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Whistler PI-400W 400 Watt Power Inverter

3.6 3.6 out of 5 stars 36 ratings
Currently unavailable.
We don't know when or if this item will be back in stock.
Brand Whistler
Power Source Battery Powered
Model Name PI-400W
Voltage 12 Volts
Item Weight 2.1 Pounds

About this item

  • 400 Watt continuous power, with 800 Watt peak power
  • Plugs into cigarette lighter socket
  • Electronic circuit protection, and cooling fan
  • Overload, short-circuit, and temperature protection
  • Includes battery cables

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Whistler

Whistler PI-400W 400 Watt Power Inverter

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Product Description

Amazon.com

The Whistler PI-400 400 Watt power inverter allows you to run some AC appliances right from your car, boat or RV. Perfect for weekend use and life on the road. They're also great for power outages.

400 Watts continuous power to run AC appliances right from your car, boat or RV. Click to enlarge.

Two separate outlets. Click to enlarge.

Connects directly to your vehicle's battery. Click to enlarge.

Whistler Power Inverters
For many of us, a vehicle is more than just transportation. It can be a mobile office, communications or entertainment center, or simply an expression of our personality. Whistler products are designed to make the time you spend in your vehicle more productive, more fulfilling, safer, or just simply more fun. Whistler's mission is to provide products that improve your driving experience.

Whistler offers a complete line of DC to AC inverters ranging in capacity from 100 Watts to 3000 Watts. These inverters offer advanced technology, dependable operation and will provide years of reliable service when used in accordance with their operating instructions.

PI-400 Features

  • Full Output Power--Other inverters have reduced output over time.
  • High Surge
  • Cooling fan
  • Ground Fault Sensing
  • 20 Amp Power Requirement--at rated output

    Electronic Circuit Protection

    • Overload Protection
      Inverter will automatically shut down if load exceeds inverter rating.

    • Smart Surge Control
      Inverter will attempt to start loads above the continuous rating for up to 10 seconds.

    • Voltage Protection
      Whenever the input exceeds 15 volts DC or is less than 10 volts, the inverter will automatically shutdown.

    • Short Circuit Protection
      Automatically shuts down until short circuit is removed.

    • Thermal Cutoff
      Automatically shuts down if internal temperature exceeds safe design parameters.

      What's in the Box
      Whistler PI-400 400 Watt power inverter, User's Manual

From the Manufacturer

Whistler offers a variety of power inverters that allow you to run your AC appliances right from your car, boat or RV. Great for weekend use and life on the road, inverters are also lifesavers during power outages.

Looking for specific info?

Important information

Legal Disclaimer

Use item at your own risk. It has not been tested or used. Read included Whistler instruction booklet before using item. As electrical equipment carries inherent risk, please take all precautions when using this item. Inverter FAQ page at www.whistlergroup.com

Customer reviews

3.6 out of 5 stars
3.6 out of 5
36 global ratings

Customers say

Customers like the performance, value, and power of the inverter. For example, they mention it works well, is well worth the investment, and provides plenty of power to recharge a cell phone or laptop. That said, some complain about the noise it makes.

AI-generated from the text of customer reviews

19 customers mention17 positive2 negative

Customers generally like the performance of the inverter. They say it works well, is quiet, and has no problems. Some mention that it works awesomely to power their desk radio and Hamilton Beach air purifier, and that it's an excellent product for their purposes.

"...at one point we had the laptop running for over 3 hours and had no problems at all...." Read more

"What can I say? It works wonderfully. I used it for an extended period of time while driving and it worked exactly as I was hoping it would...." Read more

"...For lower power applications it has worked weeks flawlessly. Today I finally needed to use it for what I purchased it for...." Read more

"...It worked awesomely to power my desk radio and Hamilton Beach air purifier. I started using June 1st 2009 and it lasted until just after Christmas...." Read more

7 customers mention7 positive0 negative

Customers are satisfied with the value of the power inverter. They mention it's well worth the investment, excellent buy, and relatively cheap. Some say the product is awesome.

