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Deye SUN-BK250-2.56KWH-EU-AM4-32L All-in-One Hybrid System 2.5 kW 2.56 kWh
The Deye SUN-BK250-2.56KWH-EU-AM4-32L is not an ordinary string inverter but a compact integrated storage system: a single IP65 enclosure houses a 2.5 kW single-phase hybrid inverter and a 2.56 kWh LiFePO4 battery. It converts the energy from the PV modules into 230 V AC, charges the battery and regulates the exchange with the grid, with a zero export function controlled wirelessly.
It is intended for balcony systems, small residential users and portable applications: it connects to a standard domestic socket and works in grid-connected hybrid, off-grid or AC-coupled mode to add storage to an existing balcony system with microinverters. PV input up to 5,760 W across 4 independent MPPTs, grid/off-grid switchover in less than 4 ms for UPS-grade backup. Up to 3 units in parallel (7.5 kW) and capacity expandable with external battery modules from the same family.
Key features
Technical specifications
| Feature | Value |
|---|---|
| Product code | SUN-BK250-2.56KWH-EU-AM4-32L |
| Type | Single-phase hybrid micro storage system (integrated inverter + battery) |
| Rated AC power | 2,500 W |
| AC output | Single-phase L/N/PE, 220 / 230 V, 50 Hz (45-55 Hz) or 60 Hz (55-65 Hz) |
| Maximum AC current | 12.5 / 12 A |
| Maximum PV power | 5,760 W |
| Number of MPPTs | 4 (1 string per MPPT) |
| MPPT voltage range | 20 - 55 V |
| Rated PV voltage | 42.5 V |
| Start-up voltage | 25 V CC |
| Maximum PV input current | 9.1 / 8.7 A |
| Maximum PV short-circuit current | 10 / 9.6 A |
| Battery capacity | 2.56 kWh (2,560 Wh) |
| Battery cell chemistry | LiFePO4 |
| Battery voltage | 44.8 - 57.6 V |
| Maximum charge / discharge current | 50 A |
| Maximum efficiency | 96.5 % |
| Grid / off-grid switching time | ≤ 4 ms |
| Units in parallel | up to 3 (7.5 kW) |
| Protection degree | IP65 |
| Communication | Wi-Fi, Bluetooth, LoRa |
| Operating temperature | -10 - +55 °C |
| Dimensions | 560 × 330 × 210 mm |
| Weight | 30 kg |
| Warranty | 10 years |
Documentation
PDFDatasheetOfficial manufacturer documentInstallation and wiring must be carried out by qualified personnel in accordance with the applicable standards and the electrical design of the system.