Thread Tools Search this Thread Display Modes
Old 07-20-2016, 10:44 AM   #15
Rivet Master
Al and Missy's Avatar

2002 30' Classic S/O
Melbourne Beach , Florida
Join Date: Nov 2013
Posts: 1,483
Originally Posted by Pongo View Post
When I saw the original post, which expressed concern regarding solar hub gauge waiting, I contacted my dealer. (I've a 2017 International Serenity 27FB on order, with 160W solar on the roof and 160W of portable via the front solar connector for use in shade).

An Airstream electrical engineer responded back straight away. It's been a long time since I was a practicing electrical engineer, but I'm comfortable with his response. I've pasted a copy of his response below:
It is interesting that, despite his response, if you look at the table in the reference it clearly states that #10 wire in a power transmission application is rated for 15 amps.

His response is based on what is safe for the wire. Ampacity is a term from the National Electrical Code and is predominantly about AC power distribution in homes, businesses and industrial applications. It is essentially the electrical building code.

Lew has it right, as usual. Voltage drop in wires is all about resistance and current. The voltage drop in a wire at a particular wire size and current will be the same in a 12V circuit as a 120V circuit, but proportionally it is 10x larger in the 12V circuit. Depending on the charge controller, the impact can be even greater.

Series connection can help, but makes the shading problem worse. If I install solar, I will be replacing the existing wiring and running panels in parallel.



"You cannot reason someone out of a position they have not been reasoned into"

Al, K5TAN and Missy, N4RGO
2002 Classic 30 Slideout
2001 Safari 25 RB Twin (Gone, but not forgotten)
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
WBCCI 1322, TAC FL-39, AIR 82265

Al and Missy is offline   Reply With Quote
Old 07-20-2016, 11:38 AM   #16
2 Rivet Member
2012 25' FB Flying Cloud
Lexington , Kentucky
Join Date: Oct 2002
Posts: 92
Images: 2
It looks like to me the Airstream engineer above is using 120v values for his conclusion. Does anyone agree that he is correct?

wlanford is offline   Reply With Quote
Old 07-20-2016, 11:40 AM   #17
2 Rivet Member
2012 25' FB Flying Cloud
Lexington , Kentucky
Join Date: Oct 2002
Posts: 92
Images: 2
One more thought. Does anyone know if Airsteam will install #6 or #4 wire in place of the #10 to the batteries during construction of a new trailer if paid to do so?
wlanford is offline   Reply With Quote
Old 07-20-2016, 01:39 PM   #18
3 Rivet Member
beetlebob's Avatar
2015 30' Classic
Green Cove Springs , Florida
Join Date: Jan 2013
Posts: 247
Images: 10
Airstream doesn't do anything from their build at the factory. I have the factory installed solar and have found it works good for me. I also have 150 watts of portable panels. We always look for shade so having the panels on the roof is somewhat not good. I am looking into a small wind generator and maybe another set of portable panels but only have 2 AGM 12 volt batteries in the trailer so can only use so much at night anyway Boondocking is our way on the road and we know that so if you learn how to conserve and think you don't need a lot of solar to survive
beetlebob is offline   Reply With Quote
Old 07-20-2016, 04:37 PM   #19
2 Rivet Member
Lets travel's Avatar
2014 30' Classic
Fayetteville , North Carolina
Join Date: Jan 2014
Posts: 34
Thanks for the info, I read your post and was confused because before starting the post I called both Airstream and Zamp. I talked to Jeff at Zamp in technical services and he was very helpful and provided a wealth of information. He stated as far as he knows no one has contacted them from Airstream for advice on the solar package that airstream has put together. Jeff explained to me that 10 Gage wire is NOT what they recommend for solar installs if you have the ability to add more solar panels to the system. No one knows what the Airstream Engineer is talking about 10 Gage wire being able to handle the amps that the 3 port can be connected to. If you buy 3 160 watt solar panel you'll have 480 watts thats about 27 amps, 10 gage is only rated for about 30 amps you would have a very high resistance with this set up. I'm sure many who view this know alot more than I do about solar install but I'm learning quickly with all your advice and help but one thing I do know Airstream is not doing it right.

Lets travel 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
2017 Classic owners BetterNowlinLater 2011 - 2015 Classic (all lengths) 44 Yesterday 11:37 PM
NorCal : 2017 Olema Spring Rally April 7-9, 2017 (formerly at Casini) HootMon-Frau Forum Rallies & Meet Ups 6 09-11-2016 08:05 AM
2017 Classic Question (Batteries and Solar Controller) AIRHEDS 2011 - 2015 Classic (all lengths) 4 07-17-2016 08:31 PM
2017 Classic @ Colonial HeavyAssault 2011 - 2015 Classic (all lengths) 46 06-22-2016 10:50 AM
2017 Classic Upgrades Packerman Airstream Trailer Forums 2 05-29-2016 10:39 PM

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 12:40 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.