"...Well worth the investment and will hopefully last me a long time." Read more

"...THIS IS ANOTHER PRODUCT THAT IS RELATIVELY CHEAP... WORKS.. EVENTUALLY FAILS, SO WE BUY ANOTHER ONE... I COULD SEE POSSIBLY THAT A MUCH MORE..." Read more

"...In general I find a good product to a good price and I recommend it." Read more

"...What else can I say. Great product." Read more

4 customers mention4 positive0 negative

Customers are satisfied with the power of the inverter. They mention that it has plenty of power to recharge their cell phone, inflate their tires, and power their laptop. They also say that it handles a pretty good load for the price.

"...AND UNDER A FULL LOAD, BUT THEY DO WORK AND THEY CAN PROVIDE A LAPTOP WITH PLENTY OF POWER, PERSONALLY I PREFER TO RUN CABLES TO THE BATTERY..." Read more

"...It turn that 40 watt is plenty of power to recharge my cell, inflate your mattress, etc. Great item to carry" Read more

"...it out... but it does exactly what it's supposed to do and handles a pretty good load for the price." Read more

"...You can definetely hear the fan, but it is solid and did a great job powering laptop and charging cell phone" Read more

5 customers mention0 positive5 negative

Customers are dissatisfied with the noise level of the power inverter. They mention that it makes a little noise, but you can barely hear it if the heat/AC fan is on.

"...It does run a little loud, but that wasn't a huge deal, as the sound of driving and my music covered up the majority of it...." Read more

"...into a 3-prong receptacle in my 2010 Camry. The unit makes a little noise, but you can barely hear it if the heat/AC fan is on low or the radio is..." Read more

"...inverter to weigh that I work he/she notices that a sharp noise takes place in the inverter and I cause myself since clearly curiosity the laptop..." Read more

"...The fan is about medium in noise generation but not a bother. I use it to power lights for all seasons (Christmas, Easter, Halloween etc.)..." Read more

Top reviews from the United States

EJ Gonzalez
5.0 out of 5 stars Must-Have for long trips
Reviewed in the United States on July 21, 2010
Verified Purchase
We purchased the Whistler PI-400W from Amazon and received it just in time for our vacation/road trip from CT to Florida (Round trip of over 48 hours on the road). The unit comes with a lighter adapter and also 3 ft cables to run to the battery. We opted to connect directly to the battery of our our 1999 Honda Civic in order to get the full power of the unit (lighter adapter has a max output of 180 watts - different for each vehicle). We were able to connect our laptop and charge our Digital Camera & Camcorder off this unit. The unit never ran hot or drained our vehicle's battery. Granted, we only used this unit while the car was running. But, at one point we had the laptop running for over 3 hours and had no problems at all. I highly recommend this for anyone needing regular home power on the road!
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Jessica McKelden Bennett
5.0 out of 5 stars Surprisingly Excellent
Reviewed in the United States on August 28, 2010
Verified Purchase
What can I say? It works wonderfully. I used it for an extended period of time while driving and it worked exactly as I was hoping it would. It does run a little loud, but that wasn't a huge deal, as the sound of driving and my music covered up the majority of it. Well worth the investment and will hopefully last me a long time.
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Caroline
1.0 out of 5 stars Very Disappointed
Reviewed in the United States on December 24, 2009
Verified Purchase
I bought this device after years of having a much lower power model work great and this one had good reviews.

