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Old 02-23-2015, 09:09 PM   #1
2 Rivet Member
2015 27' Flying Cloud
maple grove , Minnesota
Join Date: Apr 2014
Posts: 32
Battery knife switch install

Has anyone found a knife switch or similar that can be easily installed on a new flying cloud to disconnect all battery drain while in storage

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Old 02-23-2015, 10:03 PM   #2
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1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,592
There are various battery switches which go on the battery terminals, used mostly by vintage car collectors. The problem with the Airstream battery box is that it has very little extra room inside it to accommodate such a switch. A second issue is that often the switches are not very high quality. And, hate to say it, but if you have the inverter option, you most likely have two sets of heavy cables going to your batteries, one for the normal coach loads and the other for the inverter. Both must be disconnected (usually on the negative side of the batteries).

I like the Perko brand marine battery switches, but they will not fit inside the battery box and even outside mounting is tricky and requires extending cable lengths.

On my FC 20' I put a pair of golf cart batteries in to replace the original #24's which required a lip to deepen the battery box. What I do to disconnect the batteries totally for storage is to remove the connecting cable between the batteries, as it is the easiest one to get to and only takes a couple of minutes and two nuts to be removed.

On my old Argosy, which has batteries inside the trailer, I use a Perko switch as there is a lot more room to work with.

Wish I had a good easy answer for you, but I have not found one.

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Old 02-23-2015, 10:17 PM   #3
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1999 34' Excella
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Round Rock , Texas
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Images: 2
Put a modern switch in your AS... look up 'Perko' .. PERKO Inc.
Peace and Blessings..
WBCCI# 30676
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Old 02-23-2015, 10:57 PM   #4
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2015 25' FB Eddie Bauer
Western , ** Big Sky Country ** Montana
Join Date: Feb 2010
Posts: 2,206
Rotary switch that mounts between the battery post / terminal and the cable works well ... under $10 around here.
~~~~~~ mefly2 ~~~~~>>>
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Old 02-24-2015, 02:43 AM   #5
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2005 19' Safari
Phoenix , Arizona
Join Date: Aug 2004
Posts: 2,359
Marine Battery Isolator Switch

The link below contain details on the Perko marine battery isolator switch that I installed on our 19' Bambi. I did not have to lengthen any cables. However, our Bambi is not equipped with the factory-installed inverter that supplies 120 VAC power when boondocking.

Installation instructions for Marine Battery Isolator Switch
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Old 02-24-2015, 09:30 AM   #6
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1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,592
Phoenix: Any idea why the photos in your post will not show? I would really like to see them and all I get is a little blue box with a ? in it.
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Old 02-24-2015, 11:34 AM   #7
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2007 27' Safari FB SE
Pottsboro , Texas
Join Date: Mar 2007
Posts: 98
I use a pair of these
Name:   ImageUploadedByAirstream Forums1424802703.435742.jpg
Views: 331
Size:  15.9 KB

Since my Airstream is in a storage facility, I remove the knobs and keep them in my truck for added security.
~ Mark
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Old 02-24-2015, 12:02 PM   #8
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1955 22' Flying Cloud
1964 17' Bambi II
Clear Lake Shores , Texas
Join Date: Nov 2013
Posts: 856
Originally Posted by emdubyadee View Post
I use a pair of theseAttachment 233051

Since my Airstream is in a storage facility, I remove the knobs and keep them in my truck for added security.
I use these on my boat when in storage to prevent "phantom" battery drain. Works great and takes up virtually no extra space.
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Old 02-24-2015, 01:12 PM   #9
2005 25' Safari
Beaverton , Oregon
Join Date: Jun 2012
Posts: 41
Battery knife switch

I use a MRTH Battery knife switch on my 2005 Safari. Fits in the battery box just fine. I use it to disengage the power to the solar panels when not in use. You can look at it on the website or I can send you a picture on my installation.


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