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07-07-2020, 10:32 AM
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#1
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2 Rivet Member
2021 28' Flying Cloud
Upland
, California
Join Date: Jan 2020
Posts: 27
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2021 GT Electric Refrigerator and Boondocking
We were hoping to purchase a new 27FB twin GT this fall/winter. We believe a large part of our camping will be state and national parks, with no hook ups. Is an all-electric refrigerator seriously going to limit our boondocking capabilities?
We had already planned on going solar (and now probably with lithium batteries) but I wondering what it's going to take to boondock with ease if the 2021 GTs don't have a propane option? How much solar is it going to take to run that refrigerator (maybe not the freezer) under goldilock conditions? All I know about the frig is it's 12V/110 and almost everything I know about solar and boondocking, I learned on these forums I really don't want to run a generator. Any suggestions about the amount of solar I would need would be much appreciated.
Is it possible to order the 2021 GT with the old refrigerator? Given I could even find a 2020 (plus I only want one air conditioner), does the new composite floor trump a three-way frig? Should I seriously look again at the International, which I believe still has the three-way?
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07-07-2020, 02:37 PM
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#2
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Rivet Master
1973 Argosy 24
Kitchener
, Ontario
Join Date: Jun 2014
Posts: 945
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What have you got against propane? It’s quiet safe and cheap.
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07-07-2020, 03:12 PM
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#3
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2 Rivet Member
2021 28' Flying Cloud
Upland
, California
Join Date: Jan 2020
Posts: 27
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According to what’s new in 2021 for the Globetrotters, “First debuted in the 30RB, the remaining Globetrotter line has also been updated with a new highly efficient compressor style electric (12v/110) refrigerators.”
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07-07-2020, 04:43 PM
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#4
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Overkill Specialist
Commercial Member
2020 30’ Globetrotter
2014 23' International
Dadeville
, Alabama
Join Date: Oct 2015
Posts: 4,516
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Here’s the low down. Fridge is going to pull average of 5.7 amps/hr on daytime mode and 3.7 on nighttime mode. That’s a max of 68.4 watts/hr while running. Let say for this comparison it’s HOT and the fridge runs in day time mode 100% on the time (thats a very high estimate). That’s 68.4 watts per hour. One 100W solar panel will cover this usage during sunlight hours and produce enough storable energy to carry you through the night. I’m adding (2)100W panels on the roof of my 30’GT that will be dedicated to the fridges needs.
I’m adding a total of 1000W to the roof.
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07-07-2020, 06:02 PM
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#5
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Rivet Master
2018 25' International
Slidell
, Louisiana
Join Date: Sep 2017
Posts: 3,725
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Since the all electric refrig uses an efficient compressor, It is not much affected by high ambient temperatures so the duty cycle hot or cool will hover around 50% with normal use. You could talk me into 60% if it is really warm. Thus I would knock the estimate down. I get about 900 Watts per day for the refrigerator.
So you'd need an an additional 120W or more of solar just for the refrigerator. GFML's 200W is a bit conservative but it is not a bad number.
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07-07-2020, 07:04 PM
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#6
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Rivet Master
2019 27' Globetrotter
McHenry
, Illinois
Join Date: Apr 2018
Posts: 2,200
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Kungaloosh, before you get too worried, consider the benefits of the new fridge vs. the old ammonia unit. It’s larger, more efficient and not susceptible to performance issues when the ambient temperature rises. Also, it doesn’t care if the trailer isn’t level.
I’d gladly swap the 3-way from our 2019 27’ FBT Globetrotter but you’d have to do a lot of mods for venting. Honestly, the new fridge is much better as long as you have some solar for boon docking plus you’ll get the new composite floor with a 2021 GT.
We also have two AC units which gets you 50A service which is very handy but your needs might be different. It costs a lot more to add later plus, it’s a good resale feature since the next owner might want to go to the southwest or other areas where you need 2 units. Bonus: You get dual heat pumps with two AC’s.
Congratulations on choosing a GT - we love ours!
-Jeff
__________________
2019 27’ Globetrotter FBT Walnut/Dublin Slate
2018 FC23FB
2019 Ram 2500 6.4 Hemi Laramie Blue Ox 1000#
WBCCI# 10258
RETIRED!
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07-07-2020, 08:40 PM
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#7
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2 Rivet Member
2021 23' Globetrotter
Park City
, Utah
Join Date: May 2020
Posts: 22
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Quote:
Originally Posted by Kungaloosh
We were hoping to purchase a new 27FB twin GT this fall/winter. We believe a large part of our camping will be state and national parks, with no hook ups. Is an all-electric refrigerator seriously going to limit our boondocking capabilities?
