Thread Tools Search this Thread Display Modes
Old 06-30-2003, 11:43 AM   #1
2 Rivet Member
rdm's Avatar
Join Date: Feb 2002
Posts: 83
Question Fridge replacement/ Inverter needs

We have decided to replace our expired dometic fridge with a apartment sized unit from LG Appliance. This unit will run ac when plugged in or with the gennie running. We want to add an inverter to power the fridge while driving during the day.

How large a inverter can we put in without having to increase the coach batteries in size and number.

Also can you suggest a good make of inverter.

The fridge is rated 115V 60hz 1.5 Amp


rdm is offline   Reply With Quote
Old 08-28-2003, 05:26 PM   #2
1 Rivet Member
Join Date: Aug 2003
Posts: 17

There is a site call they have inverter and battery eliminator and if you get to the site look at the battery tutorial great reading. Andre

Andre Baillargeon is offline   Reply With Quote
Old 08-28-2003, 08:03 PM   #3
Moderator Emeritus
Pick's Avatar
1972 31' Sovereign
High Springs , Florida
Join Date: May 2002
Posts: 2,310
Images: 36
Send a message via AIM to Pick
RDM, look at the power specs for the fridge. You will find "LRA" or Locked Rotor Amperes rating. This also equates to the starting current. My fridge is rated at 1.9 amps and LRA of 9 amps. A 400 watt/ 800 watt Vector will NOT start the compressor. At 1.9 amps, I think a 95AH battery will SAFELY run it 2 hours.
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
Lots of Hot Sauce!
Air # 283
WBCCI 1350
Pick is offline   Reply With Quote
Old 08-28-2003, 08:46 PM   #4
3 Rivet Member
Join Date: Aug 2003
Posts: 158
Send a message via Yahoo to Fun-Lovin
I did some checking on this myself and contacted the manufacture of the Fridge Im currently looking to purchase. It shows a .95 amp draw on the back of the unit but they told me it requires 1.4 amps continuious and 4.6 amps to start the compressor. I asked them about using an inverter and was told that it requires 1400 watts minimum. I would recomment going to one of the boating suppliers for a good high current interter.

Best of luck,
Fun-Lovin is offline   Reply With Quote
Old 01-20-2004, 06:04 PM   #5
2 Rivet Member
Join Date: Jan 2004
Posts: 57
Images: 3
I guess it is the electrical engineer in me that makes me want to reply. First, the inverter has many useful purposes but running a compressor is not one of them. A Compressor has a starting load and depends on a exact sine wave uniform operating signal. Though,inverters are getting better at this, the first bunch were really were only square wave generators. They are not suitable for running motors and will quickly burn them up. Getting a high current sine wave inverter that will run a compressor is very expensive and not very practical. The next problem is finding a battery which can supply the current needed to run a fridge and the inverter. If you need 5 Amps continuious at 120VAC then that means you need about 50 amps continuious at 14VDC. You can imagine how long your battery will carry that load on a charge. An AC generator produces a good sine wave and is a lot cheaper. Even bypassing your problem of 50 Hz which should not be overlooked, the real solution is a LP refrigerator which uses about the same amount of energy to do the same thing. It is quite convenient for MH and Campers though. I know that this is not what you want to hear. Ice is also a good energy storage source and people who want to avoid LP camping in this country choose to plug into the mains at campgrounds. My engineering jobs took me through a stint with Gas refrigeration, other types of refrigeration, and solar. No easy answer yet.
RonJudi 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
Electric or Gas electric fridge replacement?? tin can luv Refrigerators 26 03-22-2004 09:50 AM
Let's start with the Fridge.... GT1963 Refrigerators 6 03-03-2004 09:01 PM
what should I do with my dead fridge Swingking Refrigerators 12 11-25-2003 01:45 PM
First pipes now fridge... overlander76 Refrigerators 8 11-24-2003 01:46 PM
Got my fridge repaired Stefrobrts Refrigerators 2 10-31-2003 12:12 AM

Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:59 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.