Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-14-2015, 08:44 PM   #15
Rivet Master
 
AnnArborBob's Avatar
 
2014 27' FB Eddie Bauer
Chelsea , Michigan
Join Date: May 2010
Posts: 1,769
Images: 12
Quote:
Originally Posted by Outdoors4me View Post
"We had to replace the crank up TV antenna with a Jack antenna in between the two AC units to make room for one of the panels."

Bob, how do you like your jack antenna? I like the crank type so much, I need to be convinced to give it up for a solar panel.
We've been living with the Jack antenna since January and it seems to work as well as the crank up one ever did. Plus, there is no "penalty" for forgetting to lower it before moving on. If you want the roof space for an extra solar panel, don't give it a second thought, get the Jack!
__________________

__________________
Bob Martel
WBCCI# 5766
AnnArborBob is offline   Reply With Quote
Old 10-14-2015, 11:56 PM   #16
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,282
You might find this table of interest; taken from Pg. 8 of the Blue Sky Energy 3024iL manual: (slightly mis-aligned, but you get the picture!)

12VDC System 24VDC System
Feet/Meters
12AWG 4.0/1.2 10.7/3.3
10AWG 6.4/2.0 16.9/5.2
8AWG 10.1/3.1 26.9/8.2
6AWG 16.1/4.9 42.8/13.0
4AWG 25.5/7.8 68.1/20.7
2AWG 40.6/12.4 108.2/33.0
1/0AWG 64.6/19.7 172.2/52.5

Pay particular attention to the line in red, which is for the 10AWG that Airstream uses as their solar pre-wire. For a 12VDC parallel connected solar array, you need 6.4' or less to achieve 3% voltage drop. For a 24VDC series/parallel array, you need 16.9' or less for 3% voltage drop or less. Still thinking of using the solar pre-wire????

But of course, some folks don't believe everything they read....especially if it's on the internet!
__________________

__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 10-15-2015, 12:53 PM   #17
Rivet Master
 
2015 30' Classic
Pleasanton , California
Join Date: Jan 2015
Posts: 620
The 100 W Renology panel operate at 18.6 V and 5.3 A. So stacking panels in series and then in parallel to build a 400 W system yields 37.2 V at 10.6 A. If you reuse the pre-wiring, and the length of both conductors is less than 35', then the voltage drop due to the pre-wiring is 70' * (1 ohm/1000 ft) * 10.6 A = 0.742 V. Therefore the loss to the pre-wiring is only 0.742 V / 37.2 V = 2%!

If you're a DIYer, using the pre-wiring to build a 400 W (series/parallel) solar system with a MPPT controller is quite doable. I'm very pleased with my system and the total cost of materials was less than $1500. I selected the Blue Sky 3024 controller with the optional IPN remote. The remote is highly recommended so you can keep track of your battery consumption and make sure you don't deplete your batteries resulting in damage. Not only can you reuse the existing wiring, Airstream provides a pre-installed control cable that you can reuse as well for the IPN remote reducing the installation difficultly.
__________________
Al, K6IV
2015 30' Classic, "Chez Nu"
2014 RAM 2500 w/Cummins Diesel
ProPride Hitch, 400 W Solar
alano is offline   Reply With Quote
Old 10-15-2015, 06:47 PM   #18
BAB
Rivet Master
 
BAB's Avatar

 
2015 30' Classic
2012 28' International
Greensboro , North Carolina
Join Date: Aug 2011
Posts: 1,574
Have used AM Solar twice. First on my '12 28' Intl CCD (400 W install), and recently on my '15 30' Classic (600 W install). A rookie can install with their super instructions and the easy to set-up panels. Really nice to be able to boondock and see batteries at "100%" -- without any 120V plug-ins or running my generator.
__________________
_________________
"SilverLeaf II" 2015 30' Classic
2014 RAM 2500 Laramie 4x4 CC w/6.7L Cummins
ProPride 3P
AIR# 58452
WBCCI # 3430-Unit 21
BAB is offline   Reply With Quote
Old 10-15-2015, 09:03 PM   #19
Full Time Adventurer
 
BoldAdventure's Avatar
 
2007 27' International CCD FB
Nomadic , USA
Join Date: Jul 2013
Posts: 2,743
I was going to piece my system together DIY style with Renology, but research on their panels lead me to believe they are subpar. I chose AMSolar and the GS-135 panels because they are high-efficiency panels that by numbers alone bet the 100 watt Renology panels. It's a shame they stopped making them. I would of added another panel. But plan on adding a 100 watt panel next.

