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
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.
My fridge uses 11amps at 12 volts when running and it is a 13 cubit foot Frigidaire.
Average info here is around 125 amp hours per 24 hours use of 12 volt from the batteries
Unless quoting in WATTS (which is amps times volts), please specify amps or amp-hrs AT WHAT VOLTAGE (12 VDC or 120 VAC).
My RF18 will pull between 8 and 11 amps DC through the inverter depending on how hard the compressor is working.
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.
Mike,
Did you see the thread linked below?
Residential fridge energy use (split from Yacht Fridge VS Residential Fridge) (https://www.foreforums.com/index.php?topic=28280.0)
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
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.
Stainless Steel 18 cu. ft. Smart Counter Depth 3-Door French Door Fridge |... (https://www.samsung.com/us/home-appliances/refrigerators/3-door-french-door/18-cu--ft--smart-counter-depth-3-door-french-door-refrigerator-in-stainless-steel-rf18a5101sr-aa/?CID=afl-ecomm-rkt-cha-040122-url_Cashback+on+Bing+for+Edge+browser&utm_source=url_Cashback+on+Bing+for+Edge+browser&utm_medium=affiliate&utm_campaign=1&utm_content=3829940&rktevent=Cashback+on+Bing+for+Edge+browser__jZHTpnCvx8-M0g2rrWlondfC7_3vz94eg&ranMID=47773&ranEAID=%2FjZHTpnCvx8&ranSiteID=_jZHTpnCvx8-M0g2rrWlondfC7_3vz94eg#specs)
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