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M18 18-Volt Lithium-Ion 175-Watt Powered Compact Inverter for M18 Batteries (Tool-Only)

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  • Faster Simultaneous Power
  • Has 1 AC 120V Outlet, 1 USB-C PD (45W) Port, 1 USB-A (2.4A) Port
  • Part of the M18 System, featuring over 200 cordless solutions
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Product Overview

The MILWAUKEE M18 TOP-OFF 175W Power Supply delivers faster simultaneous power to personal devices and small electronics. Attach any M18 battery to provide continuous power or recharge devices with (1) AC 120V outlet, (1) USB-C PD port, and (1) USB-A port. Users can quickly charge up to three devices at the same time, without the barriers of speed throttling. With the USB-C PD port (45W), this battery inverter is capable of recharging devices, from a fully depleted state to 80% capacity, up to 75% faster than conventional wall chargers (5W). The compact portable power supply has an attached metal rafter hook that can be extended to hang it from carts, lumber, or other jobsite materials when worksurface space is limited. Users can instantly set up a mobile workstation or keep electronics securely within eyeshot, rather than making frequent trips to a wall outlet.
  • Includes (1) AC 120V Outlet, (1) USB-C PD (45W) Port, and (1) USB-A (2.4A) Port
  • Fits All M18 Batteries
  • 175W Continuous Watts
  • Ideal for laptops, cellphones, TVs, and other small devices
  • Rafter hooks allows for versatility on the jobsite to hang on common materials or carts
  • Lightweight, compact design
  • Battery, charger, and device cords not included
  • 5 year warranty
  • Shop All Milwaukee Tools
  • Click here for more information on Electronic Recycling Programs

Additional Resources

From the Manufacturer

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M18 18-Volt Lithium-Ion 175-Watt Powered Compact Inverter for M18 Batteries (Tool-Only)
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NameM18 18-Volt Lithium-Ion 175-Watt Powered Compact Inverter for M18 Batteries (Tool-Only)40V 300-Watt Power Inverter (Tool Only)40V 300-Watt Power Inverter (2 Pack)40V 300-Watt Power Inverter with 4.0 Ah Battery
CA (CARB) CompliantCARB CompliantCARB CompliantCARB CompliantCARB Compliant
Running Wattage175300300300
Starting Wattage175300300300
Features3-Prong Plug,On/Off Switch,Overload Protection,Replaceable Battery,Short Circuit Protection,USB PortLow Battery Shutdown,On Indicator Light,On/Off Switch,Replaceable Battery,USB PortLow Battery Shutdown,On Indicator Light,On/Off Switch,Replaceable Battery,USB PortLow Battery Shutdown,On Indicator Light,On/Off Switch,Replaceable Battery,USB Port
Voltage (volts)1840 V40 V40 V
Start TypePush ButtonElectric SwitchElectric SwitchElectric Switch
ApplicationCampsite,Emergency Use,Home Standby,Job Site,Recreation,TailgatingRecreationRecreationCampsite,Job Site,Recreation,Tailgating
View ProductView ProductView ProductView Product



Product Height (in.)
Product Length (in.)
3 in
Product Width (in.)


Campsite,Emergency Use,Home Standby,Job Site,Recreation,Tailgating
Battery Type
Lithium Ion
Built-in inverter
CA (CARB) Compliant
CARB Compliant
Color Family
3-Prong Plug,On/Off Switch,Overload Protection,Replaceable Battery,Short Circuit Protection,USB Port
No Additional Items Included
Number of Outlets
Operational Volume (dB)
Outlet Type
Product Weight (lb.)
1 lb
Running Wattage
Start Type
Push Button
Starting Wattage
Suggested Uses
Mobile Devices,Small Electronics
Voltage (volts)

