In-line fuse for inverter?

A 150a fuse should give you adequate protection for the #2 wire (so it doesn't burn up in the event of a short) and still provide enough current to the inverter for full power. 1500 watts will take 100 - 125 amps depending on the voltage in the truck. Make sure all connections are clean and tight, and that the wiring can't be pinched or worn. It's a good idea to protect the wiring with plastic loom, especially where it can rub up against anything. Hope this helps.

 

An auto parts place should be able to help. Make sure you get spare fuses.

 

I have never installed a fuse on my inverter. If you ever get a chance to look inside, there are a number of 20A fuses inside that protect it in case you hook it up wrong. A good place to start if the thing doesn't work is by replacing all those fuses as well.

 

I am not trying to be rude or aggressive, but I can not disagree with you more or encourage you to reconsider what you are doing here. The fuses this post talks about are not meant to protect the inverter or the components attached to the inverter. Rather, they are specifically meant to protect the vehicle, the driver, and the safety of everyone else. An inverter is essentially an amplifier that puts out a specific frequency at a specific power rating (60Hz at 120v iirc). The fuse, just like in car audio, should be placed within 18 inches of the power source (battery) and rated to the size of the wire and the inverter (ie.. you should use a fuse that will not blown by normal inverter use, but WILL blow if a short occurs (such as the wire rubbing up against a metal part or through the grommet where the wire passes into the cab).

What can happen without a fuse is that when this short occurs, the wire will heat up and quickly start burning. I would argue that this is even more likely in a truck than a car given the higher vibration levels.

Fuses are cheap protection and highly recommended for any power installation.


To the OP: if you want to shop around, you may also look at car audio shops and online car audio sites. They may have them a bit cheaper.

Hope this helps!