Measuring is verifying calculations...

 

I agree... how many people can read off hp and 1/4 mile stats off of a flyer and then try to throw it in your face lol. I would image that its closer to 22-23 amps just cus the voltage out of that inverter at that load is prob not quite 110.

 

i had installed a Power converter under my back seat. i used 4 gauge wire also. real handy for sure.

 

Certain auto parts stores sell those huge 4D1000 batteries, it's a huge deep cell battery designed with a massive reserve capacity. My suggestion is this:

Run a 2 or 4 gauge wire to the auxillary battery with a 1 way diode in it, this way it wont drain the starting battery, also it will prevent overloading the alternator. Then run the inverter off of the auxillary battery.

This is what they do for the heavy duty field repair vehicles that have electric cranes on board. The battery will probably run you around $200-$250 depending on state taxes and what not. But it's a solid solution I've helped a couple friends do before. And they just conceal it all in their toolboxes and have an outdoors style plug coming through the box

 

The second battery with the diode is great if you have a spot for it. Running 12V 10-15ft to the back of the cab is the hard part. In order to sustain any amount of power though, the alternator is the source. Batteries are fine as a bucket to hold the flow and regulate it, like a big capacitor.
I needed the 2500W for its surge capacity (up to 5000W), not for a huge sustained load. If 2500W continuous were needed, then a bigger alternator might be required.

 

Current is inverse to voltage, so as the voltage goes down, amperage increases.

 

This is not always true. Ohms law does have exceptions.

 

True but dont think it works that way when your maxing out your inverter.

 

Yep, especially across a fixed load resistance. That rule is more true when talking about mosfets used in a regulated power supply setup. But that's a whole other topic. Lol

 

I see you have an '05? Maybe they put in a bigger alternator for the 2012? I don't know. [EDIT] I just saw something interesting on the curves here- if the normal idle is around 600RPM and the pulley ratio is 2.95, then at idle I'd only get about 140A out of the alternator. I wonder if there is a way to set it to idle to 1000 when the inverter is on? Hmmm...




Ps- yeah, huge long deathmetal hair.