We had already planned on going solar (and now probably with lithium batteries) but I wondering what it's going to take to boondock with ease if the 2021 GTs don't have a propane option? How much solar is it going to take to run that refrigerator (maybe not the freezer) under goldilock conditions? All I know about the frig is it's 12V/110 and almost everything I know about solar and boondocking, I learned on these forums I really don't want to run a generator. Any suggestions about the amount of solar I would need would be much appreciated.
Is it possible to order the 2021 GT with the old refrigerator? Given I could even find a 2020 (plus I only want one air conditioner), does the new composite floor trump a three-way frig? Should I seriously look again at the International, which I believe still has the three-way?
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I would also trade the 3-way refrigerator in my 27FB GT 2019 for your all-electric fridge. I don’t boondock. Would also negotiate a credit towards the labor for the swap. I’m located in Park City, UT.
__________________
--Susan
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07-08-2020, 02:31 PM
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#8
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2 Rivet Member
2021 28' Flying Cloud
Upland
, California
Join Date: Jan 2020
Posts: 27
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Thanks for all your replies! At least now i have some numbers to work with.
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07-08-2020, 03:24 PM
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#9
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3 Rivet Member
Bacliff
, TX
Join Date: Dec 2019
Posts: 153
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If the fridge is going to pull average of 5.7 amps/hr on daytime mode and it draws 12v = 68.4 watts per hour. (watts = amps x volts)
If the fridge is going to pull average of 3.7 amps/hr on nighttime mode and it draws 12v = 44.4 watts per hour
If you run it for 12 hours on daytime mode, you will consume 820.2 watt hours
If you run the other 12 hours on nitetime mode, you will consume 532.8 watt hours.
Your total daily consumption is 1353 watt hours.
100 watts of solar sound good in a perfect world - perfect angle of sun, perfect cloudless day, no shading, etc. You will probably not always get that but you can assume that you can get probably 50% so you might consider minimum 200 watts. To be honest, get as much as you can. You might opt for 24v panels as they have advantages. Remember 100 watt is 100 watts regardless of wheter it is 12v, 24v or 120v.
A battery is just a bucket of energy.
Your total daily consumption is 1353 watt hours based on a 12/12 split. More if you run it on daytime mode longer.
That is your daily bucket of energy that you have to fill just for your fridge.
A 100Ah lithium battery will provide 1380 watt hours of energy. That is enough to carry you through 24 hours of no input charge or 2 nights. The thing is that you should fill that bucket up as much as you can, when you can.
So if you are able to put in 100 watts for 12 hours (1200w), that is 820 watts that run the fridge and 380 watts back into the battery. That is a 152 watt hour deficit.
With lithium batteries, you can run them at a partially charged state (90%, 75%, 50%. 30% and lower) indefinitely without damage to the battery. Unlike lead acid/AGM they do not need to be fully charged - ever. So if you go a week, a month or a year without fully charging them - no big deal. Just make sure that you have enough charging capacity to make up for those days where the bucket drains faster than you can fill it. LiFePO4 are 12.8v nominal which means even drained 50%, you still see 12.8v.
Just as with solar, you might consider increasing your lithium battery bank. There are 200Ah, 300Ah and 400ah batteries available.
Lithium Battery suppliers to consider
AMPS Lithium
https://lithiummarinebattery.com
Battleborn
https://battlebornbatteries.com
LiFeBlue Battery
http://www.lifebluebattery.com
ReLion
https://relionbattery.com
Renogy
https://www.renogy.com
SmartBattery
https://www.lithiumion-batteries.com
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07-08-2020, 03:26 PM
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#10
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3 Rivet Member
Bacliff
, TX
Join Date: Dec 2019
Posts: 153
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Correction, 100Ah lithium battery will provide 1280 watt hours of energy, not 1380wh.
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07-08-2020, 06:44 PM
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#11
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4 Rivet Member
2015 28' Flying Cloud
Newtown
, Pennsylvania
Join Date: Jan 2015
Posts: 315
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If it were me, I would definitely bring a generator when boon-docking.
