Why does my voltmeter only show 70-80V when testing the inverter output, while the inverter screen shows 120V?

This is not a defect or malfunction. The issue is likely because your voltmeter isn’t using the correct measurement mode. This is a modified sine wave inverter, so make sure your voltmeter supports RMS or True RMS (TRMS) mode for accurate readings.

My appliance is under 4000W, but it still doesn't work properly. Why?

Please ensure 1.Your battery capacity is large enough (200AH or more is recommended). 2.You have connected both sets of cables. 3.If you do both and it still doesn’t work, please tell us directly — we’ll help resolve the issue within 24 hours!

What size inverter should I buy?

Always choose an inverter with a higher power rating than your appliances. If your coffee machine is 2000W, a 3000W or 4000W inverter would be a good choice. Not sure? Feel free to tell us for professional advice.

Can I use the inverter while charging the battery at the same time?

No. The charger’s voltage is usually higher than the battery’s, which can trigger the inverter’s over-voltage protection if used simultaneously.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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LVYUAN 4000 Watt Power Inverter 24V to 110V 120V for Vehicle, Solar Inverter System, Heavy Duty, RV, Truck, Off Grid,Camping with 4 AC Outlets, LCD Display, Wireless Remote Control, Car Power Inverter

Product ID: 696352327

⚡4000W continuous power output

📟Real-time LCD performance monitoring

🔌4 versatile AC outlets + hardwire terminal

Description

⚡ Power your adventure with confidence — anytime, anywhere!

SAFETY FIRST ALWAYS - Comprehensive protections guard against overload, overheating, short circuits, and voltage irregularities.
STAY IN CONTROL REMOTELY - Wireless remote lets you manage your power inverter from anywhere in your vehicle or campsite.
PLUG IN POWER UP ANYWHERE - Four AC outlets plus hardwire terminal for ultimate appliance connectivity on the go.
UNLEASH 4000 W OF PURE POWER - Heavy-duty 24V to 110/120V inverter perfect for RVs, trucks, and off-grid living.
SMART COOLING SILENT STRENGTH - Intelligent fan activates only when needed, ensuring quiet, efficient operation under heavy loads.

The LVYUAN 4000W Power Inverter converts 24V DC to 110/120V AC with a continuous output of 4000 watts and peak of 8000 watts. Designed for heavy-duty use in RVs, trucks, solar systems, and off-grid setups, it features 4 AC outlets, a hardwire terminal, real-time LCD display, wireless remote control, and smart cooling fan. Multiple safety protections ensure stable, reliable power delivery for all your mobile energy needs.

Specifications

ASIN	B0DCJZKNXF
Best Sellers Rank	#2,105,462 in Automotive ( See Top 100 in Automotive ) #1,807 in Power Inverters #12,294 in Car Audio & Video Accessories
Brand	LVYUAN
Color	Black
Customer Reviews	1.5 out of 5 stars 2 Reviews
Efficiency	90%
Electrical Output Waveform	Modified Sine Wave
Energy Specifications Met	UL
Frequency	60 hertz
Input Voltage	12 volts
Manufacturer	Guangzhou LVYUAN Technology Co., Ltd.
Model Number	LY-MSW4000W-24V
Number of Items	1
Number of Outlets	4
Output Power	4000 watts
Output Voltage	110 volts, 12 volts, 120 volts, 220 volts
Peak Output Power Watts	8000
Standby Power Shutoff	90%
Total Power Outlets	4

Reviews

D**T

It broke after 3 days

It broke 3 days after I got it and of course they're going to be slow on a refund

24.08.2026

J**S

Faulty

It's a ok product, but remote does not work

21.08.2026

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