Forum Discussion
MrWizard
Nov 21, 2018Moderator
I ran a test with my 100 amp A.C. Power meter DIY kill a watt
Battery condition was too high for a full 75 amps
I did get 67.2 amps charge rate
Input to the converter 114.0 volts, 12.90 amps = 1470.6va
Watts reading 1153.4
Cos/PF 0.771 reading,
But 1153.4/1470.6 = 0.784, don't know why the difference but is not great enough to matter much
How ever when charging got down to 3.6 amps
Input was 120.3v * 1.18 amps = 141.95va
85 watts
Cos/PF 0.59
Got to be careful with them store bought kill a watt meters
You can blow the tiny internal fuse
Been there done that, also repaired it
But I Built the big one three years ago to read generator and shore power
I put it in a HF plastic ammo box, and wired it with 30 amp male and female RV plugs
Using adapters I can do 15a, 20a, 30a, 50a
Battery condition was too high for a full 75 amps
I did get 67.2 amps charge rate
Input to the converter 114.0 volts, 12.90 amps = 1470.6va
Watts reading 1153.4
Cos/PF 0.771 reading,
But 1153.4/1470.6 = 0.784, don't know why the difference but is not great enough to matter much
How ever when charging got down to 3.6 amps
Input was 120.3v * 1.18 amps = 141.95va
85 watts
Cos/PF 0.59
Got to be careful with them store bought kill a watt meters
You can blow the tiny internal fuse
Been there done that, also repaired it
But I Built the big one three years ago to read generator and shore power
I put it in a HF plastic ammo box, and wired it with 30 amp male and female RV plugs
Using adapters I can do 15a, 20a, 30a, 50a
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