Residential vs Gas/Electric Fridge?
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May-24-2022 09:47 AM
What I am trying to figure out is whether we could run a residential fridge on an inverter and a couple 100ah deep cycle lithium batteries for a week or so?
Combined with some solar charging and a small portable generator to help keep the batteries charged up.
Any thoughts on which type of fridge you'd recommend?
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Jun-01-2022 05:48 AM
Steve
2016 Cougar 330RBK
1991 Slumber Queen WS100
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May-31-2022 10:56 AM
StirCrazy wrote:Cptnvideo wrote:
Our consumed amp hours last night - 230 ah. About 10 minutes of microwave, normal evening TV, LP furnace blower, etc. We're currently at 7850' elevation on the Mogollon Rim in AZ, so nights get pretty chilly.
wow, thats a lot of power usage. I use about 80-90AH at -5C (23F) with using the kurieg in the evening for coffee, some times a movie, but no fridge draw would be the difference I guess. what do you do if you hit 4 or 5 days of no sun?
Steve
Well, after doing some calculating, we actually are about the same.
Our residential fridge consumes 569 KWH annually according to the energy sticker. That works out to 1559 WH per day. Divided by 13 (average battery voltage) yields 120 AH per day.
10 minutes of microwave = 21 AH
So 230 minus 120 minus 21 = 89 AH per day.
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May-30-2022 08:02 PM
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May-28-2022 07:27 AM
Cptnvideo wrote:
Our consumed amp hours last night - 230 ah. About 10 minutes of microwave, normal evening TV, LP furnace blower, etc. We're currently at 7850' elevation on the Mogollon Rim in AZ, so nights get pretty chilly.
wow, thats a lot of power usage. I use about 80-90AH at -5C (23F) with using the kurieg in the evening for coffee, some times a movie, but no fridge draw would be the difference I guess. what do you do if you hit 4 or 5 days of no sun?
Steve
2016 Cougar 330RBK
1991 Slumber Queen WS100
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May-27-2022 09:43 AM
We have a 20 cf res fridge and we can boondock indefinitely (our limitation is holding tanks). See signature for equipment.
Our consumed amp hours last night - 230 ah. About 10 minutes of microwave, normal evening TV, LP furnace blower, etc. We're currently at 7850' elevation on the Mogollon Rim in AZ, so nights get pretty chilly.
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May-26-2022 07:59 AM
valhalla360 wrote:FootSoldier wrote:
If we chose the residential fridge, the trailer comes with a small solar package and a 2000w inverter. I think that will get us as close to the best fit we could hope for, at least to start.
How big is the solar package?
Our current rig has a "solar package"...all of 50w solar and a single trolling battery. Great for storing the rig over the winter but not much else.
Added a second battery and a portable 100w panel to keep the 12v fridge running (still have to be careful of other 12v loads). Plus if it's actually hot, we pull out the generator. If it's cool out, the fridge takes less power to keep cold.
The trailer solar package is 190w roof top panel and a 2000w inverter wired to the fridge and selected outlets, including the entertainment center. I think the 2000w inverter will do what we need, but I would add at least another 200w panel and 200ah of lithium battery.
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May-26-2022 05:19 AM
FootSoldier wrote:
If we chose the residential fridge, the trailer comes with a small solar package and a 2000w inverter. I think that will get us as close to the best fit we could hope for, at least to start.
How big is the solar package?
Our current rig has a "solar package"...all of 50w solar and a single trolling battery. Great for storing the rig over the winter but not much else.
Added a second battery and a portable 100w panel to keep the 12v fridge running (still have to be careful of other 12v loads). Plus if it's actually hot, we pull out the generator. If it's cool out, the fridge takes less power to keep cold.
Ford F250 V10
2021 Gray Wolf
Gemini Catamaran 34'
Full Time spliting time between boat and RV
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May-26-2022 05:15 AM
BurbMan wrote:valhalla360 wrote:
....only issue with keeping ice cream more than a few days in our prior propane units...had to do with eating it not keeping it cold...
Right there with ya on that one!valhalla360 wrote:
12v DC fridges are not a new technology. They have been in use in the marine industry for years. Similar power limitations as RVs but when sailing, the boat is often heeled over 15-20degrees making a propane unit not so functional.
