Home Products Energy Storage Battery Cabinet 1000KWH Containerized Energy Storage System 1.2MWh | 20FT Outdoor ESS Utility Scale

Containerized Energy Storage System 1.2MWh | 20FT Outdoor ESS Utility Scale

1000KWH

Containerized Energy Storage System – 1.2MWh | 20FT Utility & Grid-Scale ESS

The 20-foot containerized energy storage system offers a compact, utility-scale solution for grid support, renewable energy integration, and commercial applications requiring medium-capacity storage in a standardized format. With a rated energy of 1.2 MWh and a rated voltage of 768 V, this system delivers reliable performance in a space-efficient 20-foot container footprint.

Built with LiFePO₄ (LFP) battery cells, the system features 5 modules of 51.2V 314Ah configured in parallel, achieving a round-trip efficiency of 96% and a design lifespan exceeding 15 years. The system supports 0.5C charging and 0.5C to 1C discharging, with a 90% depth of discharge (DOD) to maximize usable capacity.

Thermal management is handled by air cooling, ensuring stable operation within 0°C to 50°C ambient conditions. Communication is supported via CANBUS and Modbus TCP/IP, enabling seamless integration with grid management platforms. Housed in a standard 20-foot container (6,058×2,438×2,896 mm) weighing 16 tons, this system offers a scalable, pre-engineered solution for utilities and commercial projects requiring reliable, high-capacity energy storage in a compact form factor.

Model number	20-FOOT CONTAINERIZED ENERGY STORAGE SYSTEM
Battery type	LiFePO4
Rated capacity (Ah)	1570
Rated energy (MWh)	1.2
Voltage range (V)	672~864
Rated voltage (V)	768
Efficiency	96%
Depth of discharge	90%
System charging rate	0.5C
System discharge rate	0.5C~1C
Size: L * W * H (mm)	6058•2438•2896
Weight (t)	16
Operating temperature (°C)	0-50
Temperature control method	Air cooling
Altitude (m)	＜2000
Humidity	5%-95%
Battery module configuration	5 pieces of 51.2V 314Ah
Design lifespan (years)	above 15
Combination method	parallel connectionn
Communication mode	parallel connection

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Product Features

01
Advanced Battery Cell Technology

Utilizing Grade A LFP314Ah lithium iron phosphate battery cells with 75 parallel-connected 51.2V modules, total capacity 1570Ah, rated voltage 768V, and total energy of 1.2MWh. Cell-level balancing management ensures capacity variation ≤2%.
02
Highly Integrated All-in-One Design

Adopting a 20-foot standard container integrated design, the battery cluster, BMS, EMS, thermal management, and fire protection systems are prefabricated into a single unit. Factory pre-commissioning requires only external electrical connections on site.
03
Intelligent Air Cooling Thermal Management System

A containerized intelligent air cooling system with multi-stage temperature control strategy efficiently dissipates heat generated by the 1.2MWh battery cluster during 0.5C-1C charge/discharge cycles, maintaining temperature differences across the entire cluster at ≤3°C.
04
Grid-Level Communication Interface

Supporting CANBUS/Modbus TCP/IP communication protocols, it can be directly connected to grid dispatch systems for participation in AGC frequency regulation, demand response, and other ancillary services.

Product Advantages

High Energy Density, Land Saving

1.2MWh in 20ft container, 80kWh/㎡, 20% higher density, economical for large plants.

96% Efficiency, Multiplied Returns

96% system efficiency, 15% more revenue over 10 years.

Multi-Functional, Peak Shaving and Frequency Regulation

0.5C-1C adjustable, suits 2h peaking and 1h fast frequency response.

15-Year Lifespan, Solar-Aligned

15 years design life, degradation <2% annually, no battery replacement.

FAQ

About Zhongyue?

Zhongyue Energy Storage is located in Hefei, Anhui, a hub for new energy in China. We are a high-tech enterprise specializing in integrated photovoltaic and energy storage solutions. Integrating R&D, production, sales, and service, we are committed to providing global customers with safe, efficient, and stable energy storage products and system services. We are your reliable partner on the path towards energy independence and sustainable development.
What application scenarios are suitable for the 1.2MWh capacity? How do I choose between this and the 40-foot 2.4MWh version?

The 1.2MWh / 20-foot container is ideal for: Medium-scale commercial projects: Shopping malls, industrial parks, EV charging stations with 500–1,000 kW peak loads. Community energy storage: Microgrids or virtual power plant (VPP) nodes for residential clusters. Renewable integration: Pairing with 1–2 MW solar or wind installations. Grid support: Frequency regulation or peak shaving for distribution feeders. Choose the 20-foot version when space is limited, transport access is constrained, or when modular deployment is preferred (e.g., start with 1.2 MWh and add more containers later). Choose the 40-foot version when higher capacity per footprint is needed or when fewer interconnection points are desired for larger projects.
What payment methods do you accept?

100%T/T in advance or 30% T/T deposit, and the balance 70% paid before shipment.
How can I trust you? What if you don't ship after payment?

We are a physical factory located in Hefei, China, legally registered and verifiable in the Chinese business registry. Our website is also ICP-licensed and officially recorded. To build trust, we can provide real-time factory video or video calls at any time.