

Deye SUN-BK250-2.56KWH-EU-AM4-32L All-in-One Hybrid System 2.5kW 2.56kWh
The Deye SUN-BK250-2.56KWH-EU-AM4-32L is an all-in-one micro storage system that packs a 2500W single-phase hybrid inverter and a 2.56kWh LiFePO4 battery into one IP65 body. It is made for balconies, terraces, small roofs and holiday homes: it plugs into a household socket, stores the surplus from the panels and gives it back in the evening, working both on-grid and off-grid with ≤ 4 ms switchover.
It accepts up to 5760W of PV on 4 independent MPPTs, so four panels with different tilts and orientations can be used without mismatch losses. The system is scalable: up to 3 inverters in parallel (7.5kW) and 5 stacked batteries (12.8kWh) per cluster, up to 102.4kWh in a full configuration. Monitoring and control over Wi-Fi, Bluetooth and LoRa with the Deye Cloud app, ≥ 6000 cycles and a 10-year warranty.
Key features
Technical specifications
| Feature | Value |
|---|---|
| Product code | SUN-BK250-2.56KWH-EU-AM4-32L |
| Rated AC output power | 2500W |
| Max. AC output power | 2750W |
| Integrated battery capacity | 2.56kWh (2560Wh) |
| Battery chemistry | LiFePO4 |
| Battery voltage | 51.2V nominal (44.8-57.6V range) |
| Cycle life | ≥ 6000 (25 °C ±2 °C, 70% EOL) |
| Max. PV input power | 5760W |
| No. of MPPT and strings | 4 MPPT, 1+1+1+1 |
| MPPT voltage range | 20-55V (start-up 25 Vdc) |
| Rated PV input voltage | 42.5V |
| PV current per input | 32A (short circuit 48A) |
| Output voltage and frequency | 220/230 Vac, 50Hz (45-55) / 60Hz (55-65) |
| Max. AC output current | 12.5A |
| Single cluster expansion | up to 3 inverters in parallel (7.5kW) and 5 stacked batteries (12.8kWh) |
| Max. system expansion | 8 clusters, 40 batteries, 102.4kWh |
| On-grid / off-grid switchover | ≤ 4 ms |
| Max. efficiency | 96.5% |
| MPPT efficiency | > 99% |
| Communication and control | Wi-Fi, Bluetooth, LoRa; Deye Cloud app and local control |
| Ingress protection | IP65 |
| Dimensions and weight | 526×326×210 mm - 32 kg |
| Operating temperature | -10 to 55 °C (-20 to 55 °C with optional heating) |
| Humidity and altitude | 0-95% non condensing, altitude ≤ 2000 m |
| Protections | DC reverse polarity, AC overcurrent and overvoltage, short circuit, thermal, insulation, anti-islanding, Type II DC and AC surge arresters |
| Certifications | CEI 0-21, EN 50549-1, VDE-AR-N 4105, VDE 0126, IEC 61727/62116, G98, C10-11, UNE 217002 |
| Warranty | 10 years |
Documentation
PDFDatasheet SUN-BK(80-250)-2.56KWH-EU-AM4-(18-32)LOfficial manufacturer documentPDFEU declaration of conformity (refers to the AM2 version)Official manufacturer documentInstallation and wiring must be carried out by qualified personnel in accordance with the applicable standards and the electrical design of the system. Deye requires a Type 2 surge protective device (SPD) on the grid side, to be provided separately.



















































