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Power inverter consumption

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Posted by Jim on September 25, 2007, 7:13 pm
 
    Anybody have a round idea of what an inverter putting out 1500 watts AC
would draw from a 12VDC battery on a riding mower?
    TIA,
    Jim



Posted by RW Salnick on September 25, 2007, 7:31 pm
 
Jim brought forth on stone tablets:

Maybe 1600 watts.  At 12V, this is 133 amps.  That little lawn tractor
battery isn't going to last long.


bob
s/v Eolian
Seattle

Posted by Jim on September 26, 2007, 2:27 pm
 
    It's just an idea to power my electric saw out in the woods; cut up the
saplings, load them in the cart and haul it all back to the house. I would
probly draw the current for a total of 10 minutes once a week. I just didn't
know how lossy it would be.
    Thanks!
    Jim


Posted by RW Salnick on September 26, 2007, 2:52 pm
 Jim brought forth on stone tablets:

Not really that lossy...  1600 watts out of the battery to deliver 1500
watts of AC from the inverter is pretty good efficiency (about 94%).

You asked in another post about putting in a deep cycle battery - that
would work.  You can draw that kind of current out of it for short
periods of time.  But the small charging circuit in the lawn tractor is
not going to be able to replenish it.  In essence, you are going to have
to fill the battery up at the house with a battery charger.

Have you considered a gas saw?

bob
s/v Eolian
Seattle


Posted by Jim on September 26, 2007, 3:18 pm
 

    Like, never? What if I switch the headlights which currently remain on
always?

 In essence, you are going to have

    I hate them, and have a bad cord yanking arm. They suck, IMO.


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