DC Conversion and Amp Hours for CPAP
I had a 12v plug installed in our bedroom and now I need to try and figure out how much my CPAP machine uses. I bought a Kill A Watt device and measured 8 hours of sleep last night. The device onl...
Forum Discussion
The meter you used measures kWh at 120V. If we assume the 120V and the 12V adapters have similar efficiency, I would use the same measurement at 12V. Multiply by 1000 to get Wh. Divide by 12V to get Ah. Divide by hours of use to see average amps at 12V.
