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Power tech 800 watt inverter over load and won't restart red light flashes ?

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Posted on Jan 02, 2017

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SOURCE: 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...

Posted on Mar 03, 2009

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SOURCE: I just bought a power inverter for use with my pc.

There are two possibilites: the first is the over 400W power draw, the other is how you have the inverter connected. Do you have the inverter connected directly to the battery terminals (the clips) not the outlet plug (cigaretter lighter)? This is needed for any load over 80W and under 400W. (the inverter can handle a load demand over the 400W limit but only for short periods (800W).)

What is the load that your PC pulls (Is it a laptop or a desktop)? The laptop in my home has either a 65W or a 90W load (depending on the battery and the AC adapter we are using). Desktops take much more power (usually).

I hope this helps.

Cindy Wells

Posted on Jul 15, 2010

  • 1 Answer

SOURCE: i have a 800 watt inverter an i use a 1500 watt

i have a 1000 watt 220 volt kettle what size inverter would i need i have 2 x n70zz baterys to conect to the inverter

Posted on Aug 02, 2011

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1 Answer

Sunna 3000TL inverter , red led light flashing ,


Unplug the inverter, and have the outlet tested. After being unplugged for a while, the inverter should reset when it is plugged into a grounded outlet.

Nov 26, 2013 | SMA Sunny Boy 6000US Inverter, 6000W,...

1 Answer

I have a auto pro 800 watt inverter that gives 220volt ac **** wont run my kellerman freezer it runs in the house on ac can you help


If your freezer need more than 800 watts to run then your 800 watt inverter will be overloaded and it will shutdown.

Mar 21, 2012 | Vector 1000w Power Inverter

1 Answer

I have a 700 watt power inverter. what appliances can be used for that amount of watts.


Please understand that an inverter should only be used for temporary use, not like a generator. 700 watts is about the upper limit that most cars or light truck alternators can take.

Before adding loads to the inverter, check the wattage rating of each device you plan to connect. You should not exceed 80% of the inverter's capacity, or 560 watts continuously (.8 x 700).

Some inverters output a pure sine wave, meaning they are suitable for things like computers or other more sensitive electronics. If the inverter outputs a square wave, you should be careful not to connect devices that could be harmed.

If you look on the inverter, there should be a model number and make. It's best to refer to the owner's manual before you use the inverter. If you don't have a book, you should be able to find one on-line if you search by make and model. There may also be a phone number you can call for technical support or to obtain a manual.

Aug 27, 2011 | Vector 800 Watt Digital Power Inverter

2 Answers

The output(w) is indicating o.oo and it's indicator light is red .I only have a couple of floor model fans plugged. Should it be showing something and should the light be green?


inverters run on a square voltage unlike normal 110 runs on a round voltage, the only 2 things that won't run on the inverter is fans and electric blankets

Jul 22, 2011 | Cobra 2500w Power Inverter

1 Answer

I just bought a power inverter for use with my pc.


There are two possibilites: the first is the over 400W power draw, the other is how you have the inverter connected. Do you have the inverter connected directly to the battery terminals (the clips) not the outlet plug (cigaretter lighter)? This is needed for any load over 80W and under 400W. (the inverter can handle a load demand over the 400W limit but only for short periods (800W).)

What is the load that your PC pulls (Is it a laptop or a desktop)? The laptop in my home has either a 65W or a 90W load (depending on the battery and the AC adapter we are using). Desktops take much more power (usually).

I hope this helps.

Cindy Wells

Jul 15, 2010 | Black & Decker Power Inverter PI400AB

1 Answer

I have a vector 3000 watt inveter red fault light is on, wont power a 6.5 amp fuel pump


Check that ground is correctly connected. If nuetral is provided, ensure it too is connected. Your total load is 780 watts. Check power in and ground out of the supply side. There may be a fuse in the inverter on the output side also, replace if necessary. If fault light does not go out after these checks, you will need to contact Black and Decker who manufactures the vector series now.

Jan 16, 2010 | Vector Power Inverter - 3000 Watt

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

1 Answer

No power output from my vector 1000w inverter.


Buy a different brand of inverter. Yours has developed a short which the protection circuit is catching. It then tries a restart but fails all over again. Most likely o/p short which looks like an overload to the inverter.

Jan 30, 2009 | Electronics - Others

1 Answer

Conecting to 120 volts AC


If you want to get more precise, figure out everything in terms of power (watts).

Basic electrical rule 1, 2 and 3:

voltage x current = power

or re-arranged:

current = power divided by voltage

or re-arranged:

voltage = power divided by current


For example, 12V X 2 amps = 24 watts.

or another example, 400 watts divided by 120 Volts = 3.33 amps

A 55W headlight that uses 12V would draw 55 /12 = 4.6 amps @ 12V

A 55 watt light bulb in a lamp at home would draw 55 / 120 = 0.46 amps @ 120V


As the previous post mentioned, inverters are not perfect when convertering 12V into 120V. If the converter consumes 1000W from the 12V battery, then a 90% effecient converter would generate 900W of 120V AC power best case. The other 100W is lost primarily as heat.

The other thing that gets tricky is that these ratings and the formula above are used for resistive loads, like light bulbs or hair dryers. Anything with a motor or transformer is considered an inductive load and can get much more tricky to calculate.

Consequently you need to give your self a safety margin when figuring out how big an inverter you need.

How does work in a practical sense?

Lets say you want an inverter for TV, DVD and Sat. Receiver. Look at the back of TV or in the manual. It should say how many watts it consumes. Lets say it is 400W. The DVD might be 100W and the Sat. receiver 50W - just as an example.

400 + 100 + 50 = 550 Watts. (just as an example)

You might think, well no problem, I'll use a 600 Watt inverter and have 50 watts left over. Depending on your inverter, that 600W might really be 600 x 90% effecient = 540 Watts of AC, less a 20% margin of error for the inductive transformers in the electronic of the TV, DVD and Sat. receiver 540 - 20% = 432 Watts.

Now you can see your 600 Watt inverter isn't big enough to do the job.

If we really need 550 watts of AC, add 10% to make up the effiency loss, then add a safety margin for inductive loads.

550 + 10% = 605 + 20% = 726 Watts.

Sounds more like an 800W inverter fits the job.

What does that mean in terms of wiring the 12V batteries to the inverter?

from the formula above:

current = power divided by voltage

In our example, we have an 800W inverter that runs on 12V

The current would thererfore be:

current = power divided by voltage
current = 800 watts divided by 12V
current = 66 amps.

That is important info because you can not use light gauge wire to carry 66 amps worth of 12V to the inverter nor could you use a 20A fuse to protect your inverter.

Now that's a lot of science for a guy who just wants to run a toaster on an inverter right?

800W / 120V = 6.66 amps

Using garryp's ratio 11:1, 6.66 x 11 = 73 amps.

That is a good ratio with a good safety margin.

This is all just MHO and should not taken as solid technical advise. In other words, don't blame me if you blow yourself up.

Nov 26, 2008 | Coleman 5640B807 Compact Refrigerator

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