Warranty / Certifications

Certifications and Listings
ETL Listed
Manufacturer Warranty
5 Year Warranty

Questions & Answers

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Customer Reviews

  • 4.6
    out of 1,106 reviews
  • 82%recommend this product
Filter by:
Showing 1-10 of 1,106 reviews
Great tool, especially for camping
Performed as expected
  • Verified Purchase
Cool but
Its cool and will serve for most things but I like the auto shutoff feature and wish I could disable it . The asf prevents me from using it for what I bought it for and that is why I am not giving it a 5 star. I am a Milwaukee fan boy but if I am powering something as long as my battery is charged give me power dont shut it off on me when I need continuous. Fix this flaw Milwaukee! # Not getting the use of what i bought it for .
Response from Customer ServiceApr 1, 2022
Thank you for your review. We appreciate your honest feedback and we will pass this information along to our team. Please feel free to contact us at socialmedia@milwaukeetool.com if you would like further investigation into this matter. Thank you. -Cayla
    • Recommended
    Can't remove not one lug nut off my car. Don't waste your money or time.
    Response from Milwaukee ToolApr 3, 2022
    Hello, this is Cayla with Milwaukee Tool. Thanks for your review. We would like the opportunity to investigate your feedback further on your Milwaukee M12 FUEL 12-Volt Lithium-Ion Brushless Cordless Stubby 3/8 in. Impact Wrench. We would value hearing your input on why this product didn’t meet your expectations and how we can improve in the future. Please feel free to contact us directly at socialmedia@milwaukeetool.com so we can get this matter resolved as soon as possible for you. Thank You
      2 found this review helpful
      Supplied power to led strip lights
      It really is convenient to have. It allowed me to bring power to my camper and add lights.
      • Verified Purchase
      • Recommended
      Unlimited power!!!
      I’ve unlocked the key to unlimited renewable energy. Just kidding this thing is cool for charging laptops cameras when you are in a remote area
        • Recommended
        Milwaukee continues to sell defective Power Supply
        MILWAUKEE!!! Why do you continue to sell this underperforming power supply? I, like so many here, also read voltage in the 90's (mine says 97.1VAC). Do you have an explanation for why the product delivers low voltage? Why don't you fix this defect before continuing to offer this product?
        Response from Customer ServiceJan 20, 2022
        Hi joep123! We appreciate your concern on the voltage of the M18™ TOP-OFF™ 175W POWER SUPPLY. Anytime you’re measuring AC voltage or current signals that aren’t pure sine waves with an average responding meter, you will not get an accurate reading. You will need to use a true-RMS meter to get the correct voltage. Please email us at socialmedia@milwaukeetool.com if you have additional questions.”
          Such a disappointment
          I bought Inverter and 2x 12 batteries to charge my Nikon z7 camera and laptop on 1 year road trip. 4 moths after it stopped working suddenly. Such a disappointment because I used Milwaukee tools for years and I have never had any issue with them. If I wouldn’t have 3 Anker power banks I would come from that trip without pictures because I didn’t have access to electricity all the time because I was sleeping in tent.
          Response from Customer ServiceJan 6, 2022
          Hi! Thank you for telling us about your experience with the M18™ TOP-OFF™ 175W POWER SUPPLY. We are sorry to hear that you are frustrated with this product. We will send you a follow-up email with additional questions, so we can gain more information. -Cayla with Milwaukee Tool
            Stop measuring the output w/o an RMS multimeter
            Electrical engineer here. So many people are convinced the output voltage is "too low" because they're measuring it with their harbor freight or crapsman non-RMS multimeters. It measures fine with a true RMS multimeter and works great!
              • Recommended
              15 found this review helpful
              Mobile device hero
              Light and portable, nice solution for mobile devices
              • Verified Purchase
              • Recommended
              Awesome product
              Powers laptops, recharges cell phones, and powers all kinds of items up to 175W. I’ve been using it to power a corded soldering iron. Best of both worlds: comfortable, quick, and now cordless. Consistent clean power delivery.
                • Recommended
                Showing 1-10 of 1,106 reviews