Question about Power Inverters

3 Answers

Power inverter My 400 watt power inverter is not getting power. Does it have a fuse I should change. The problem is the inverter as my other inverter works off same power source. thanks, M

Posted by on

  • carlos proano
    carlos proano Jan 06, 2009

    Does anyone have a circuit schematic diagram for the Balck & Decker PI400AB? I need to repair it as it has been connected reverse to the 12VDC supply.

  • skiptempe Apr 15, 2009

    I have the same problem. It won't charge up and it won't jump start anything. I was also thinking of a fuse or something that can be re-set. The both lights turn on but when I tried the pump, nothing. Even with the switch on or off and the charging unit plugged in. How about some help.


3 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has answered 200 questions.


    An expert whose answer got voted for 20 times.

  • Expert
  • 242 Answers

Most likely a fuse. Check for a fuse on the inverter itself or one inline with the plug. Usually you can screw off the tip of the plug and replace the fuse inside.

Posted on Oct 24, 2008

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 2 Answers

If you accidentally connected the 12V leads in reverse this is your solution. I just solved this one myself on a 750watt B&D.
You will need a small and medium size phillips (x shape tip) screwdriver, a set of small needle nose pliers and something like a knife to get under the edges of the logo stickers to remove them.. There are internal fuses in most of these inverters on the 12V side. Remove all the mounting screws, including the ones under logo stickers. Make a note of where the different screws go because they are different sizes. You can leave in the screws on the 110V side cover. when you have all the screws removed, the innards should slide out partially. (1+1/2 inches) Do not force it too much as there are wires going to the 110V plugs still attached. Remove the fans if they are in the way. You should be able to get at the automotive fuses inside. They are small flat plastic rectangles 3/4 inch by 3/16 by 3/4 inch deep, with a number printed on the centre at the top. You can see on the side of them if they are blown if the little curved wire in the centre is broken. Carefully pull these out with the pliers if the they are blown and replace with new ones from an automotive or electronics store with the same number printed on the top.
If you find the fuses are not blown then there may be another problem
Good luck

Posted on Jun 12, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Indeed the fuse, I connected my PI200 in reverse also, In the rear, where the power leads are, there are 4 small outer screws ,remove them and pull out black panel, (you can leave the 4 screws around the fan intact) you should see an auto-type flat 25 amp fuse on the right. I replaced that and it worked fine. The circuit board that the fuse is mounted on slides out app 3/4 in. if needed, i used needle nose pliers to remove fuse. Good Luck !

Posted on Nov 04, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Why do the fuses blow out every time I plug it in

watts divided by volts equal amps so 400watts devided by 12 volts equal 33 plus amps if wires and fuses wont handle 35 amps they will blow to keep from burning up the wiring of your vehicle

May 14, 2015 | PEAK 400 Watt Tailgate Inverter Max -...

1 Answer

What is the amp size of the external fuse of a whistler 400 watt power inverter

The lighter socket power cord has a 15 amp fuse. The cable with the battery clamps do not have fuse protection.

Aug 27, 2012 | Whistler 400-Watt Power Inverter - Silver

1 Answer

Serial#C11088451 no a/c output after switch is turned on from recepticle & battery charge % or output power watts display not working

Check inverter fuse, the fuse contacts and, check switch itself. I have seen numerous failed switches of the same configuration on other devices

Dec 30, 2011 | Xantrex Technology Statpower XPower...

1 Answer

I am running a Whistler 400 watt power inverter and have issues with the Isuzu lighters urning out wires or blowing the inverters. I am running an PH mini computer with touch screen and a Start micronics...

If the inverter is blowing your vehicle's lighter socket fuse, does it do it immedately or only when you try and operate a device? If its when you operate your device, it may draw more than 100-150 watts. This wattage is the limit for most lighter sockets. Double check the devices power requirement.

Dec 07, 2010 | Whistler Power Inverter

1 Answer

My name is Gena. The VEC024B that is being used by our field technicians are having problems with the fuse blowing in their work vans. Their vans are equipped with laptops.

Hi Gena, the inverter is a 400 watt unit. This is not a rating for a continuous load. You do not mention which fuse is blowing. This could be the fuse in the inverter or the cigarette lighter (power source) fuse. In either case, a fuse blowing could be a short circuit, something in the inverter shorted, or too much load. I am going to look at the too much load side of things. Not knowing how many laptops are being used, with the inverter if you have a 20 amp fuse in the cig lighter, this will allow you 20 amps X 12 volts = 240 watts. I would not run the inverter over 240 watts because of overheating issues. So, 240 watts will run 3 laptops. Just the laptops. Most laptops draw around 70 watts. check your power supplies on them to find their rating. If you exceed the 240 watts by combining the ratings, then you can expect trouble with your inverter. It will give 400 watts, but this is a temporary condition only. Another inverter will be needed or a larger one installed and it being connected directly to the battery (with a fuse of sufficient size installed). You could also (let us say there are 6 computers) charge and run 3, and the other 3 are running on their batteries. After an hour, switch so that the 3 running on batteries now are charging as well as running. The other 3 are now charging.
I hope this helps. If you have any other questions please provide additional information. Such as the size and location of the fuse blowing. The laptop power supply ratings.
thank you

Oct 15, 2010 | Vector VEC024B MAXX SST Power Inverter

1 Answer

Output voltage unable to get above 90 V AC on battery tried on running car and only got 90 Volt AC also.

With the car voltage at 13.8V and you have less then a 400 Watt load the inverter is probably bad. The output voltage is not adjustable by the user.
Good Luck,

Feb 27, 2010 | Vector 400 Watt Power Inverter #VEC024

1 Answer

Overloaded my inverter -now only works when hooked to car battery

It sounds like the fuse that protects you cigarette lighter is blown.

After you have replaced the fuse, check the voltage again. 0.015vdc would not have powered anything that in manufactured to operate on 12vdc.

When powering anything over about 250W, I would suggest connecting directly to the battery to avoid overloading the lighter circuit.

Nov 07, 2009 | Vector VEC1024 400 Watt Power Inverter

2 Answers

2nd season with 400 watt vehicle 1024 inverter. The

Restating the question - 400 watt inverter is turned on and running with the vehicle turned off.
After starting vehicle the red light of the inverter is on with no power output from the inverter.
If you turn the inverter off then on inverter operates normally.

Solution - this is normal operation - my inverter does the same thing. When you start the vehicle
it draws a lot of current from the vehicle battery which causes a drop in battery voltage. Most inverters have a low voltage input safety and will fault the device.'

If the problem is turn on inverter then the red light starts flashing... I am thinking you
have the same problem as the one I replaced - it broke... I am sure some capicator
or other component in the circuit failed... My solution was to purchase a new one...

Mar 03, 2009 | Inverter Vector 400-Watt Power

Not finding what you are looking for?
Power Inverters Logo

Related Topics:

2,068 people viewed this question

Ask a Question

Usually answered in minutes!

Top Power Inverters Experts


Level 3 Expert

61196 Answers


Level 2 Expert

66 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a Power Inverter Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides