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The 28kWh off grid energy storage system is a high-capacity lithium iron phosphate (LiFePO4) power solution designed for data center backup, commercial facilities, and off-grid energy independence. It delivers stable, uninterrupted power support during grid failure or peak load conditions. Built with modular stacked architecture and intelligent energy control, it ensures continuous operation for critical systems requiring high reliability and fast response.
- Rated Voltage：204V (172.8-230.4V)
- Rated Capacity：140Ah
- Continuous Charging Current：30A
- Continuous Discharge Current：30A
- Size：640 × 700 × 907 mm ±1mm (Excluding folded edges)
- Weight：252 kg ±1 kg
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Overview
28kWh Off Grid Energy Storage System Structural Overview
Engineers construct the 28kWh off grid energy storage system using a modular lithium battery cluster architecture. First, they assemble multiple battery modules into series and parallel configurations to form a stable high-capacity DC energy bank. Then, technicians install each module inside a reinforced metal cabinet and secure it with insulated brackets to ensure structural stability during operation and transportation. Meanwhile, cell matching is performed before assembly to reduce voltage deviation and capacity imbalance. After mechanical positioning, the system moves into full electrical integration.
Battery Material System and Internal Composition
Inside each module, a lithium-ion chemistry system is applied. The cathode typically uses lithium metal oxide coated on aluminum foil, while the anode is made of graphite carbon material on copper foil. In addition, a microporous polymer separator is placed between electrodes to prevent short circuits while allowing ion transfer. Furthermore, the electrolyte consists of lithium salt dissolved in organic carbonate solvents, with strict moisture control before sealing. Meanwhile, the outer enclosure adopts a metal cabinet structure to ensure mechanical protection and environmental resistance.
Application Scenarios and Industry Use Cases
The 28kWh off grid energy storage system is commonly configured for residential solar storage systems, commercial building backup power setups, industrial microgrid stabilization, telecom base station energy support, and remote area power supply systems. In addition, it is applied in solar photovoltaic integration projects, small-scale wind energy storage systems, and emergency power continuity installations where grid independence is required.
Testing, Commissioning and Standards Compliance
Engineers perform staged validation including charge-discharge cycling, voltage stability testing, and insulation resistance measurement. Afterwards, long-duration operational tests verify energy efficiency consistency and BMS control accuracy. Finally, the system complies with IEC energy storage safety standards and UN38.3 transportation regulations, ensuring structural reliability, electrical safety, and deployment readiness across application environments.
Product Details
Product Features
- Battery: 204V 140Ah LiFePO4, 172.8–230.4V operating range, 30A continuous charge/discharge, 252kg ±1kg, 640×700×907mm ±1mm
- Inverter: Supports optional power display and Bluetooth monitoring, enabling real-time system status tracking
- PV Input: Compatible with stable power integration systems, ensuring reliable energy supply for continuous industrial
- System Mode: Designed for uninterrupted power support in fisheries equipment, aeration systems, data centers
- Protection: Built-in intelligent lithium protection system with safe charge/discharge control, voltage stability management
Technical Parameters
| Project / Parameter | Main Parameter / Specification |
| Rated Voltage | 204V (172.8-230.4V) |
| Rated Capacity | 140Ah |
| Continuous Charging Current | 30A |
| Continuous Discharge Current | 30A |
| Size | 640 × 700 × 907 mm ±1mm (Excluding folded edges) |
| Weight | 252 kg ±1 kg |
| Optional Features | Power Display, Bluetooth |
| Purpose | Fisheries, aerator equipment, data centers, etc. |
