€1,080 Tax excluded
Deye SUN-BK250 is a micro hybrid energy storage system with a 2.5 kW micro-inverter (2750 W maximum) and a 2.56 kWh LiFePO4 battery in a single unit. It has 4 MPPT, a maximum efficiency of 96.5 %, IP65 ingress protection and Wi-Fi, Bluetooth and LoRa communication, with a 4 ms grid/off-grid switchover.
Deye SUN-BK250 is a micro hybrid energy storage system that combines a 2.5 kW hybrid micro-inverter and a 2.56 kWh LiFePO4 battery in a single unit. It works grid-connected, off-grid or AC-coupled to an existing balcony PV installation, and installs simply on a standard socket.
The system can operate in three modes: hybrid grid-tied, for self-consumption; off-grid, as a portable power source; and AC-coupled, to turn a balcony PV installation into a system with storage. It offers a wireless zero-export function, 6 programmable charge and discharge time slots and intelligent load control through a smart plug, smart switch or smart EV charger.
The battery can be expanded with up to 5 stacked Deye AE-F2.56 modules and up to 8 stacks (40 modules), and up to 3 units can be connected in parallel (7.5 kW). The operating temperature is -10 ... 55 °C, with derating above 45 °C, or -20 ... 55 °C with optional heating. The Deye Cloud app provides remote monitoring and control, and Bluetooth allows local control.
| Product type | Hybrid (micro) inverter with integrated LiFePO4 battery |
|---|---|
| Battery chemistry | LiFePO4 (lithium iron phosphate) |
| Nominal energy | 2560 Wh |
| Capacity class | 2.5-6 kWh |
| Operating voltage range | 44.8-57.6 V |
| Max. battery charge / discharge current | 50 A |
| Rated AC output power | 2500 W |
| Max. AC power (input / output) | 2750 W |
| Peak power (off-grid) | twice the rated power, for 10 s |
| Rated AC current (input / output) | 11.4 A / 10.9 A |
| Max. AC current (input / output) | 12.5 A / 12 A |
| Max. continuous AC passthrough current | 30 A |
| AC voltage and frequency | 220 / 230 V, 50 Hz (45 ... 55 Hz) or 60 Hz (55 ... 65 Hz), L + N + PE |
| Power factor range | 0.8 leading ... 0.8 lagging |
| DC injection current | < 0.5 % of rated current |
| Max. efficiency | 96.5 % |
| European efficiency | 96.0 % |
| MPPT efficiency | > 99 % |
| Number of MPPT | 4 (one string per MPPT) |
| Max. PV input power | 4400 W (-18L variant) or 5760 W (-32L variant) |
| Max. PV input current per MPPT | 18 A (-18L) or 32 A (-32L) |
| Max. PV short-circuit current per MPPT | 27 A (-18L) or 48 A (-32L) |
| Rated PV voltage | 42.5 V |
| Start-up voltage | 25 V |
| MPPT voltage range | 20-55 V |
| Parallel connection | up to 3 units (up to 7.5 kW rated output) |
| Communication interfaces | Wi-Fi, Bluetooth, LoRa |
| Protections | DC reverse polarity protection, AC output overcurrent, overvoltage and short-circuit protection, thermal protection, insulation impedance detection, anti-islanding protection |
| Surge protection | type II (DC) and type II (AC) |
| Ingress protection (IP) | IP65 |
| Operating temperature | -10 ... 55 °C, derating above 45 °C (-20 ... 55 °C with optional heating) |
| Max. relative humidity | 95 % (non-condensing) |
| Max. operating altitude | 2000 m |
| Standards and compliance | VDE 4105, IEC 61727/62116, VDE 0126, AS 4777.2, CEI 0-21, EN 50549-1, G98, C10-11, UNE 217002 |
| Dimensions (height x width x depth) | 326 x 526 x 210 mm |
| Weight | 32 kg |
We took these technical data from the manufacturer’s datasheet; transcription errors are possible. For 100% accuracy, please consult the attached datasheet.
Compatibility is calculated automatically from the manufacturers’ technical data and is for information only. For complex systems, we recommend having the configuration checked by a consultant before ordering. Details in the Terms and conditions