__________________
50 amp, Awning package
2015 Ram 2500 6.7 TD, Blue Ox 1000 lb.
400ah LiFePo4, 800 watts solar, 2x eu2000i Propane
PD9160 converter, Prosine 1800 inverter
2x Victron 100/30 Smart Solar, Victron Smart Shunt
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07-17-2020, 03:06 PM
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#12
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Rivet Master
2021 25' Globetrotter
Jamestown
, Rhode Island
Join Date: Mar 2012
Posts: 1,720
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Quote:
Originally Posted by BayouBiker
Since the all electric refrig uses an efficient compressor, It is not much affected by high ambient temperatures so the duty cycle hot or cool will hover around 50% with normal use. You could talk me into 60% if it is really warm. Thus I would knock the estimate down. I get about 900 Watts per day for the refrigerator.
So you'd need an an additional 120W or more of solar just for the refrigerator. GFML's 200W is a bit conservative but it is not a bad number.
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Having lived with Danfoss 12 volt compressor type refrigerators for 15 years now on our boat (s), I’d worry that duty cycles of 50% are optimistic.
So much depends on insulation, ambient temperature and fridge use (how often it is opened).
I asked this question and someone suggested that I was overestimating the run time. They claim that the amps used were far less. Maybe the refrigerators are exceptionally well insulated?
Our 40’ tug has a Vitrifrigo refrigerator/freezer of about the same size that uses in the order of 100 amp hours a day when in warm climates. As we will apparently be getting a 12 volt/120 volt no propane compressor style in our 2021 Globetrotter, I will be experiencing the use first hand. I sure hope I am wrong!
__________________
Loving our 2021 Globetrotter 25 and our 2022 Ford F-150 King Ranch 5.0!!! Plenty of payload, not even close to axel limits and it drives and rows beautifully…
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07-20-2020, 07:28 PM
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#13
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Rivet Master
2018 27' Globetrotter
Apollo Beach
, Florida
Join Date: Feb 2017
Posts: 1,401
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Quote:
Originally Posted by AstroBruce
If it were me, I would definitely bring a generator when boon-docking.
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I agree. I use three times solar panel wattage as an estimate for solar panel production on a fairly good day of solar. So IF the refrigerator uses 1300W per day as some have estimated, I would want 1300W divided by 3 or about 400W of panels just for the refrigerator. And then what happens on bad solar days? You'd need one 100A lithium battery for each bad day of solar production for the refrigerator alone. I have days where my 600W of solar panels only produce 300W all day! Better have a generator for those days when parked under a considerable canopy of shade trees or a large bank of lithium batteries. Sure I have days where my solar produces 5 times solar panel wattage too, but those are more rare than days where my solar panels produce 1/2 times solar panel wattage due to heavy tree canopy.
I am really not impressed with the three-way refrigerator in my 2018 Globetrotter. The DC option is fairly useless because it draws 14A and runs (almost?) continuously. I wouldn't want to be the first to try boondocking with the new two-way AC/DC compressor refrigerator. I can't wait to see the results of boondocking with solar and the new compressor refrigerator. I hope its as efficient as its specs, but I'm sure glad my refrigerator has the propane option. I still think the best refrigerator for boondocking is the two-way 120V/Propane refrigerator I had in my 2017 Flying Cloud.
__________________
2021 Northern-Lite 10-2 & F350 DRW PSD, 600W Solar/Victron/600A BattleBorn
146 nights 31,000 miles (first 10 months!)
Sold: 2018 GT27Q, 74 nights 12,777 miles
Sold: 2017 FC25FB, 316 nights 40,150 miles
Sold: 2013 Casita SD17 89 nights 16,200 miles
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07-24-2020, 10:47 AM
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#14
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Rivet Master
2018 25' International
Slidell
, Louisiana
Join Date: Sep 2017
Posts: 3,725
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On the larger refrigerators like yours, the DC option is really intended to be used along with the vehicle alternator. Unfortunately most tow vehicles have relatively light gauge trailer wiring and mediocre post battery line voltage (13-13.5 V at the battery 12.5-13.2 at the trailer) so the while the refrig is on 12V, the trailer batteries are not likely to remain fully charged (85-90% max). For those with a large three way frig who want to use 12V while towing, you should consider a DC to DC converter to raise the voltage a bit. The old way of wiring directly to the alternator is more hassle so I don't recommend it.
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07-24-2020, 04:46 PM
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#15
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Rivet Master
2016 30' International
redondo beach
, California
Join Date: Feb 2017
Posts: 772
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Nothing worse than the perfect campsite and your neighbor has to run a generator all day to operate the fridge.
If it is really hot you want to find shade, not direct sun to power the fridge.
If there is rain and short days, forget about solar.
I'll stick with the propane fridge that will operate for months, and only use the generator as a very last resort to charge depleted batteries which is rare because we usually run out of water first.
