Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 14-11-2012, 16:27   #1
Registered User
 
Barra's Avatar

Join Date: Sep 2011
Location: Western Australia
Boat: between boats
Posts: 917
Adding Extra Solar Panels

Hi

I currently have 4 x 85 watt panels on my bimini and finding thats not enough to keep everything topped up so am looking to add 2 more panels. Someone told me that if i add extra panels in series then i need to keep to the same watts.... is this correct? He was an electrician but he was a bit short on details so not sure how accurate this is.

ie i would prefer to go a bit higher on the watts but wanted to make sure it wasnt an issue first

thanks
__________________

Barra is offline   Reply With Quote
Old 14-11-2012, 16:52   #2
Registered User
 
Barra's Avatar

Join Date: Sep 2011
Location: Western Australia
Boat: between boats
Posts: 917
Re: Adding Extra Solar Panels

For clarity i was told i should only add more 85 watt units not say 120 or 50 watt panels...

understand that the volts need to be the same
__________________

Barra is offline   Reply With Quote
Old 14-11-2012, 22:57   #3
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Boat: Bestevaer.
Posts: 11,581
Re: Adding Extra Solar Panels

If they are wired in parrallel you can add different wattages without any problems.

If you have a MPPT controller you need to keep the voltages similar. Vmp should be within 0.5v. If you have a none MPPT controller this is less important, but they will all need to be nominal 12v panels with 36 cell, not high voltage panels.

Your controler and wiring may also need to changed.
noelex 77 is offline   Reply With Quote
Old 15-11-2012, 07:03   #4
Registered User

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 18,196
Re: Adding Extra Solar Panels

You can mix Wattages but it is good to stick to panels that deliver similar Voltages.

b.
barnakiel is online now   Reply With Quote
Old 15-11-2012, 14:11   #5
Registered User
 
Barra's Avatar

Join Date: Sep 2011
Location: Western Australia
Boat: between boats
Posts: 917
Re: Adding Extra Solar Panels

Thanks for responses gents. Makes sense. I guess my sparkey mate had volts and wattages mixed up which is a bit of a worry for a licenced electrician!
Barra is offline   Reply With Quote
Old 15-11-2012, 22:09   #6
Registered User
 
Sumner's Avatar

Join Date: Jun 2009
Location: SE Utah
Boat: 1981 Endeavour 37 & 1990 MacGregor 26 Classic
Posts: 371
Re: Adding Extra Solar Panels

Quote:
Originally Posted by Barra View Post
. Someone told me that if i add extra panels in series then i need to keep to the same watts.... is this correct? ..
Before you go any further you had better make sure how the panels are now wire. In series or parallel?

If they are in series the amps should be the same and maybe that is what they were saying as people sometimes interchange amps and watts even though they aren't the same...

http://www.oynot.com/solar-panels.html

Sum
__________________

Sumner is offline   Reply With Quote
Reply

Tags
panels, solar

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 18:05.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.