Skip to main content ↑ ↓
Topic: Residential fridge wattage (Read 599 times) previous topic - next topic

Residential fridge wattage

Do you have a residential fridge?

If so do you have some real time wattage use for overnight? Like having a kill-a-watt meter on the fridge or something like that.

I have the Samsung RF18 and need something to compare it with. I know that I have some loss going through the inverter along with stand by draw but was wondering what others was seeing. I understand all situations, weather, inverters, and installs are different but was looking for an average as to others.

Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: Residential fridge wattage

Reply #1 –
I'll put my Kill-O-watt on later and give you the info after 24 hrs. being a 22 cu. ft. it will probably be more but mine is low energy compliant.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Residential fridge wattage

Reply #2 –
My fridge uses 11amps at 12 volts when running and it is a 13 cubit foot Frigidaire.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Residential fridge wattage

Reply #3 –
Average info here is around 125 amp hours per 24 hours use of 12 volt from the batteries
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Residential fridge wattage

Reply #4 –
Unless quoting in WATTS (which is amps times volts), please specify amps or amp-hrs AT WHAT VOLTAGE (12 VDC or 120 VAC).
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Residential fridge wattage

Reply #5 –
My RF18 will pull between 8 and 11 amps DC through the inverter depending on how hard the compressor is working.
Keith
2003 U320 38' #6197

Re: Residential fridge wattage

Reply #6 –
Mike, my 10.1 Magic Chef used 30.15 kw over 932 hours as measured on the AC side. No ice maker, various weather and self defrosting. Not an apple to apple comparison for your situation. I believe the base plate lists the running wattage as 60, so it runs a little over 50% of the time. We keep it pretty full and never turn it off.
1998 36 foot U270 Build No. 5328 WTFE, 900 watts solar, Victron controller, B2B, bat monitor, 600 AMPH lithium with 2018 Chevy Colorado toad, SKP #110239, Motorcade #17781, 2021 Escape 17B for when Coach is broken down and campsites are too small, retired and full-timer since Dec. 2020. Part of RV family since 1963.

Re: Residential fridge wattage

Reply #8 –
Chuck,

Thanks for the link as it has some real good info. I had found this a few days ago. With this, along with some PMs, and this new thread it seems like I am just fighting summer heat. Most fridges are made to operate inside a home that is air conditioned. With the fridge inside a cabinet in the RV and with the back wall being the outside wall of the RV there isn't much cool air getting around the skin of the fridge. When summer got here this fridge wattage use seemed to jump up to the point of sliding the fridge out and cleaning the coils thinking they might be clogged with dust. I didn't notice this jump in usage in the past so I was just looking for some more real world numbers to crunch. The other thing that could be contributing to this mystery is I am reading some of my usage with a new metering system that is part of the upgraded lithium system.

Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: Residential fridge wattage

Reply #9 –
Quote from: WS6_Keith –
My RF18 will pull between 8- and 11-amps DC through the inverter depending on how hard the compressor is working.
I would be surprised if a residential fridge is only pulling 80 to 110 watts while the compressor is running. There is a tag on the fridge somewhere. What does it indicate for power or amps? Amps listed for 120 volts are multiplied by 10 for 12-volt supply to inverter. Then there becomes the duty cycle for how long in a 24-hour day it ii actually running, or defrosting.
Dennis Haynes
Bohemia NY
2008 Nimbus 342 SE Carlyle
Build #6475
Motorcade #19148

Re: Residential fridge wattage

Reply #10 –
Quote from: Dennis H –
I would be surprised if a residential fridge is only pulling 80 to 110 watts while the compressor is running. There is a tag on the fridge somewhere. What does it indicate for power or amps? Amps listed for 120 volts are multiplied by 10 for 12-volt supply to inverter. Then there becomes the duty cycle for how long in a 24-hour day it ii actually running, or defrosting.

My numbers come from a Victron BMV-712 monitoring actual battery draw through a shunt.  With the fridge off, my coach will pull ~3-4A.  With it on, it pulls 11-14A with nothing else on or running.
Keith
2003 U320 38' #6197

Re: Residential fridge wattage RF18 Specs

Reply #11 –
Stainless Steel 18 cu. ft. Smart Counter Depth 3-Door French Door Fridge |...

Power
Energy Consumption 540 kWh/yr
Volt/Amps 115V/60Hz/ 3.0A

This is very efficient for a fridge this size. Supporting this could require up to 30 amps to the inverter.

I would confirm the Victron shunt is wired correctly, and the settings are correct. If I recall, there is a setting for the shunt voltage. That gets set to the shunt design, not battery system voltage.

Dennis
Dennis Haynes
Bohemia NY
2008 Nimbus 342 SE Carlyle
Build #6475
Motorcade #19148