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# ESS GU 21kWh UPS Lithium Backup Battery

- SKU: ESSGU-21kWh
- Category: Armario de baterías de CC de alta tensión
- Price: ¥0 per Set
- Minimum order quantity: 1 Set
- Lead time: 15-30 days
- Weight: 375kg
- Manufacturer: 中腾微电网解决方案和设备
- URL: http://www.ztvpower.com:443/es/product/essgu-21kwh

## Summary

ESS GU 21kWh UPS Lithium Backup Battery is built on LiFePO₄ cells at 307.2VDC with 21.13kWh stored, delivering up to 110A discharge. It takes over critical loads the instant mains supply fails, for data centres, telecom rooms and industrial UPS retrofits.

## Key features

- LiFePO₄ cells at 307.2VDC battery voltage
- Stored energy 21.13kWh
- Up to 110A discharge for high-rate pulse loads
- Wide voltage window; CAN / RS485 interlock with the UPS host
- Rack-mounted design with modular capacity extension

## Description

The ESS GU series lithium backup battery pairs LiFePO₄ cells with 2C / 4C high-rate discharge, taking over critical loads the moment mains power drops. It suits data centres, telecom rooms, medical sites and industrial UPS hosts.

The ESS GU 21kWh runs at 307.2VDC with roughly 21.13kWh usable, measures 700×700×1450mm and weighs about 375kg. Each cabinet is wired, insulation-tested and function-tested before shipment, so it can be specified and ordered once the load list and local grid requirements are confirmed.

LiFePO₄ cells at 307.2VDC battery voltage

Stored energy 21.13kWh

Up to 110A discharge for high-rate pulse loads

Wide voltage window; CAN / RS485 interlock with the UPS host

## Specifications

- Cell type: LiFePO₄ 磷酸铁锂
- Module configuration: 1P20S
- Number of modules: 6
- Battery voltage: 307.2VDC
- Single cell capacity: 55Ah
- Battery energy: 21.13kWh
- Max. charge current: 27.5A
- Max. discharge current: 110A
- Protection: 过充 / 过放 / 过流 / 过温 / 短路
- Communication: CAN / RS485
- Cooling method: 智能风冷 Air cooling
- Protection level: IP20
- Safety certification: UN38.3, IEC62619
- Storage temperature: 0℃~30℃（25℃ 可存放 6 个月）
- Working temperature: 充电 0℃~+55℃；放电 -20℃~+55℃
- Humidity: 0~95%RH（无凝露）
- Max. operating altitude: <4000m（2000m 以上降额）
- Dimensions (L×W×H): 700×700×1450mm
- Weight: 375kg

## FAQ

### Which UPS applications suit the ESS GU 21kWh pack?

It targets data centres, telecom base stations and equipment rooms, medical equipment, rail transit and industrial-control UPS hosts — for both lithium retrofits of the DC side and new builds replacing lead-acid strings.

### What about high-rate discharge?

This model delivers up to 110A discharge and 27.5A charge, covering short high-current UPS discharge and fast recharge.

### How compatible is it with existing UPS hosts?

Battery telemetry is exchanged over CAN / RS485 and can be opened to the host protocol. Retrofit projects must first verify the UPS DC bus voltage and charge-management logic.

### Space and floor loading?

Rack-mounted cabinet, 700×700×1450mm, roughly 375kg. Confirm floor loading for the planned row layout.

### Custom builds and private labelling?

Capacity, rate, protocol, cabinet appearance and branding can all be customised — contact us for the corresponding lead time.

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Request a quote: http://www.ztvpower.com:443/es/contact?sku=ESSGU-21kWh