Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-13-2015, 12:06 PM   #1
Senior Member
 
On The Rocks's Avatar
 
City: Palm Springs CA
Vessel Name: On The Rocks
Vessel Model: Gulf Star MKII
Join Date: Apr 2012
Posts: 109
Solar Controller/ Wire Size Suggestions

I have two Sunpower 327 watt panels that I plan to put on the fly bridge hard top wired parallel. I want to use an MPPT controller mounted about three feet from my 12 volt house bank. The wire run from the panels to the controller is 35 to 40 feet.

Any suggestions on brand/size of controller?

Suggested wire size from panels to controller?

Suggested wire size from controller to batteries?

Click image for larger version

Name:	ImageUploadedByTrawler Forum1442163993.793345.jpg
Views:	59
Size:	51.0 KB
ID:	44460
On The Rocks is offline   Reply With Quote
Old 09-13-2015, 01:27 PM   #2
Valued Technical Contributor
 
DavidM's Avatar
 
City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,786
To spec a controller you need the Voc value above and the output current. In your case the output current would be (2x327)/12 = 55 amps. So you need a controller with a Voc of 65 or greater and an output current of 55 amps or greater.

Since your panels are very high voltage- 65 Voc, they will require a high end controller. Most controllers are only good for 40 V. The Outback Flexmax 60 should work. Other possibilities are made by Blue Sky and Magnum Energy.

Use the Impx2 to size the wire from the panels to the controller. To keep the voltage drop below 3% you will need 6 gauge wire from the panels to the controller and the same from your controller to the batteries.

David
DavidM is offline   Reply With Quote
Old 09-13-2015, 05:16 PM   #3
Senior Member
 
On The Rocks's Avatar
 
City: Palm Springs CA
Vessel Name: On The Rocks
Vessel Model: Gulf Star MKII
Join Date: Apr 2012
Posts: 109
Thanks for the help
On The Rocks is offline   Reply With Quote
Reply

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


» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 05:16 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012