Amp draw for fridge - nothing is adding up
Hey there, so I'm hoping someone can help me out. I'm throughly confused about my fridge amp draw that will be in my e350 camper that I'll be fulltime living in in just 2 months.
I have a magic chef 10.1 cubic foot 'normal AC' compressor fridge. On the back of it it says
From what I understand if I divide watts (160) by volts (115) I'd get amps (1.39a)
Which is already different than what is listed on the back of the fridge.
So then I'd want to multiply the amps by how many hours a day it would run, right? I guess I'll just say 50% of the time to be safe, so 12hrs.
1.39ax12hrs = 16ah
Then I'd have to convert that to DC right? Which would be the amps multiplied by 12v.
16x12 = 192 Amps to run the fridge for 12 hours a day.
Can someone tell me I'd I did this right?
Then there are questions, like I've read a little about duty cycle of a fridge, does that just mean when it runs? Would my 12 hr running time account for that?
And to make things even more confusing I have energy star rating for the fridge.
297kwh per year
So I followed this calculation
297000 / 365 days a year =
843 wh per day.
843 / 24hrs a day = 35.15 watts per hour.
Watts (35.15) divided by volts (115) = .31 amps
Which is even farther off from the above calculations based off what's on the back of the fridge.
So if I take .31a x 12v = 3.72 amps.
3.72amps multipled by 12 hours of running = 44.64.
So the calculation using the back of the fridge info leads out to 192 ah a day while the energy star leads to 44.64 amps a day.
Hence why I'm terribly confused! Lol. Which one is closer to reality? I'm trying to figure out how many batts I'll need in my bank and panels - etc so that's why I'm trying to get all of this "locked in."
Thanks so much for reading, looking forward to your alls responses!