Smart AC® 400W USB+ (MSW)


SKU: EL2003-5

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36 Years

Our most versatile and very affordable inverter. "Smart AC" means you simply connect to a DC socket and power is ready at your fingertips!

This item has been discontinued and replaced by the SLIMLINE AC INVERTER 500 WATT

Smart AC® 400W USB+
The Smart AC 400W USB+ Inverter is the ideal solution to your vehicle’s power needs. With 400 Watts of continuous TrueRated power, a surge capability of up to 1000 Watts, and two USB Power ports, the Smart AC 400W USB+ can power most of your 110V AC appliance and USB Power needs!

Where to Use
The Smart AC 400W USB+ is ideal for Cars, Trucks, Campers, SUVs, RVs, Boats, or anywhere there is a DC socket. The 400 watt inverter easily converts your vehicle’s DC power into AC power. Even if you are not using the AC outlets on the Smart AC 400W USB+, the twin USB Power Ports are ideal for charging your cellphone, smartphone, tablet, wearables, GPS, radios, or nearly any other USB powered devices.

How to Use
The design of the Smart AC 400W USB+ is universal in that it can be placed nearly anywhere that is dry, clean, and has sufficient ventilation. Inside of your vehicle, camper, boat, or RV, simply plug the DC power cord into the cigarette lighter receptacle and turn the Smart AC 400W USB+ on. When using the DC power cord, the Smart AC 400W USB+ will be able to provide up to 180 watts of power (limited by your vehicles DC receptacle output; check with your vehicle manufacture to get the exact specifications). To obtain the full 400 watts of power, connect the alligator clip power cord (included) to your Smart AC 400W USB+ and then clamp the alligator clips directly to your battery. Once connected, turn the power switch on the Smart AC 400W USB+ to the “on” position and connect your AC powered device.

Safety First
We all want powerful devices, but first and foremost, we want them to be safe. We have families too, and Wagan Tech whole-heartedly believes in the safety aspect of our products. The Smart AC 400W USB+ includes: Over-Voltage, Over-Load, Short-circuit, Low-Voltage, and High Temperature protections built-in. Rest assured that your family is getting a device that is powerful and safe for them to use!

TrueRated Power™
TrueRated Power is Wagan Tech’s coined term for truth in advertising and performance. While actual output wattage of competitor’s inverters varies greatly, Wagan Tech inverters help consumers to understand and trust that the number printed on the inverter is the actual output of the device. Nearly all of Wagan Tech’s Inverters feature TrueRated Power. Simply put, our inverters are tested at full load and will sustain that continuous load for 24 hours at the wattage printed on the inverter. For example, our Smart AC 400W USB+ will run for 24 hours straight with a 400 Watt load. Our competitors claim “continuous wattage” when in fact most are only rated at 20 minutes of “continuous” wattage. After 20 minutes, the competitor’s output wattage will drop down by as much as 25% of their claimed wattage (in a 400 watt inverter, that can be a 100 watt loss!). Wagan Tech builds our inverters with high peak surges that allow up to 3x the continuous rating to support high surging appliances such as tools, microwaves, air conditioners and refrigerators. Wagan Tech uses top quality components and reliable MOSFET transistors – the key factor in reliable inverter manufacturing.


Quick List of Features

    • 2 – AC outlets

    • 2 – USB Power Ports, 2.1A*

    • 400 Watt TrueRated Power Inverter

    • Surge Power: 1000W

    • DC Powered

    • On/Off Switch

    • Compact Size: 6.0 x 4.25 x 2.0 (in.)

    • DC cable (included) length: 30 inches

    • Alligator Clips cable (included) length: 30 inches

* 2.1A per USB Power port if only one port is used. If both ports are being used, 2.1A is shared between them.


Is this the Right Inverter for You?
If you are having trouble deciding which inverter is right for your power needs or are having trouble understanding the confusing inverter wording, check out our inverter blog to help get a better grasp on what it is that you are looking for!
Wagan Tech Inverter Blog - Understanding Inverters and How-to Select one that is right for you


About Wagan Corporation
Headquartered in Hayward, CA, Wagan® is a leader in development and manufacturing high-tech products such as power inverters, portable power supplies, fitness equipment, solar power units and other consumer/mobile electronic accessories. Wagan Corporation strives to maintain high quality products while keeping the price reasonable; providing affordable power to people on-the-go. As a global supplier of automotive accessory products and lifestyle accessories, quality and customer satisfaction are always our top priorities.


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