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

Thread Tools Search this Thread Display Modes
Old 12-13-2021, 08:59 AM   #1
Rivet Master
GeocamperAS's Avatar
1978 Argosy Minuet 6.0 Metre
Currently Looking...
Wauwatosa , Wisconsin
Join Date: Oct 2010
Posts: 809
12v compressor vs boondocking

Does anyone have experience and/or knowledge of how fast a 12v compressor refrigerator will drain a battery if boondocking?
Judging a person does not define who they are, it defines who YOU are.
GeocamperAS is offline   Reply With Quote
Old 12-13-2021, 09:13 AM   #2
Site Team
richard5933's Avatar

1994 25' Excella
Waukesha , Wisconsin
Join Date: Sep 2020
Posts: 2,871
Images: 4
Lots of variables in this question.

How big the battery bank?

How big the fridge?

It's a math problem. Figure that the fridge will have a 50% duty cycle. Take the usable capacity of the battery bank and divide by the current draw from the fridge.

For example, if you have 200 Ah of capacity in AGM batteries, that gives you a 100-amp usable capacity.

My 12vdc compressor fridge draw approx 5 amps when the compressor is running. Figuring a 50% duty cycle, that means it draws 2.5Ah.

If I had nothing else running (which is never the case) the fridge itself could run for 40 hours on the batteries.

Of course, that doesn't consider the extra load incurred by opening the fridge to retrieve food, cooling down food you bought and put in the fridge, extra load due to warmer weather, etc.

On our coach where we have the 12vdc compressor fridge we boondock quite a bit. If we're careful with things, it we usually consume about 75 Ah in 24 hrs running the fridge, a few LED lights, the water pump, and the roof vent fan. There have been days we've done better and some where we've done worse.

This is all just an example though, as you'll need to calculate your particular situation incorporating whether or not you have solar, how much you draw from batteries for other things, etc.
1994 Excella 25 Follow the build on Gertie!
1999 Suburban LS 2500 w/7.4L V8
1974 GMC 4108a - Custom Coach Land Cruiser (Sold)
richard5933 is online now   Reply With Quote
Old 12-13-2021, 09:23 AM   #3
Half a Rivet Short
2017 30' Classic
2022 Interstate 24X
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 14,177

Compressor fridges average somewhere between 1.5A and 7A "depending". Battery banks can be anywhere from 80AH (= stock flooded cells) usable on up past 400AH ( four lithiums). So:

7A fridge on 80AH battery will be "ok" for about 11 hours.

1.5A fridge on 400AH will do ok for a bit over 11 days.

Very much a "that depends" sort of thing.

uncle_bob is offline   Reply With Quote
Old 12-14-2021, 07:08 PM   #4
Rivet Master
GeocamperAS's Avatar
1978 Argosy Minuet 6.0 Metre
Currently Looking...
Wauwatosa , Wisconsin
Join Date: Oct 2010
Posts: 809
Thanks for the input. I will do my homework.
Judging a person does not define who they are, it defines who YOU are.
GeocamperAS is offline   Reply With Quote
Old 12-14-2021, 07:25 PM   #5
2 Rivet Member
Oak Harbor , wa
Join Date: Mar 2015
Posts: 76
Works for us. We have 400 amp/hrs AGM batteries (200 amp/hrs usable), 400 watts solar. Our NovaKool refer plus electric coffee maker in the AM uses about 70 amp/hrs, then even with partial sun we usually get full charge by end of day. We have not used our generator in over a year, but still carry it in case. We often boondock for a week at a time in Washington state. I'm happy to have stable refer temps in hot or cold weather.
Stormalong is offline   Reply With Quote
Old 12-15-2021, 10:11 AM   #6
3 Rivet Member
1976 Argosy 24
1961 28' Ambassador
1968 26' Overlander
Lakewood , Colorado
Join Date: Jun 2014
Posts: 243
We have gone with a Dometic CRX110, very similar power use to other responders. 250 ah AGM so 125 available. 400 watts solar or 45 amp Boondocker converter. Challenging days are frig and furnace together. Victron BMV 712 is very helpful keeping track of power in and out, gotten down around 60% battery a few times, had to run the generator once in 2 full years of use, around 150 days. Bottom line , if we're careful we can go 3 days batteries only.
Good luck, Mark D
mrdes8 is offline   Reply With Quote


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
Boondocking with a compressor fridge DavidEM Sprinter and B-van Forum 20 03-14-2020 08:24 AM
Viair 88p 12v air compressor. Caffeinated Tires 5 07-14-2016 09:06 AM
Old Norcold 12v fridge compressor KYAirstream Refrigerators 1 03-23-2016 04:40 PM
Good Cheap 12V Air Compressor Suggestions perryg114 Tires 30 01-16-2013 09:55 AM
Review - 12V Central Penumatic air compressor cammur Tires 5 11-17-2007 02:15 PM

Featured Campgrounds

Reviews provided by


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 03:12 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.