SJC

Good info, but the setup you describe isn't quite what myself and a couple others are thinking... Remove the inverter entirely from your equation. What are you left with? A UPS that will run until the tiny battery dies, right? Now remove the battery. Then take the leads that previously ran to the battery and hook them directly to your car's battery. Now we have a self-filtering, alternator charged, hopefully uninteruptable 12v DC to 120v AC solution!

Or so goes the theory. Testing begins in about two weeks for me...if anyone gets to it sooner, let me know!

MP3Car.com

 

Man

ahh, I think he did point out a probem with this, the UPS looks for 120v input or else it will run straight off the battery. As your invertor is not a sine wave it calculates it as being lower than 120v (even though for the wave it is producing it is 120v) now how are you going to make it recognise 12volts as being 120? You can try it but I do not see how it is going to work.

SJC

Like I said: REMOVE THE INVERTER FROM THE EQUATION.

You said: "or else it will run straight off the battery." - Exactly. The only 'trick' is that it will run off the CAR battery instead of the one that came with the inverter... the UPS itself acts as the conversion from 12 to 120 v. The wall plug end of the UPS remains loose and unplugged!! Providing one's alternator is up to the task, the car battery gets recharged through the same way it always does and all is well.

I think I'm going to have to try it this weekend, theories only go so far...

MP3Car.com