ethernet, Can, RS485

Container

for Outdoor Installation

Cooling Concept of DC Hatch

HAVC

Battery

Air/Liquid Cooling

Local Monitoring EMS

Yes

Isolated Transformer

Included

Transport Package

Container

Specification

20FT/40HQ

Trademark

SUNSKY

Origin

China

HS Code

8504403090

Production Capacity

300sets/Day

Key features

Flexible Customization: Nominal capacity (500kWh-3MWh) and grid frequency (50/60Hz) are customizable.

Integrated Design: PACK, EMS, BMS, HVAC, and fire safety integrated into one cabinet for easy transport.

10-Year Warranty: Comprehensive 10-year warranty coverage for the energy storage system components.

IP54 Protection: Outdoor installation ready with IP54 degree of protection against dust and water.

Multiple Working Modes: Supports on-grid/off-grid switching and flexible mode settings for various scenarios.

Real-time Monitoring: Supports real-time online monitoring of system status and full lifecycle data storage.

Company profile

High Repeat Buyers ChoiceFast DeliveryFull CustomizationImporters and Exporters

Sunsky Co., Ltd

Anhui, China

Business Type: Manufacturer/Factory, Trading CompanyAverage Response Time: ≤2.91h

AI-Powered supplier vetting

SummaryHefei Sunskypv Co., Ltd. is a China-based trading company established in 2022, offering solar panels, inverters, batteries, combiner boxes, and mounting systems. It reports broad customization capability, documented finished-product inspection instructions, export activity, and stated annual output across lithium batteries, solar systems, and solar panels. However, the supplier has only four employees and a 78.28 m² manufacturing plant, while its service procedures lack written records. No SDK is available, overseas service infrastructure is absent, and environmental and fire-drill status are unknown. An SGS audit was conducted from 2025-02-28 to 2026-02-27, but the provided audit result value is not interpretable as a certification conclusion.

Supplier typeThe supplier is explicitly identified as a trading company and a limited company based in Hefei, Anhui, China. Its listed product scope covers solar panels, inverters, batteries, combiner boxes, and mounting systems, indicating a renewable-energy equipment trading and supply business.

After-Sales capabilityThe supplier has procedures for corrective and preventive actions and customer complaint handling, but no written records support their implementation. It also lacks overseas showrooms, overseas agents or branches, and offline trade-show participation, limiting demonstrated overseas service coverage.

Production capacityThe supplier reports annual output of 800,000 lithium batteries, 100,000 solar systems, and 100,000,000 solar panels, with stated order fulfillment within 15 working days in both peak and off-peak periods. Against this, it is classified as a trading company with four employees and a 78.28 m² plant, so the records support reported supply capacity but do not clearly verify owned manufacturing capability.

Customization capabilityThe supplier explicitly offers customization from samples and designs, minor and full customization, and flexible customization. It also states that finished-product inspection instructions are available and uniformly followed, supporting both customization scope and a defined inspection method.

Product Q&A

Q:How does DC coupling optimize renewable energy use?

It allows solar energy to be stored directly with minimal losses, enhancing sustainability by using more generated power on-site or dispatching it to the grid.

Q:What is the role of the Power Conversion System (PCS)?

The PCS is the core component, functioning as a high-power bidirectional inverter that converts DC from solar and batteries to AC, streamlining infrastructure.

Q:What are the primary advantages of DC-coupled systems?

Key advantages include higher overall system efficiency, simplified layout with fewer components, reduced BOS costs, and seamless on-grid/off-grid integration.

Q:Why is DC coupling more efficient?

DC coupling avoids multiple DC-AC-DC conversion steps, allowing solar energy to charge batteries directly in DC form, reducing energy losses and maximizing ROI.

Q:What is DC coupling in large-scale solar storage?

It is an architecture where solar panels and batteries connect on the same DC bus before conversion to AC by a single centralized inverter, a highly efficient solution.