For lower power applications it has worked weeks flawlessly. Today I finally needed to use it for what I purchased it for. Startup watts on my device is 380 watts and continuous power is around 200. Well under the 800 watt peak of this unit. It died on within a second. Thinking the fuse had blown, I popped it out and it isn't. The unit itself is blown. I hope I'm within the return period and if they don't replace this one, it will be my last purchase of one of their products.
5 people found this helpful
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John P. Penning
2.0 out of 5 stars The Unit I Had Wasn't Up To Snuf
Reviewed in the United States on September 14, 2009
I had previously purchased a Xantrex 851-400 inverter to run in conjunction with a marine battery so as to power lights for my jewelry booth at Art Fairs. I was very happy with it but when I decided to expand my use of lights, necessitating a second battery and a second inverter, for whatever reason I decided to try the Whistler PI-400W and save a whopping $7.55. Big mistake. The Xantrex will operate flawlessly for 2 days sucking enough juice out of that marine battery to operate 75 watts of CFL bulbs for 8-10 hours each day. The Whistler worked well for the first day but kick off after 2 hours of the second. The first time that it happened I rationalized that perhaps I hadn't fully charged the second marine battery but after making sure to test it again with both batteries on successive weekends, I got the same result both times. The moral of the story is that Amazon does a great job of refunding your money during the first 30 days and don't get cheap when making your purchase. If you find a product that does the job well that you need it to do, pay the man!
19 people found this helpful
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Chris the reviewer
3.0 out of 5 stars Great while it lasts.
Reviewed in the United States on February 23, 2010
Verified Purchase
I must say I really liked this inverter from Whistler. It performed very well in daily use. I used in My street sweeper that I drive in NYC for 8 hour work days. It worked awesomely to power my desk radio and Hamilton Beach air purifier. I started using June 1st 2009 and it lasted until just after Christmas. I loved the whistle it gave if my battery was low however it was the same whistle that would announce its death followed by horrible electrical smoke and smell. I was going to attempt to submit a warranty request but I have since lost the inverter altogether. I would have put five stars if it never burnt out yet I won't put one star because I never found out the warranty experience. So it's three stars.

10/31/10 An update: Around back in 5/2010 I found the inverter and sent the inverter back. It's under 2 or 3 year warranty. They sent a fixed or new one back super fast! Good company! Since it was purchased on Amazon I had all the proof of purchase I needed. Good experience overall.
2 people found this helpful
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KEN
4.0 out of 5 stars DECENT VALUE
Reviewed in the United States on June 19, 2012
Verified Purchase
WE USE THESE A LOT, THEY DON'T LAST FOR EVER, THEY ARE EASY TO BURN OUT IN THE ARIZONA HEAT AND UNDER A FULL LOAD, BUT THEY DO WORK AND THEY CAN PROVIDE A LAPTOP WITH PLENTY OF POWER, PERSONALLY I PREFER TO RUN CABLES TO THE BATTERY DIRECTLY RATHER THAN USE THE AC ADAPTER, BUT.... ITS LESS PORTABLE THAT WAY, MEANING TRANSFERRING FROM CAR TO CAR, SO THE AC ADAPTER IS USEFUL IN THAT RESPECT. I WAS GLAD TO SEE OURS SHIPPED WITH BOTH OPTIONS.

THIS IS ANOTHER PRODUCT THAT IS RELATIVELY CHEAP... WORKS.. EVENTUALLY FAILS, SO WE BUY ANOTHER ONE... I COULD SEE POSSIBLY THAT A MUCH MORE EXPENSIVE ONE MIGHT LAST LONGER, BUT WE HAVEN'T REALLY WANTED TO SPEND $100 JUST TO FIND OUT $50 WORKS THE SAME.
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Bobby C.
5.0 out of 5 stars Great product for plugging electronic devices into your car
Reviewed in the United States on March 21, 2010
Verified Purchase
I bought this so I could plug my laptops, phone chargers, portable shaver, etc. into a 3-prong receptacle in my 2010 Camry. The unit makes a little noise, but you can barely hear it if the heat/AC fan is on low or the radio is on. I've been using this on an as-needed basis for months now and have never had any issues. Excellent product for my purposes!!!
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M. Nouh
5.0 out of 5 stars Tool you need
Reviewed in the United States on December 7, 2011
Verified Purchase
For every camper, A tool such as this one is a must. I was debating either to purchase this 400 watt or a more powerful one. It turn that 40 watt is plenty of power to recharge my cell, inflate your mattress, etc. Great item to carry
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