Also, propane is never allowed in boat galleys because it's heavier than air and can settle in the hold if there is a leak. Most boats run a genset that powers the fridge, cabin a/c, and electric stovetop.
Actually, propane is by far the most common option in boat galleys. Electric is actually the outlier, though it is becoming more common as big solar/battery systems become more practical and cheaper. There are some special considerations using propane on boats but very common.
We had a propane fridge on one of our boats (original equipment) but it was a catamaran, so no heeling to deal with. The others we 12v (one had a 2nd compressor directly powered by a belt on the engine but it was an antiquated system.)
Ford F250 V10
2021 Gray Wolf
Gemini Catamaran 34'
Full Time spliting time between boat and RV
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May-25-2022 01:03 PM
Second Chance wrote:
...We don't boondock and have no expectations of running an AC without shore power, but the solar/battery combination will run the refrigerator indefinitely... as long as the sun shines every day. More batteries and solar would overcome that situation. We have had very long (12-hour) travel days with overcast and drizzle and the batteries were still almost fully charged on arrival at the next destination. There's no way we would go back to an absorption refrigerator. Of course, there are those who are fully on the other side of the fence - it all depends on how you use your RV and your expectations.
Rob
I think this will be us. The 5er we are gravitating toward actually has 3 A/C units and I'm not really interested in running a big generator. So it's plug-in and have A/C, or there won't be A/C.
I don't see us pulling this rig out into the woods somewhere, it will probably always be in some kind of developed facility. Somewhere along the way I got old and this rig is going to be all about convenience and ease.
We do have a few favorite Forest Service campgrounds that we'd fit into, but getting a hookup won't always be possible. So I am thinking a combination of a little more battery, solar, and my little Honda gen to top things off or handle coffee in the morning will work for stays without a hookup?
Our little Rockwood Roo has a propane fridge that has served us pretty well. It won't freeze food, but it will keep it frozen to semi-frozen for a week. Ice cream is not going to make it more than a couple days.
If we chose the residential fridge, the trailer comes with a small solar package and a 2000w inverter. I think that will get us as close to the best fit we could hope for, at least to start.
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May-25-2022 10:35 AM
valhalla360 wrote:
....only issue with keeping ice cream more than a few days in our prior propane units...had to do with eating it not keeping it cold...
Right there with ya on that one!
valhalla360 wrote:
12v DC fridges are not a new technology. They have been in use in the marine industry for years. Similar power limitations as RVs but when sailing, the boat is often heeled over 15-20degrees making a propane unit not so functional.
Also, propane is never allowed in boat galleys because it's heavier than air and can settle in the hold if there is a leak. Most boats run a genset that powers the fridge, cabin a/c, and electric stovetop.
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May-25-2022 07:56 AM
Rob
2020 Solitude 310GK-R
MORryde IS, disc brakes, solar, DP windows
(Previously in a Reflection 337RLS)
2012 F350 CC DRW Lariat 6.7
Full-time since 8/2015
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May-25-2022 07:41 AM
2016 Cougar 330RBK
1991 Slumber Queen WS100
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May-25-2022 07:20 AM
We did go to Alaska in '15' so I picked up a couple 3000 watt generators. Only used one at a time as charging the battery, morning toast and coffee, and time in the evening movie and more battery charging.
We returned to Alaska in '18' with our present rig with a residential fridge. We boondocked 12 weeks while we were there and ran the generator daily. Besides the fridge we also have a 5.5 cu ft freezer which is not on a inverter so requires a reliable source of power.
Down here in the lower 48 there are a few locations that require us to use the generator. We only have 2 6 volt batteries so daily recharging is a necessity.
FULLTIME SINCE 2010
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John
“A good traveler has no fixed plans, and is not intent on arriving.” Lao Tzu
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May-25-2022 06:47 AM
2112 wrote:
We have no problem making ice or keeping ice cream solid for weeks but a larger freezer volume would be nice. We are very limited to what we can put in the freezer.
Exactly our experience with an "electric/propane" refrigerator, and we are also from Texas.