Swap 12v for 120v Fridge Element? UPDATE 2
EDIT--it turned out you can't swap them--they are not the same and it would fry things if you applied 120v to the 12v element ---------------------- UPDATE 25 Jan--12v is cooling down the freezer....
Forum Discussion
On battery 12.8v/9.5a = 121.6w
On converter at 13.6v = 135.2w
On converter at 14.8v = 172.6w
There has to be some measurement error here. If you crank the numbers to get the element resistance, it's lower at 14.8 (1.27 ohms) than at 13.6 (1.37 ohms) That's opposite of reality. Also, for good data, the voltage needs to be measured at the element.
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On paper, going from 12.8 to 13.6 volts should have increased power by about 21% to about 147 watts.
I don't see that happening. The element resistance at 12.8 volts is 1.35 ohms. 12.8 volts/1.35 ohms=9.48 amps*12.8 volts=121.3 watts. Using the same resistance at 13.6 volts: 13.6/1.35=10.1 amps*13.6 volts=137.4 watts, a 13.3% increase.
On converter at 13.6v = 135.2w
On converter at 14.8v = 172.6w
There has to be some measurement error here. If you crank the numbers to get the element resistance, it's lower at 14.8 (1.27 ohms) than at 13.6 (1.37 ohms) That's opposite of reality. Also, for good data, the voltage needs to be measured at the element.
___________________________________________________________________
On paper, going from 12.8 to 13.6 volts should have increased power by about 21% to about 147 watts.
I don't see that happening. The element resistance at 12.8 volts is 1.35 ohms. 12.8 volts/1.35 ohms=9.48 amps*12.8 volts=121.3 watts. Using the same resistance at 13.6 volts: 13.6/1.35=10.1 amps*13.6 volts=137.4 watts, a 13.3% increase.
