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  #11  
Old 11-23-2021, 11:27 AM
Tymanthius Tymanthius is online now
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Quote:
Originally Posted by Shane826 View Post
Tymanthius- Is that am AC/DC compressor fridge?
That's what it appears to be.
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  #12  
Old 11-23-2021, 01:30 PM
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You're not dense. My thought was using a cutting board to cover the stove top as you see in the picture. That's not my pic, but someone else's. When not cutting stuff on a cutting board, it does make a good stop top cover.
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  #13  
Old 11-23-2021, 02:20 PM
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Your Nova Kool R4500 is indeed a compressor refrig. The specs say that it will use 4.4 amps when running on 12 VDC. This is much less than the 15 or so amps needed by the TM's stock Dometic refrig. In addition, the compressor is much more efficient at producing cold, so it will run much less often. And your Nova Kool does have an automatic low-battery shutoff, which would / should prevent the battery exhaustion problem inherent in the Dometic.

The place where you lose, of course, is that it is a 2-way refrig (no operation on gas) rather than 3-way. Three-way operation requires a different cooling mechanism (absorption rather than compression) that is by definition very inefficient - it is not just the Dometic unit that suffers this limit. Absorption refrigerators were invented 100 years ago, and have continued through the era when solar power was very expensive. Solar power is now quite cheap. I have to believe that 3-way refrigerators will soon be considered a dinosaur, and likely will disappear

If you are talking about using a microwave and an electric skillet, then you are expecting to camp where there is an electric hookup. Once you have a hookup, you don't care what the refrig draws. So as your initial post indicated, your only concern is power while driving. My recommendation, as I mentioned earlier, is simply to turn it off while driving. But since it is going to consume only 50 watts or so, a small solar panel - even 50-75 watts - would keep the TM battery charged while driving, even if the tow vehicle battery doesn't. The panel would have to be mounted on the roof of the TM, of course.

So you have a couple options. A nice situation to be in.

Bill
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  #14  
Old 11-23-2021, 04:35 PM
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Bill- Is the Dometic 3-way fridge as power hungry (especially in 12V mode) as the old Norcold 300.3?
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  #15  
Old 11-23-2021, 05:11 PM
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I have a Dometic RM2354, which is relatively new to the TM line. And yes, it is a power hog, at somewhere between 11 and 15 amps as near as I can tell from various RV discussion boards (Dometic seems reluctant to say). As I recall, the old Norcold 300.3 was spec'ed at about 11 amps. The new Dometic is spec'ed at 3.0 cu ft, while the old Norcold was 2.7 cu ft.

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  #16  
Old 11-23-2021, 11:02 PM
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My Dometic (canít remember the model off hand) only consumes 9-10 amps.

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  #17  
Old 11-23-2021, 11:25 PM
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If you recently purchased a used TM, I recommend getting the battery checked or replaced. Make sure basic maintenance is done, in particular, check out brakes, axle lubrication and tire age. If the tires are over 10 years old and look perfect, replace them. This includes the spare.

We just purchased a new TM 3124. I have 2, 25 foot cords and an adapter to go from the 30A twist lock to 30A park power connector. That way if one cable fails we have a backup. For some camp sites, 25 ft is not long enough. I should probably get some electrical tape to wrap the connection in case of rain. We also have a 12AWG 15A cable that we can use 'just in case 30A is not enough".
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  #18  
Old 11-24-2021, 08:23 AM
Tymanthius Tymanthius is online now
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Quote:
Originally Posted by kjfatl View Post
If you recently purchased a used TM, I recommend getting the battery checked or replaced. Make sure basic maintenance is done, in particular, check out brakes, axle lubrication and tire age. If the tires are over 10 years old and look perfect, replace them. This includes the spare.

We just purchased a new TM 3124. I have 2, 25 foot cords and an adapter to go from the 30A twist lock to 30A park power connector. That way if one cable fails we have a backup. For some camp sites, 25 ft is not long enough. I should probably get some electrical tape to wrap the connection in case of rain. We also have a 12AWG 15A cable that we can use 'just in case 30A is not enough".
I got lucky on this one. The battery is no more than 2 years old, bearings recently packed, one brake replaced (he bought the whole brake before he found out the wires were just clipped, so I have a spare used brake), new shoes on other side, tires still have a few of the new tire dangles on them. Spare too.

I'm thinking of adding a 50' 'spare' 30A line soon, and already have a good 15A extension cord, plus adapters, and a 50A to 30A dogbone.

I've ordered some gaffer's tape to keep in it (and some for home, it's been on the list for a bit), and I'll add some Rescue Tape (silicone tape that only sticks to itself) for water repairs.

But thank you for feeding me ideas! It helps to make sure I'm not missing anything that will be annoying when I'm at a campground.
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