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| Code: | 170-091 |
| Model: | AI-W5.1-8P3-EU-B |
| Product warranty (months): | 120 |
| Brand: | Deye |
Description
The Deye AI-W5.1-8P3-EU-B is an 8 kW three-phase low-voltage All-in-One residential energy storage system (ESS) combining a three-phase hybrid inverter with stackable, modular Cobalt-Free Lithium Iron Phosphate ($\text{LiFePO}_4$) battery modules.Designed with a stackable floor-mounted architecture, it connects battery units without external power cabling.Featuring 2 independent MPPT trackers, 100% unbalanced phase output capability, ultra-fast 4 ms UPS backup switching, and smart load/generator management, it provides high energy resilience for residential and commercial applications.
Key Features & Benefits
Integrated Stackable Tower Design:Combines an 8 kW three-phase hybrid inverter with stackable 5.12 kWh battery modules (scalable up to 30.72 kWh per stack) without external battery interconnect cables.
48V Safe Low-Voltage Architecture:Utilizes safe, non-toxic $\text{LiFePO}_4$ battery modules operating at nominal 51.2V with a built-in intelligent BMS for multi-level circuit protection.
Ultra-Fast UPS Backup:Switches seamlessly to emergency off-grid backup mode within 4 ms during grid outages.
100% Unbalanced Output Support: Delivers up to 100% rated output power on individual phases to serve uneven household or commercial electrical load distributions.
Dual MPPT Tracking (2+1 Strings):Equipped with 2 independent MPP trackers (26A + 13A input current) supporting up to 10,400 W of max DC input power.
Massive System Scalability:Supports system expansion up to 36 battery modules in parallel (up to 184 kWh total capacity).
Technical Specifications
| Parameter | Specification |
| Rated AC Output Active Power | 8,000 W (Max. AC Apparent Power: 8,000 VA) |
| Max. DC Input Power | 10,400 W |
| Max. DC Input Voltage | 800 V |
| Start-up DC Voltage | 160 V |
| MPPT Operating Voltage Range | 200 V – 650 V (Full Load: 350 V – 650 V) |
| Max. Operating PV Input Current | 26 A + 13 A (Short Circuit: 34 A + 17 A) |
| No. of MPPTs / Strings per MPPT | 2 / 2+1 |
| Battery Chemistry / Operating Voltage | $\text{LiFePO}_4$ / 43.2 V – 57.6 V (Nominal: 51.2 V) |
| Battery Module Capacity / Usable Energy | 5.12 kWh per module (Configurable 5.12–30.72 kWh) |
| Max. Charging / Discharging Current | 190 A |
| Max. Conversion Efficiency | 97.6% (Battery Charge/Discharge Efficiency: 95.5%) |
| Nominal AC Grid Voltage / Frequency | 220 V / 380 V, 230 V / 400 V (3L+N+PE) / 50 Hz / 60 Hz |
| Enclosure Protection Rating | IP65 (after stacking) |
| Inverter Top Unit Dimensions (W x D x H) | 720 × 255 × 440 mm |
| Inverter Top Unit Weight | ~38.0 kg |
| Communication Interfaces | CAN2.0 / RS485 / Wi-Fi / LAN / App |
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