Day battery energy storage system

Day

C&I Outdoor ESS (215 kWh)

Industrial-grade energy storage, engineered for reliable performance in demanding commercial and industrial environments.

Overview

Industrial-grade storage all in one cabinet.

A high-density, outdoor-rated all-in-one energy storage cabinet engineered for industrial parks, commercial complexes, and demanding operations. Delivering 215 kWh of nominal capacity with an integrated 100 kW PCS, intelligent liquid cooling, aerosol fire suppression, and IP54-rated weatherproof construction.

Designed for demanding operating environments, this all-in-one cabinet features a 768V LFP battery system with 672–864 Vdc operating range and intelligent forced-air PCS cooling. Operating reliably from -20 to +50°C with C3 anti-corrosion rating, this is industrial energy storage built for facilities that never stop.

Day product overview
Specifications

Technical Specifications.

215kWh
Nominal Capacity

High-density all-in-one cabinet for commercial and industrial facilities.

100kW
Integrated PCS

Built-in power conversion system for seamless grid-tied operation.

768V
Rated Voltage

Optimised high-voltage architecture with 672–864 Vdc operating range.

Container Specs Sheet

Battery
Chemistry
LFP (LiFePO4)
Cell Specification
3.2V / 314Ah
Combination
1P240S
Nominal Capacity
215 kWh
Rated Voltage
768 V
Voltage Range
672 - 864 Vdc
Max Charge / Discharge Current
182 A
Cooling
Liquid cooling
Fire Protection
Aerosol
System
Dimensions (W x D x H)
1300 x 1300 x 2300 mm
Integrated PCS
100 kW
Anti-Corrosion Grade
C3
Operating Temperature
-20 to +50°C (derating >45°C)
Humidity
≤95% (non-condensing)
AC Output
400Vac / 50Hz / 3-phase 4-wire
Altitude
≤4000m (derating >2000m)
PCS Cooling
Intelligent forced-air
Protection Rating
IP54
Communication
Interfaces
CAN, RS485, Ethernet (Modbus-TCP)
Cloud Monitoring
4G (optional)
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Features

Built for Performance

Cut Demand Charges

Shave peak loads and arbitrage energy prices to lower utility bills and deliver fast, predictable payback.

Always-On Reliability

Seamless UPS-grade switchover protects production lines and critical loads from costly downtime.

Multi-Layer Safety

LiFePO4 cells, cell-level BMS, and integrated fire detection/suppression meet UL 9540 / NFPA 855 for safe on-site deployment.

Modular & Scalable

Modular cabinet design scales from kWh to MWh, with hot-swappable components for expansion and zero-downtime maintenance.

Features

Explore other Configurations

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Residential ESS (5-25 kWh)

A stackable lithium iron phosphate (LFP) battery system designed for residential solar-plus-storage applications, built to last over 20 years.

Capacity:5–25 kWh
Cooling:Natural
Rated:IP65
Learn More

Ready to power your project?

Whether you need a residential unit or a utility-scale deployment, our team will help design and configure the right solution for your requirements.