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Old 07-20-2020, 07:28 PM   #61
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Our new unit in the way to us will come with a Norcold 10cu ft 12v dc fridge. Iím still trying to figure out how my h solar power Iíll need to handle the 5.7 day time amp draw. Nite time it switches to 3.7a for 8 hrs.
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Old 07-20-2020, 08:36 PM   #62
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Our new unit in the way to us will come with a Norcold 10cu ft 12v dc fridge. Iím still trying to figure out how my h solar power Iíll need to handle the 5.7 day time amp draw. Nite time it switches to 3.7a for 8 hrs.
Why would it draw specific amount differently during the day or night. I understand that ambient temperature determines how much energy is required to cool it, but do they claim to know exactly how much that is?
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Old 07-20-2020, 08:50 PM   #63
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It has a night time mode which assumes lower ambient temperatures and fewer openings.
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Old 07-20-2020, 10:28 PM   #64
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It has a night time mode which assumes lower ambient temperatures and fewer openings.
You have a link to the manual for your fridge?
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Old 07-20-2020, 10:54 PM   #65
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Fridge link

Yep. Here it is.
https://norcold.com/wp-content/uploa...D_20191213.pdf
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Old 07-20-2020, 11:46 PM   #66
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Most/all 120v residential refrigerators have an inverter in the R/V to run the refrigerator. I've never seen one that didn't but I'll never say never.
The standard refrigerator on my KZ is a 120 compressor refrigerator. Which I think is ridiculous for that type of trailer. There is no inverter or even solar prep. I got one of the few that has the optional 2 way absorption refrigerator, which is essential for dry camping without a generator. What's really nice about it is that it has no PC board, so doesn't need any power to run on propane.
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Old 07-21-2020, 12:10 AM   #67
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The standard refrigerator on my KZ is a 120 compressor refrigerator. Which I think is ridiculous for that type of trailer. There is no inverter or even solar prep. I got one of the few that has the optional 2 way absorption refrigerator, which is essential for dry camping without a generator. What's really nice about it is that it has no PC board, so doesn't need any power to run on propane.

Iíve been RVing for years but Iím completely new to the solar/inverter world. So new that I donít even know what I donít know. From what Iíve been reading, it seems like these 12 volt compressor refrigerators are really 120 AC units. When youíre not on shore power The inverter transforms the 12vdc battery
voltage to into AC is what Iím understanding. So why they call them dc refrigerators is a bit of a misnomer.

I know my rig will be arriving with an inverter and a solar ready set up. Since I do a fair bit of dry camping seems to me like my best bet is investing in a 200 watt portable folding solar panel to keep the batteries charged when I wonít have the genny with me.

Reasonable approach??
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Old 07-21-2020, 12:23 AM   #68
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Iíve been RVing for years but Iím completely new to the solar/inverter world. So new that I donít even know what I donít know. From what Iíve been reading, it seems like these 12 volt compressor refrigerators are really 120 AC units. When youíre not on shore power The inverter transforms the 12vdc battery
voltage to into AC is what Iím understanding. So why they call them dc refrigerators is a bit of a misnomer.

I know my rig will be arriving with an inverter and a solar ready set up. Since I do a fair bit of dry camping seems to me like my best bet is investing in a 200 watt portable folding solar panel to keep the batteries charged when I wonít have the genny with me.

Reasonable approach??
There are some that are true 12VDC compressors. That is the one I would get. I know the everchill has an inverter inside it.
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Old 07-21-2020, 12:30 AM   #69
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Yes, the Norcold unit that will be in my rig is a true 12vdc unit as well. Similar to the Everchill
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Old 07-21-2020, 12:36 AM   #70
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Yes, the Norcold unit that will be in my rig is a true 12vdc unit as well. Similar to the Everchill
I am pretty sure the Everchill has an inverter. Someone already posted a diagram of one showing it.
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Old 07-21-2020, 12:43 AM   #71
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Looks like that night mode reduces the compressor speed and fan speed.

Will be interesting to see how you like it.
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Old 07-21-2020, 12:44 AM   #72
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If I’m reading this manual correctly on the NORCOLD unit, does not have an inverter in it. But you guys who are way smarter than me can tell me Here’s the link.
https://norcold.com/wp-content/uploa...D_20191213.pdf
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Old 07-21-2020, 12:46 AM   #73
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If Iím reading this manual correctly on the NORCOLD unit, does not have an inverter in it. But you guys who are way smarter than me can tell me Hereís the link.
https://norcold.com/wp-content/uploa...D_20191213.pdf
Seems like a 12V compressor to me. Would be harder to make it a variable speed if it was 120VAC
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Old 07-21-2020, 05:59 AM   #74
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Seems like a 12V compressor to me. Would be harder to make it a variable speed if it was 120VAC
Hence reefers with AC compressors and built in variable frequency inverters...
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Old 07-21-2020, 10:50 AM   #75
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Looks like that night mode reduces the compressor speed and fan speed.

Will be interesting to see how you like it.
Allowing the compressor and fan to run slowly is good but I'd think the thermostat could manage that, night or day. Why not permit it to run slowly during the day if the delta T permits? Why not run it fast at night if required?
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Old 07-21-2020, 11:13 AM   #76
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Allowing the compressor and fan to run slowly is good but I'd think the thermostat could manage that, night or day. Why not permit it to run slowly during the day if the delta T permits? Why not run it fast at night if required?
Kinda a strange idea. either the reefer is controlled by the thermostat...or it isn't. A night mode that runs slower and has lower fan speed would presumably break the connection with the thermostat and allow temperatures to rise. Otherwise, as you say, why not during the day if you don't open the box?

The Q&A and answers from the tech support community leads me to believe that there is an awful lot of "marketing" here. RV always have 12 volts and manufacturers want to drop LP reefers for cost. This is a perfect solution that lowers cost and does not require an inverter.
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Old 07-21-2020, 11:57 AM   #77
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Allowing the compressor and fan to run slowly is good but I'd think the thermostat could manage that, night or day. Why not permit it to run slowly during the day if the delta T permits? Why not run it fast at night if required?
If you read the manual, its for noise. Its a button you press before you go to bed and it comes out of that mode in 8 hours. It's optional to use.
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Old 07-21-2020, 11:58 AM   #78
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Hence reefers with AC compressors and built in variable frequency inverters...
We are talking about an RV fridge here.
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Old 07-24-2020, 05:34 PM   #79
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Ignore my previous post on the 12 volt fridge, Our Grey Wolf was bought new in March and it crapped out this weekend. Deader than fried chicken, checked the fuses, all is well, The light isn't even on. Had to go get a mini-fridge from wal mart just to finish the trip. I guess I'll keep this in the truck because I don't know if I can trust RV fridges any more.
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Old 07-24-2020, 06:39 PM   #80
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Slammer... what brand is yours?
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