Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-07-2024, 08:59 AM   #1
4 Rivet Member
 
2023 27' Globetrotter
Williamsburg , Virginia
Join Date: Jan 2014
Posts: 423
Appliance Power Consumption

There is a lot on this subject in the forums, including spreadsheets...some of it is old, however. I have a '23 GT27, with 2 x 100aH Battleborn lithiums, and 300 watts of solar on the roof. I also have a Honda 2200 propane-fueled generator.

My question is, what should I expect when boon docking in hot/humid locations when my nighttime draws are the Norcold fridge in night mode, my Fantastic Fan, and a small oscillating fan (which would require the inverter)? And is there an updated list of appliance consumption?
AgBullet is offline   Reply With Quote
Old 06-07-2024, 09:43 AM   #2
Site Team
 
richard5933's Avatar

 
1994 25' Excella
Waukesha , Wisconsin
Join Date: Sep 2020
Posts: 5,880
Images: 5
The best way to track this is with a shunt-based monitor which will count the amps in/out of the batteries. To calculate the fridge's use you'll have to know the duty cycle (how much of the time the compressor(s) actually run, and this will vary on the weather as well as a few other factors.

The 12vdc fridge I had in my previous rig consumed just under 6a when the compressor was running, which averaged to about 50% of the time. More in hot/humid weather or if we were in the fridge a lot.

One thing from your list that I'd suggest is finding a 12vdc fan instead of the 120v model. It will require running your inverter, and just running your inverter consumes power. Then you have to consider that the inverter is not a perfect system, with a loss in the conversion from 12vdc to 120vac.

In my experience we always did better when we found devices which natively work on 12vdc when trying to maximize our battery bank's power capacity. It's surprising what the consumption of 120vac appliances is when powered via the inverter. We've got a couple of DC fans - one plugs into a USB outlet and the other into the 12vdc outlet (the one that looks like a cigarette lighter socket). Both are much more efficient than the 120vac fans we could find since they are designed to be used in vehicles/RVs.
__________________
Richard
11018
1994 Excella 25 'Gertie' Follow the build on Gertie!
1999 Suburban LS 2500 w/7.4L V8 'Bert'
1974 GMC 4108a - Custom Coach Land Cruiser 'The Bus' (Sold)
richard5933 is offline   Reply With Quote
Old 06-07-2024, 09:47 AM   #3
Rivet Master
 
2007 16' International CCD
Vintage Kin Owner
Somewhere , Colorado
Join Date: Dec 2010
Posts: 1,653
2X on the shunt based monitor suggestion. They don’t cost much, and you can monitor each of your devices first hand, and not rely on reports of others. You can also track and learn your daily usage under different environmental conditions. Plus, they are fun!
field & stream is offline   Reply With Quote
Old 06-07-2024, 02:37 PM   #4
Rivet Master
 
JeffKim's Avatar

 
2023 25' Globetrotter
2021 16' Bambi
Forest Lake , Minnesota
Join Date: Mar 2021
Posts: 1,244
Quote:
Originally Posted by field & stream View Post
2X on the shunt based monitor suggestion. They donít cost much, and you can monitor each of your devices first hand, and not rely on reports of others. You can also track and learn your daily usage under different environmental conditions. Plus, they are fun!
I'd go one step further and put in as many Victron Smart devices as you can (I'm up to 6) and you'll never get bored camping while tracking stuff.
__________________
2023 Globetrotter 25FBT "Curly"
2017 Audi Q7 3.0T
WBCCI 6343
JeffKim is offline   Reply With Quote
Old 06-07-2024, 03:09 PM   #5
4 Rivet Member

 
2022 25' Flying Cloud
Tualatin , Oregon
Join Date: Apr 2021
Posts: 343
My favorite fan, quiet and runs all night and longer. Charges from 5v USB port, will run while plugged in:

https://www.amazon.com/gp/product/B08866RDYK/


Steve
TitusNW is offline   Reply With Quote
Old 06-07-2024, 05:09 PM   #6
4 Rivet Member
 
2023 27' Globetrotter
Williamsburg , Virginia
Join Date: Jan 2014
Posts: 423
Quote:
Originally Posted by TitusNW View Post
My favorite fan, quiet and runs all night and longer. Charges from 5v USB port, will run while plugged in:

https://www.amazon.com/gp/product/B08866RDYK/


Steve
Thanks for the tip! Agree with Richard that I should keep the appliances as native 12v as possible. Any ideas on what the Fantastic Fan draws at each of its three speeds?
AgBullet is offline   Reply With Quote
Old 06-07-2024, 07:30 PM   #7
4 Rivet Member

 
2022 25' Flying Cloud
Tualatin , Oregon
Join Date: Apr 2021
Posts: 343
Something less than 4amp (the fuse on the fan)
However if you get a Buss GTC CT6100 Fuse Socket Extension it's amazing what you can read with a DC clamp-on ammeter. Crimp a couple of connectors onto two wires and make the setup on the left. Pull any DC fuse and plug in the Socket Extension and you'll be able to measure any load from any DC circuit.