I'm really glad I chose AMSolar, the kit includes everything, no guessing, and no running to the store to get parts/supplies or even wondering if you have everything you need. They provide everything.
__________________
Family of 4 living, working & exploring the USA in our Airstream.
OUR BLOG | FACEBOOK | INSTAGRAM
BoldAdventure is offline   Reply With Quote
Old 10-15-2015, 10:47 PM   #20
Rivet Master
 
2015 30' Classic
Pleasanton , California
Join Date: Jan 2015
Posts: 620
I agree that AM Solar does a heck of a job supporting solar installations for RVs. I bought my solar controller, wiring, combiner box, etc from them. They also provide great support and answered all my questions.

I think you'll find that the GS-135 panels are made by Grape Solar. They are in fact longer than the 100 W Renology panels, and the longer frame accounts for most of the addition power. I was very impressed with the quality of the Renology panels. 400 W costs approximately $569 including shipping!
__________________
Al, K6IV
2015 30' Classic, "Chez Nu"
2014 RAM 2500 w/Cummins Diesel
ProPride Hitch, 400 W Solar
alano is offline   Reply With Quote
Old 10-15-2015, 10:58 PM   #21
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,282
Quote:
Originally Posted by BoldAdventure View Post
I was going to piece my system together DIY style with Renology, but research on their panels lead me to believe they are subpar. I chose AMSolar and the GS-135 panels because they are high-efficiency panels that by numbers alone bet the 100 watt Renology panels. It's a shame they stopped making them. I would of added another panel. But plan on adding a 100 watt panel next.

I'm really glad I chose AMSolar, the kit includes everything, no guessing, and no running to the store to get parts/supplies or even wondering if you have everything you need. They provide everything.

The GS-135 panels were manufactured by Grape Solar (hence the GS designation) as were the GS-100s but were designed by AM Solar, who also sourced the higher efficiency cells that allow for more wattage from less cells (only 32 cells in the GS-100 vs. the standard 36, and 40" length vs. 47").

A 'little bird' told me today that the GS-135s may be coming back from a different source. Don't quote me yet. I will keep you all posted if/when they re-appear.
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 12-15-2015, 02:05 PM   #22
3 Rivet Member
 
2015 28' International
Ofallon , Missouri
Join Date: Sep 2013
Posts: 248
Do you find the 400W enough?

What kind, how many and what size batteries do you have with the 4x100AW panels? Where are they?

I have a 28 ft (exact same length as yours, diff config) and I am considering a solar system. 200W min (current battery stowage will work) or 400W better I think (but need more batteries and I don't want to put them all the way forward on the hitch.
__________________
mpsgolf is offline   Reply With Quote
Old 12-15-2015, 02:39 PM   #23
Rivet Master
 
2015 30' Classic
Pleasanton , California
Join Date: Jan 2015
Posts: 620
I find 400 W suits my needs well. I have the original two group 31 lead-acid cells mounted in the outside box. On cloudy days the batteries are back to 100% by noon. I added the Solar Boost IPN Pro remote so that I can monitor my battery consumption and state-of-charge. I can't imagine installing a solar system without a battery monitor.

I said to myself that I would first use the existing batteries and see if my lifestyle required more battery capacity (AGM or Lithium), but so far this hasn't been the case but of course your mileage may vary.
__________________
Al, K6IV
2015 30' Classic, "Chez Nu"
2014 RAM 2500 w/Cummins Diesel
ProPride Hitch, 400 W Solar
alano is offline   Reply With Quote
Old 02-05-2017, 03:46 PM   #24
Dino & Mike
 
Stream-Style's Avatar
 
Currently Looking...
Northridge , California
Join Date: Sep 2016
Posts: 21
Quote:
Originally Posted by lewster View Post
the 10AWG that Airstream uses as their solar pre-wire. For a 12VDC parallel connected solar array, you need 6.4' or less to achieve 3% voltage drop.
I'm wondering: would you say that on a 16' AS, which I believe (correct me if I'm wrong) only has room for 2 slim panels in the middle of the roof astride the AirCond unit. If the solar controller AS or someone else installs is near the middle of the trailer too, it seems the distance would be fairly close to 6.5'.

