3kW 5kW 4kW Solar Inverter for Home

3kW 4kW 5kW Solar Off Grid Inverter Low Frequency

Pure Sine Wave Output
Safeguards sensitive electronics with stable, clean power.
98% MPPT Efficiency
Optional 60-120A controller optimizes solar charging for Lithium/lead-acid batteries (BMS included).
Robust Protection
Overload/voltage safeguards, auto-restart, and transformer reliability.
Smart Automation
WiFi/GPRS monitoring + auto-generator start during outages.
Adaptable Design
Adjustable 110V/120V output, selectable charge currents, and power-saving modes.

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NK-UD3024AMT

NK-UD4024AMT

NK-UD5024AMT

AC Input Voltage:220VAC
Output Power: 3000VA/2400W
Maximum Solar Charging Current:60A
Output Wave: Pure sine wave
Battery Voltage: 24/48VDC
IP Grade: IP20
Dimensions: 512*320*136mm
MPPT Efficiency: >98%
Solar Charge Controller: Optional MPPT/PWM30A-60A

AC Input Voltage:220VAC
Output Power: 4000VA/3200W
Maximum Solar Charging Current:60A
Output Wave: Pure sine wave
Battery Voltage: 24/48VDC
IP Grade: IP20
Dimensions: 512*320*136mm
MPPT Efficiency: >98%
Solar Charge Controller: Optional MPPT/PWM30A-60A

AC Input Voltage:220VAC
Output Power: 5000VA/4000W
Maximum Solar Charging Current:60A
Output Wave: Pure sine wave
Battery Voltage: 24/48VDC
IP Grade: IP20
Dimensions: 512*320*136mm
MPPT Efficiency: >98%
Solar Charge Controller: Optional MPPT/PWM30A-60A

Why Choose

Designed for reliability and efficiency, this pure sine wave inverter ensures clean power for sensitive devices while achieving 98% MPPT efficiency to maximize solar energy. Compatible with lead-acid and lithium batteries (BMS-supported), it offers adjustable charging currents, auto-generator startup, and remote monitoring via WiFi/GPRS. Built-in protections and auto-restart ensure safety, while its dual AC output (110V/120V) and “Power Saving Mode” adapt to diverse off-grid needs.
Application

The NK-UD series solar inverter is perfect for a wide range of applications, such as households, earthquake monitoring, forest fire detection, weather stations, telecom stations, and network setups. Power-saving modes ensure safe, adaptable power for homes, farms, and remote sites.
In Stock & Ready to Ship

Namkoo’s 3kW, 4kW, and 5kW Low Frequency Off-Grid Inverters are available in stock and ready for fast delivery. We maintain a large inventory of various models to support flexible OEM and ODM customization, making us an ideal partner for distributors and agents. For higher power requirements, we also offer an expanded 6kW–11kW off-grid inverter series. Contact us today to discuss partnership opportunities and reliable supply solutions.
COMPANY INTRODUCE

Guangdong Namkoo Power Co.,Ltd. have more than 15 years factory experience for solar power products, power inverter pure sine wave products, solar battery storage,solar appliance products.More than 3000 successfully case have installed in 100+ countries.Germany technology, China price, Global service. Sincerely welcome everyone JOIN US and develop solar business.
FAQs

Q

Are you factory?

Namkoo is the solar & ESS manufacturer specialized in energy storage system, solar battery and solar inverter over 10 years. Apart from it, we can also provide ODM and OEM services of solar energy system for our customers. You could kindly leave your contact on our company website, so we could send you our factory video.

Q

Where is your factory? Can I visit your factory?

Located in Guangdong Province, China. Yes sure, we can arrange and make an appointment in advance for you.

Q

Can send me a sample for free?

Yes, you could kindly purchase and pay it first, we will reduce this cost on your next order.

Q

Do you accept OEM?

Yes.

Q

What is the difference between MPPT controller and PWM controller?

The MPPT controller has Max.PV open circuit voltage reach 150VDC, charging efficiency 30% higher than PWM, automatically match various voltage of 12V/24V/48V.

The PWM controller is weight light, intelligent and economic, automatically match various voltage of 12V/24V.

Q

What is the difference between high frequency inverter and low frequency inverter?

High frequency means from about 300Hz down to 50Hz, low frequency is from 0Hz up to 50Hz.

Low frequency inverter comes with large power transformer, stronger and good for loading those home appliances which build-in motor, such as refrigerators, air conditioners, water pumps, etc. High frequency inverter has a small volume, light weight, economic and high efficiency.

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