UD5048 4000W Off-Grid Low-Frequency Solar Inverter

The UD5048 4000W Low-Frequency Solar Inverter is engineered for off-grid residential, marine, and industrial applications requiring high surge capacity. Featuring pure sine wave output, transformer-based design, and MPPT solar charging efficiency up to 98%, it delivers reliable and stable AC power for demanding devices.

With lithium battery wake-up, BMS protocol support, adjustable grid start voltage, automatic restart, and multiple communication options, the UD5048 ensures safe, efficient, and intelligent energy management. It can sustain high-power inductive loads such as water pumps, drills, air conditioners, and heaters.

Key Features

Pure sine wave AC output
MPPT efficiency up to 98% (optional WiFi/GPRS)
Generator auto-start support
Adjustable charging current & grid start voltage
Low-frequency transformer for stable high-load output
Lithium battery wake-up and automatic restart
BMS protocol compatible
DC start & self-diagnosis
Overload protection
Lead-acid and lithium battery models
Sustained high-power output for pumps, drills, AC, and heaters

Applications

Off-grid residential solar systems
Marine/boat power systems
Small industrial workshops
High surge/inductive load applications

Model	UD5048
Input voltage	220V AC/110V AC
Input voltage range	220V:154-264V±3V AC(Normal Mode) 185V-264V±3V AC(UPS Model) 110V:77-132V±3V AC(Normal Mode) 92V-132V±3V AC(UPS Model)
Input Frequency	50/60Hz±5%
Out put power	5000VA 4000W
AC model output Voltage	The output voltage under the mains is thesame as the input voltage
AC model outout frequency	The output frequency under the mains is the same asthe inputfrequency
Battery model output voltage	220V AV +10%
Battery model output frequency	50Hz or 60Hz+1%
Battery model output wave	Pure sine wave
Battery type	External lead-acid battery,Gel battery.water battery or Lithium battery
Battery voltage	48V DC
Battery charging voltage	54.8V DC
Maximum PV array power	24V:1600W
Solar input voltage range	12V:PWM 15V-50V DC 24V:PWM 30V-105V DC
Maximum PV Display open Circuit Voltage	12V:PWM 5OV DC 24V: PWM 105V DC
Maximum solar charging current	60A
Maximum AC Charge Current	40A
Transfer time	s10ms(UPS)/s20ms(INV)
load peak ratio	(MAX)3:1
Operating temperature	0°C~40°C
Relative temperature	-10°C~90°C no condensation
Noise	<45db

Power Frequency Toroidal Transformer Design

Innovative design in the inverter industry featuring a power frequency toroidal transformer
Parallel expansion capability with low no-load loss, less than half of the high-frequency inverter of the same power
Strong anti-interference ability and large overload capacity

Wide Application

Continuous High-Power Output: Guarantees reliable performance for all your devices.
Broad Compatibility: Works with a wide range of appliances, including air conditioners, water heaters, rice cookers, lighting, and electric kettles.
Essential Home Power: Ideal for ensuring the smooth operation of your devices in any environment.

Lithium Battery Wake-up Function

Automatic Lithium Battery Start-up: Powers on seamlessly from the battery.
Smart & Safe Charging: Designed for safety and peace of mind.
Zero Activation Required: Fully operational for immediate use after charging.
Hands-Off Recovery: Automatically detects power restoration, charges, and reboots.