__________________
Randy and Beth 15 F250, 16 30' International, ProPride, Dexter 3" lift, Michelin 16, Dill TPMS, Centramatics, Battleborn x4, Victron BMV and 1.2KW inverter, Orion DC/DC, BlueSolar MPPT, 300W solar, Alpine iLX, Polk MM1, Samsung smart 42"
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10-12-2020, 04:53 PM
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#16
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1 Rivet Member
2018 22' Sport
Manchester
, Connecticut
Join Date: May 2018
Posts: 11
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Quote:
Originally Posted by Bruce B
Having lived with Danfoss 12 volt compressor type refrigerators for 15 years now on our boat (s), I’d worry that duty cycles of 50% are optimistic.
So much depends on insulation, ambient temperature and fridge use (how often it is opened).
I asked this question and someone suggested that I was overestimating the run time. They claim that the amps used were far less. Maybe the refrigerators are exceptionally well insulated?
Our 40’ tug has a Vitrifrigo refrigerator/freezer of about the same size that uses in the order of 100 amp hours a day when in warm climates. As we will apparently be getting a 12 volt/120 volt no propane compressor style in our 2021 Globetrotter, I will be experiencing the use first hand. I sure hope I am wrong!
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Have you received your GT yet and have you gained bany experience on the electrical usage? We’re trying to decide on a 2021 GT 27 fb. Need to pin down this fridge issue b4 we commit
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10-12-2020, 05:15 PM
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#17
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Rivet Master
2018 25' International
Slidell
, Louisiana
Join Date: Sep 2017
Posts: 3,725
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MBRIGOS, I would use the published current draws and assume a 50% duty cycle. You will get close to your actual experience. You can get the duty cycle down to about 40% if you never open the door but that kinda defeats the purpose.
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10-12-2020, 07:18 PM
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#18
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Rivet Master
2019 27' Flying Cloud
Kansas City
, Missouri
Join Date: Apr 2014
Posts: 1,968
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Why Worry? Go with Low Tech Proven Option
I can say that we have had a 22, 25, and now a 27 all with the refrigerators that run on propane
I am happy to have the propane options because it seems simple.
But, with all 3 we found that the real deal for fail safe food safety is a Yeti cooler. Especially if boon docking and no ability to run AC which can make the fridge's job easier.
We travel to National Parks most summers and on those long trips will have a Yeti 45 with dry ice and frozen meat, and a Yeti 105 with blocks of water ice and refrigerator foods. We use the airstream fridge for whatever we have gotten into and do run a generator to keep our standard water batteries charged.
IMHO the one-time expense of the Yeti is more than offset in savings on a 2 week vacation and cooking in vs eating out. We usually bring all our food and eat out very rarely on trips.
__________________
Piggy Bank
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10-12-2020, 08:24 PM
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#19
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Rivet Master
2020 23' Flying Cloud
2019 22' Sport
Sebastian
, Florida
Join Date: Nov 2019
Posts: 1,234
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Kungaloosh, I am puzzled by by the emphasis on off grid camping. We are based in the SE, and it is hard to find a developed site here without electricity. This is due in large part to the HUMIDITY, but we found it necessary to run the air while traveling in your part of the country as well. Alternating in sites with electricity every few days would reduce your worries and maybe make your trips more enjoyable overall.
Generators? Nobody likes them. If you aren’t wedded to your AC and Microwave and other electric only heat, you can get by with a small (quieter, less back strain) propane powered (less maintenance and no smelly gas container) unit to run a few hours in the early evening to top off the batteries. Try boondocking in your driveway to figure out what will work for you.
Don’t lock yourself in to one approach before you even have the trailer!
__________________
-Don
(That man in that tiny can)
(Same man, Bigger can)
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10-14-2020, 10:32 AM
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#20
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2 Rivet Member
2021 28' Flying Cloud
Upland
, California
Join Date: Jan 2020
Posts: 27
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Thank you for everyone's suggestions and responses. So here's my update...this Saturday my husband and I ordered our Airstream. We are very excited, but it turned out to be not exactly what we had planned! When we walked on the lot, thinking they had a GT 25FB twin, that was not the case. Instead we saw a model that we had somehow bypassed in all our five years of visiting the lots--the Flying Cloud 28RB twin. We loved the separate dinette, the new interior with the square sink, the refrigerator that still could run on propane, and the lower weight and price tag! Added awnings and solar and we are pretty satisfied. We are hoping for delivery sometime in January and looking forward to seeing you out there!
Caroline
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