Steve
Attached Thumbnails
Click image for larger version

Name:	Buss Fuse Extension DC Current.jpg
Views:	9
Size:	261.8 KB
ID:	444100   Click image for larger version

Name:	Buss GTC CT6100 Fuse Socket Extension.jpg
Views:	5
Size:	15.4 KB
ID:	444101  

TitusNW is offline   Reply With Quote
Old 06-07-2024, 07:51 PM   #8
Rivet Master
 
JeffKim's Avatar

 
2023 25' Globetrotter
2021 16' Bambi
Forest Lake , Minnesota
Join Date: Mar 2021
Posts: 1,244
Quote:
Originally Posted by AgBullet View Post
Thanks for the tip! Agree with Richard that I should keep the appliances as native 12v as possible. Any ideas on what the Fantastic Fan draws at each of its three speeds?
Well, I thought that is an interesting question and putting my money (shunt) where my mouth is I went out to the camper, unplugged the 15A cord and ran the fan at the three speeds. First is the baseline, something was drawing 10W. Speed 1 is 17W, then 25W, and 35W.

So, if you wanted to run the fan at full blast it would consume a 100Ah (1200Wh) battery in 34 hours.
Attached Thumbnails
Click image for larger version

Name:	IMG_8702.PNG
Views:	4
Size:	61.7 KB
ID:	444106   Click image for larger version

Name:	IMG_8703.PNG
Views:	2
Size:	62.0 KB
ID:	444107  

Click image for larger version

Name:	IMG_8704.PNG
Views:	8
Size:	61.8 KB
ID:	444108   Click image for larger version

Name:	IMG_8705.PNG
Views:	8
Size:	62.2 KB
ID:	444109  

__________________
2023 Globetrotter 25FBT "Curly"
2017 Audi Q7 3.0T
WBCCI 6343
JeffKim is offline   Reply With Quote
Old 06-08-2024, 10:20 AM   #9
4 Rivet Member
 
2023 27' Globetrotter
Williamsburg , Virginia
Join Date: Jan 2014
Posts: 423
Quote:
Originally Posted by JeffKim View Post
Well, I thought that is an interesting question and putting my money (shunt) where my mouth is I went out to the camper, unplugged the 15A cord and ran the fan at the three speeds. First is the baseline, something was drawing 10W. Speed 1 is 17W, then 25W, and 35W.

So, if you wanted to run the fan at full blast it would consume a 100Ah (1200Wh) battery in 34 hours.
Thanks, Jeff! Very helpful.
AgBullet is offline   Reply With Quote
Old 06-12-2024, 10:37 AM   #10
1 Rivet Member
 
2021 25' Flying Cloud
Cedar Rapids , Iowa
Join Date: Jul 2023
Posts: 13
Just today I got an email from airgear on simple explanation on Inverter usage. Link below.

https://mailchi.mp/airgear/the-inver...w?e=7071c3d7b1
__________________
Mark Franke
2021 Flying Cloud 25FB
MarkFranke is offline   Reply With Quote
Old 06-12-2024, 02:37 PM   #11
3 Rivet Member
 
2018 30' Classic
2004 30' Classic
1972 Argosy 22
Meridian , Idaho
Join Date: Nov 2017
Posts: 146


12V fans

Another option for a 12v fan. Go to Amazon and search for Marine fan. They have, among the bilge pumps, hard mounted 3 speed multi directional fan in black or white.
I mounted one on the underside of bedroom overhead cabinet of our 30' Classic. The boss loves it.
cbburke is offline   Reply With Quote
Old 06-12-2024, 05:17 PM   #12
Rivet Master
 
2022 27' Globetrotter
DALLAS , TX
Join Date: Apr 2022
Posts: 1,580
Quote:
Originally Posted by cbburke View Post
Another option for a 12v fan. Go to Amazon and search for Marine fan. They have, among the bilge pumps, hard mounted 3 speed multi directional fan in black or white.
I mounted one on the underside of bedroom overhead cabinet of our 30' Classic. The boss loves it.
Hella marine fans. Installed 2 of them, one over each twin bed. Each of them burns 0.25A at 12v running full blast. Very efficient.

I used them for 15 years on our sailboat. They are bulletproof.
foobar is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Solar, battery, and power consumption questions switters Boondocking 22 08-05-2020 07:36 AM
12 Volt Power Draw by Appliance. PB_NB Electrical - Systems, Generators, Batteries & Solar 4 07-21-2020 12:07 PM
Lowest power consumption microwave TouringDan Batteries, Univolts, Converters & Inverters 16 12-07-2016 06:26 AM
Power consumption for a refrigerator Dbones Member Introductions 9 03-09-2015 10:35 PM
Power consumption of various 12 volt items guy99 Batteries, Univolts, Converters & Inverters 19 10-18-2008 06:07 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 05:29 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.