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Old 09-27-2018, 11:21 AM   #1
Mako
Guru
 
City: Seattle
Join Date: Jun 2012
Posts: 3,312
Power usage for A+++ Fridge

I never had a chance to measure the true power consumption of my previous digital inverter fridge/freezer, but as I am shopping now I got in touch with Samsung tech support and an engineer, and received the following information that I though I would share:

Model: Samsung RB31 Fridge (top) / Freezer (bottom)
Size: 11.5 cubic feet (7.3cf and 3.5cf net)
Motor: Digital inverter technology
Energy consumption:
* 172 kW annually
* 480 watts daily
* 725 watts running with defrost mode

Therefore it will consume 530 watts daily (at 90% inverter efficiency) = 67 amps at 12VDC, or about 63 watts per cubic foot per day. Since it has a digital inverter motor it should run just fine on a 800 watt PSW inverter.

I wonder how that compares to the expensive marine fridges and the Danfoss homemade fridges that so many sailboaters brag about?
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