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In today’s rapidly evolving energy landscape, reliable and efficient storage solutions are no longer a luxury—they are a necessity. Introducing the ONESUN ECO W Series, a cutting-edge wall-mounted low-voltage lithium iron phosphate (LFP) battery system, available in W-25.6V150Ah/200Ah and W-51.2V150Ah/200Ah models. Designed for both residential and light commercial applications, this series redefines what you can expect from decentralized energy storage.
The ECO W Series leverages premium LFP battery cells combined with an intelligent smart Battery Management System (BMS). In specific application scenarios, it supports continuous 1C charge and discharge, delivering robust power on demand without derating. Whether you are shaving peak loads, backing up critical equipment, or maximizing self-consumption from solar PV, the W-series ensures your energy is ready when you need it most.
Worried about integration with your existing inverter? The ECO W Series is designed to be universally compatible with most single-phase inverters on the market. This plug-and-play compatibility minimizes installation headaches and makes upgrading your current system effortless.
Safety is non-negotiable. That’s why we built a three-level adjustable protection mechanism: Warning, Protection, and Deep Protection. This comprehensive safety architecture continuously monitors voltage, current, and temperature, intervening at the earliest sign of abnormality. From overcharge to short-circuit risks, the Triple-Layer Safety Armor keeps your home, clinic, or retail space secure.
Battery degradation is a thing of the past with our proprietary Dual Balancing Technology, which actively combines active and passive balancing. This intelligent approach delays cell aging, maintains capacity consistency, and ensures long-term stability. The result? More usable cycles and a lower total cost of ownership over the system’s lifetime.
Energy demands change. The ECO W Series supports parallel expansion, allowing you to start small and scale up as your needs grow. Add more units to increase total capacity without replacing existing hardware—ideal for households, schools, hospitals, retail stores, and small-to-medium commercial and industrial businesses.
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🔧 Technical Data Sheet — High Performance Series for Residential & Commercial
| Model | W-25.6V150Ah | W-25.6V200Ah | W-51.2V150Ah | W-51.2V200Ah |
|---|---|---|---|---|
| Cell Type | LiFePO₄ (Lithium Iron Phosphate) | |||
| Nominal Capacity | 150Ah | 200Ah | 150Ah | 200Ah |
| Energy | 3.84 kWh | 5.12 kWh | 7.68 kWh | 10.24 kWh |
| Nominal Voltage | 25.6V | 51.2V | ||
| End-of-charge Voltage | 29.2V | 58.0V | ||
| End-of-discharge Voltage | 20.2V | 42.0V | ||
| Max. Charge Current | 100A | |||
| Max. Continuous Discharge Current | 100A | |||
| Max. Instantaneous Discharge Current | 100A | |||
| Overcurrent Protection | 120A | 120A | 120A | 220A |
| Ingress Protection | IP50 | |||
| Warranty | 3 years | |||
| Cycle Life | ≥3500 cycles @ SOH ≥80% & 0.5C, 25°C | |||
| Balancing | Active & passive balancing | |||
| SOC Estimation | Yes (high accuracy) | |||
| Intelligent Balance | Yes | |||
| Master-Slave Operation | Yes (parallel expansion ready) | |||
| Sleep & Wake-up | Auto / Manual wake-up supported | |||
| Protection Function | Over-charge, Over-discharge, Over-current, Short-circuit, Over-voltage, Under-voltage, Over-high/low temperature | |||
| Communication Interface | RS485 / CAN / RS232 / Bluetooth (Optional) | |||
| Communication Protocol | Compatible with 12+ leading inverter brands worldwide | |||
| Operating Temperature | Charging: 0°C ~ 55°C ; Discharging: -20°C ~ 55°C | |||
| Storage Temperature | -30°C ~ 60°C | |||
| Storage Humidity | ≤90% RH (non-condensing) | |||
| Standard Environmental Condition | Temperature: 25°C ± 2°C ; Humidity: 45% ~ 75% RH ; Atmospheric Pressure: 86kPa ~ 106kPa | |||
| Dimensions (W*H*D) | 392*365*155 mm | 567*393*154 mm | 567*393*154 mm | 870*465*145 mm |
| Net Weight | Approx. 25 kg | Approx. 40 kg | Approx. 40 kg | Approx. 82 kg |
| Gross Weight | Approx. 28.5 kg | Approx. 43.5 kg | Approx. 43.5 kg | Approx. 99 kg |
| Certification | CE, UN38.3, MSDS, RoHS compliant | |||
📋 ONESUN® Professional Energy Storage | Built-in intelligent BMS with active & passive balancing, master-slave parallel support, and multi-protocol communication (RS485/CAN).
✔️ Data based on standard test conditions (25±2°C). Specifications subject to continuous improvement. 🔋 Cycle life guarantee: ≥3500 cycles @ 80% DoD, 0.5C rate — reliable backup & daily cycling.
Models: W-25.6V150Ah / 200Ah; W-51.2V150Ah / 200Ah
Chemistry: Lithium Iron Phosphate (LFP)
Continuous Rate: 1C charge/discharge (scenario-dependent)
Protection Levels: 3-tier adjustable (Warning, Protection, Deep Protection)
Balancing: Active + Passive (Dual Balancing)
Installation: Wall-mounted, space-saving design
Scalability: Parallel-ready for flexible capacity expansion
From a family looking to reduce electricity bills, to a hospital requiring backup power for life-sustaining equipment, to a retail chain optimizing energy costs—the ECO W Series delivers power, safety, and adaptability in one sleek package. Backed by rigorous testing and a smart BMS that communicates seamlessly with leading inverters, this is the storage solution you can trust for decades.
Power your future with ONESUN. Choose the ECO W Series – where safety meets scalability.
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