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Old 01-29-2016, 09:54 PM   #1
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Samsung RF18HFENBBC Power Usage

I have searched dozens of threads on here, scanned the Samsung website, and checked numerous other websites for wattage used on the Samsung RF18HFENBBC.

Does anyone have the actual readings from a Kill-A-Watt Meter? I would love to know the wattage actually pulled, instead of factory ratings. Some people have posted the kwh for the device, but I want real readings, just the watts.

Reason being, I have a PSW 750 inverter installed now and I want to use that for my in progress fridge install.

Thank You,
Scott
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Old 01-29-2016, 10:41 PM   #2
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I don't have the kill-a-watt data, and agree it's the definitive answer to. However 750w is typically not enough to handle the compressor startup current. A 1000w unit sometimes, more often a 1500w is needed. My RR refrigerator, 1000w won't do it.
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Old 01-30-2016, 04:45 AM   #3
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750 watts works out to 6.25 amps, probably a little low for startup but most inverters have a surge capacity double the running watts.

If it has a 1500 watt surge it may be able to do the job.

Sorry, no real data on your gear. My 7.5 c.f. RR runs at 1 amp.
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Old 01-30-2016, 05:23 AM   #4
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We had a 1000W inverter (1800W surge) with the Samsung RF197 (predecessor to the RV18) in the motorhome we used to have. There were no problems with compressor startup even with the satellite receiver/DVR operating on the inverter at the same time. IMO, 750W would probably be iffy for compressor start depending on the surge capacity of the inverter.
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Old 01-30-2016, 06:12 AM   #5
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Unfortunately, it does not specify what the surge capacity is. The book is of no help either.
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Old 01-30-2016, 06:37 AM   #6
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The Samsung RF18 fridge uses a Digital Inverter Compressor (DIC) which runs all the time. It does not have the same startup consumption like older fridge compressors have.

It is basically idling at slow speed when no cooling is needed then it will ramp up in speed when more cooling is needed in either the fridge or freezer compartments.

HERE is an article that explains the technology in layman's terms.

Plus here is a comical video of the Samsung DIC Technology.

Unfortunately I do not own the RF-18 but have the older RF-197 so I cannot help you with your power questions. My guess would be that a 1000 Watt PSW Inverter would be the minimum for a fridge.

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Old 01-30-2016, 06:47 AM   #7
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I found your model of Tripp-Lite Inverter and it does have 1500 Watts Boost or surge capacity.

However two people didn't think the unit was worthwhile.

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Old 01-30-2016, 08:22 AM   #8
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That's a little bit of good news about the surge! Thank you. I'm trying to avoid buying a new inverter, but looks like I might have to.
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Old 01-30-2016, 08:49 AM   #9
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Your answer can be found : RV Power Inverter Charger 750W Automatic Transfer Switching Hardwire(RV750ULHW) | Tripp Lite

The Samsung has a lot of electronics. Most recommend a pure sine wave inverter.
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Old 02-07-2016, 11:39 PM   #10
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Good news is I have the job completed. More good news is, the fridge works on my 750 watt inverter. I will test it again once it warms up to see if the additional load on the cooling system will over run the inverter. Thank you for the information everyone provided.
Scott
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Old 02-08-2016, 05:14 AM   #11
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Great to hear it works.

Do you have any Kill A Watt info to share.
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Old 02-08-2016, 07:21 AM   #12
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Funny you mention that. I have one here at the house. When I went to the storage house yesterday, I forgot it at home. I will get it very soon and post it.
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Old 02-08-2016, 10:08 AM   #13
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The most I could get it to show was 170. Here is the running wattage I read today.
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Old 02-08-2016, 10:52 AM   #14
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Well 144 watts equates to 1.2 amps which sounds about right. My RF-97 will display less than 1 amp most of the time unless the compressor is running. Your compressor runs all the time but at idle speed which most likely is the 1.2 amps. When the compressor ramps up you should see a much higher number even higher than 170 I would think.

When making ice cubes your freezer goes into overdrive so that would be a good time to measure what the fridge is doing then.

I monitor the fridge and freezer temps cause that's what I had to do with the NotoCold so I just transferred the sensors over to the RF-197 when that was installed.

When making ice the freezer temps can reach -19F whereas when the ice maker is off it is usually between 0F and -5F.

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