The Energy Storage System WTB-4K/4S-A is a compact lithium-based energy storage unit designed to store electrical energy and provide structured energy management within a standalone or hybrid system. Based on the product image, the unit adopts a vertical cabinet structure with a reinforced outer shell and a front-mounted circular display interface showing key identifiers such as 12.8V, 314Ah, and 4kWh. The enclosure integrates side connection access and a wheeled base, enabling stable placement while allowing flexible positioning during installation. The external design maintains a closed and clean surface without visible front fasteners, ensuring a structured and consistent appearance.
From a user experience perspective, the system is designed to provide clear operational visibility and efficient interaction. The front display allows users to directly observe system status without requiring external monitoring tools. Communication interfaces and mobile application support enable remote access to system data, allowing users to track performance and status in real time. The compact size combined with a 4 kWh capacity ensures a balance between storage capability and installation convenience. The wheel-supported base enhances mobility, while the structured enclosure ensures stable operation. The system enables users to manage stored energy efficiently with direct visual feedback and remote monitoring access.
| Model | WTB-4K/4S-A |
| Cell | |
| Cell Chemistry | LiFePO4/C |
| Module | |
| Nominal Capacity (Wh) | 4K |
| Nominal Voltage | 12.8V |
| System | |
| Operating Voltage Range | 11.2V-14.5V |
| Standard Charging Current (A) | 60 |
| Max. Charging Current (A) | 100 |
| Continuous Discharge Current (A) | 100 |
| Peak Discharge Current (A) | 200 |
| Cycle Life (cycles) | 6000 |
| Self-discharge Rate | ≤3%/month |
| Operating Environment | |
| Charging Temperature (℃) | 0-45 |
| Discharging Temperature (℃) | -75 |
| Storage Temperature (℃) | -55 |
| Storage Humidity (RH) | 5-95% |
| Protection | |
| Overcharge Protection Voltage | √ |
| Over-discharge Protection Voltage | √ |
| Overcurrent Protection | √ |
| Short Circuit Protection | √ |
| Temperature Protection | √ |
| Active Balancing | 0.6A |
| Communication & Display | |
| CAN / RS485 / RS232 | |
| Mobile APP | √ |
| Display | 3.2" |
| Appearance | |
| Dimensions (Including Footmaster Wheels) | 440*440*250mm |
| Weight (Including Footmaster Wheels) | 41kg |
Use Brand-Name A Battery Cells (if Any Non-A Cells Are Found, Please Report Them). The Cell Design Life Is 8,000 Cycles @ 80% DOD
Using The Well-Known Brand BMS, The Entire Series Features Active Currentbalancing With Small Currents, Ensuring That The System Can Extend Its Servicelife By 20% In Normal Environments (compared To Our Non-Active Balancingsystem)
Ouchscreen Design, No Screws On The Front, Elegant And Stylish
Built-In Aerosol To Eliminate Safety Hazards
485/232 Communication
Support Viewing Of The APP
In off-grid or remote environments, the system provides a reliable energy storage solution capable of maintaining stable power supply without grid dependency. The 4 kWh capacity ensures sufficient energy availability for daily operations, while the low self-discharge rate ensures energy retention over extended periods. The system can operate under varying environmental conditions, maintaining stable performance. Remote monitoring capability allows users to access system data without being physically present, ensuring that energy management remains controlled even in isolated locations.
For small office environments, the system provides stable energy storage to support essential equipment such as computers, routers, and lighting systems. The 4 kWh capacity ensures that operations can continue during power interruptions without disruption. The system maintains stable voltage output, ensuring that sensitive electronic devices operate reliably. Communication interfaces allow integration with monitoring systems, enabling centralized tracking of energy usage and improving operational efficiency within office environments.
Telecommunication systems require continuous and stable power supply, and the system supports this requirement with consistent energy storage performance. The high current capability allows the system to handle sudden load increases, ensuring uninterrupted operation of communication equipment. The ability to monitor system status remotely ensures that operators can maintain performance without frequent site visits. This improves system reliability and reduces maintenance requirements in telecom installations.
As part of a backup energy system, the unit ensures that stored energy is available during unexpected power interruptions. The structured capacity allows the system to deliver consistent power over extended periods, while the long cycle life ensures reliability across repeated backup events. The integrated display provides real-time system status, allowing users to verify readiness at any time. This ensures that the system can respond effectively to power disruptions without performance degradation.