I can see over 3% drop would happen quickly on a 20'-34' trailer with 4 to 6 or more panels. But on the 16' bambi, would you say the stock #10 would work for the 2 panels and relatively short distance? Or is #8's the likely way to go?
__________________
"Life a is banquet, and most poor sons-of-bitches are starving to death" ...Auntie Mame
Stream-Style is offline   Reply With Quote
Old 02-05-2017, 04:39 PM   #25
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,282
Quote:
Originally Posted by Stream-Style View Post
I'm wondering: would you say that on a 16' AS, which I believe (correct me if I'm wrong) only has room for 2 slim panels in the middle of the roof astride the AirCond unit. If the solar controller AS or someone else installs is near the middle of the trailer too, it seems the distance would be fairly close to 6.5'.

I can see over 3% drop would happen quickly on a 20'-34' trailer with 4 to 6 or more panels. But on the 16' bambi, would you say the stock #10 would work for the 2 panels and relatively short distance? Or is #8's the likely way to go?
I regularly place a pair of SP-100 panels (21" X 41") on either side of the 16 starting at the front cap. Replacement and relocation of the TV antenna is required. You could definitely get by with the 10AWG if your panels are connected in series using the higher output voltage, but if your panels are connected in parallel I would go 8AWG.

Remember that the solar charge controller should be positioned as close to the batteries as possible, so this usually lengthens the cable run from the roof combiner box to the controller.

Also, if you decide to go with a series connection, be sure that your controller is capable of handling the increased voltages, as it will see up to 40+VDC from a pair of SP-100 panels.

Placing panels on either side of the A/C will effectively negate one of those panels between 30-60% of the day due to shading from the A/C shroud.
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 02-05-2017, 05:47 PM   #26
Dino & Mike
 
Stream-Style's Avatar
 
Currently Looking...
Northridge , California
Join Date: Sep 2016
Posts: 21
Thanks Lew, that makes sense now.

So with 2 panels wired in series, and close to 40volts combined, that would mean the solar controller would have to be an MPPT? (a PWM wouldn't work in this case?)

Do you typically see installs of just 2 panels and a 200 watt system going with MPPT? I don't see THAT much of a cost difference as other websites posters seem to talk about and the AmSolar website did a nice explanation of the MPPT and higher voltage benifits.
__________________
"Life a is banquet, and most poor sons-of-bitches are starving to death" ...Auntie Mame
Stream-Style is offline   Reply With Quote
Old 02-05-2017, 08:24 PM   #27
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,282
Quote:
Originally Posted by Stream-Style View Post
Thanks Lew, that makes sense now.

So with 2 panels wired in series, and close to 40volts combined, that would mean the solar controller would have to be an MPPT? (a PWM wouldn't work in this case?)

Do you typically see installs of just 2 panels and a 200 watt system going with MPPT? I don't see THAT much of a cost difference as other websites posters seem to talk about and the AmSolar website did a nice explanation of the MPPT and higher voltage benifits.
This controller would be perfect for a 200 watt system: http://amsolar.com/victron/cctlr-vt-mpp-10015a

The Victron 100/15 accepts up to 100 VDC input, will easily handle up to 240 watts and automatically senses the battery voltage for proper charge output. In addition, you can get the blue tooth dongle and monitor/program it from your smart phone. Looks like a slam dunk to me................
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 02-06-2017, 01:53 PM   #28
Dino & Mike
 
Stream-Style's Avatar
 
Currently Looking...
Northridge , California
Join Date: Sep 2016
Posts: 21
Quote:
Originally Posted by lewster View Post
Looks like a slam dunk to me................
Me too. Thanks for the Lew!
__________________

__________________
"Life a is banquet, and most poor sons-of-bitches are starving to death" ...Auntie Mame
Stream-Style 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
Adding panels on top of panels instead of replacing? The-Marco Ribs, Skins & Rivets 18 08-02-2014 05:53 PM
Flexible Solar Panels joecolao Generators & Solar Power 42 04-02-2009 01:14 AM
1st Big Modification [SOLAR PANELS] Killo1 Generators & Solar Power 2 06-08-2006 02:51 PM
Solar Panels or Generator? Ron C Generators & Solar Power 7 07-11-2005 12:19 PM
Solar Panels VONZIPPER Generators & Solar Power 7 03-18-2002 08:47 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:29 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

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