Zero CO2

Delta UM

Delta UM
Delta UM

Delta UM Series - Energy Storage Inverter

Flexible Communications
• Integrated LCD display.
• Built-in bluetooth communication.
• Remote control & firmware upgrade.

• Configurable AC/solar input priority based on applications.
• Parallel operation up to 10 units (50kW).
• Support 3 phase unbalanced parallel operation.
• Intelligent EMS function.

High Performance
• 80 Amp AC charger and 100 Amp solar charger.
• Maximum PV input voltage up to 500VDC.
• Built-in MPPT solar charge controller.

Battery Friendly
• Compatible with all top-tier brands of lithium batteries and lead-acid batteries.
• Battery equalization for increased battery performance and lifespan.
• Functional with or without a battery.
• One-click fast charging mode.
• Manual wakeup the overdischarged battery to extend battery lifespan.


MODEL Delta UM 4K-48 Delta UM 4K-48 Top Delta UM 5K-48 Delta UM 5K-48 Top
Parallel Capability No Yes, 10 units No Yes, 10 units
Rated Battery Voltage 48 V
Battery Type Li-ion / Lead-acid
Maximum Charge / Discharge Current 100 A
Communication CAN / RS-485
Rated Output Power 4 kVA / 4 kW 5 kVA / 5 kW
Rated Output Voltage 230 V ± 1%
Rated Frequency 50 Hz / 60 Hz ± 0.1%
Surge Capacity 8 kVA 10 kVA
Output Voltage Waveform Pure sine wave
Transfer Time 10 ms typical, 20 ms Max
THDv (@linear load) <3%
Peak Efficiency (PV-AC) 96.7%
Solar Chager Type MPPT
Recommended Maximum PV Power 5 kW 5.5 kW
Maximum Input Voltage 500 V
MPPT Voltage Range 90 - 480 V
MPPT Number / Maximum Input Strings Number 1 / 2
Maximum Input Current per MPPT 26 A(1)
Maximum Solar Charge Current 100 A
Rated Input Voltage 230 V
SelectableVoltage Range 90 - 280 V
AC Frequnence Range 50 Hz / 60 Hz (Auto sensing)
Maximum AC Charge Current 60 A 80 A
Output over Voltage Protection Yes
Output over Current Protection Yes
Short Circuit Protection Yes
Surge Protection Yes
Temperature Protection Yes
Integrated AFCI (DC Arc-fault Circuit Protection) Yes
Dimensions (W*H*D) 335*450*160 mm
Weight 14 kg
Relative Humidity 5% to 95% (Non-condensing)
Operating Ambient Temperature Range -10 ~ +60°C
Storage Temperature Range -25 ~ +60°C
Ingress Protection IP21
Maximum Operation Altitude 2000 m
Safety Standard IEC 62109, IEC 61000
DC Connection Terminal connectors
AC Connection Terminal connectors
Display LCD
Communication CAN, BMS, RS-485, Dry-contact, Bluetooth, Optional: Wi-Fi

(1) Max. input current per string will be 26A for one string's design and 13A for two strings' design;
Max. input short current per string will be 32A for one string's design and 16A for two strings' design.

Product specifications are subject to change without further notice.