Sailnet - critique my solar project. - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems
 Not a Member? 
  #1  
Old 09-02-2012
night0wl's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Fort Lauderdale
Posts: 1,392
Thanks: 0
Thanked 14 Times in 14 Posts
Rep Power: 9
night0wl is on a distinguished road
Sailnet - critique my solar project.

Hi All,

Can people provide a critique of my wiring diagram here for my solar panel project.

__________________
S/V Jendai
Beneteau 343
Reply With Quote Share with Facebook
  #2  
Old 09-02-2012
night0wl's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Fort Lauderdale
Posts: 1,392
Thanks: 0
Thanked 14 Times in 14 Posts
Rep Power: 9
night0wl is on a distinguished road
Re: Sailnet - critique my solar project.

Those big arrow things are my best representation fo beneteau's proprietary system for battery bank selection. In real life, they look like this:

__________________
S/V Jendai
Beneteau 343
Reply With Quote Share with Facebook
  #3  
Old 09-03-2012
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,380
Thanks: 1
Thanked 72 Times in 70 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: Sailnet - critique my solar project.

Why use a breaker in between the charge controller and the panel?
Reply With Quote Share with Facebook
  #4  
Old 09-03-2012
night0wl's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Fort Lauderdale
Posts: 1,392
Thanks: 0
Thanked 14 Times in 14 Posts
Rep Power: 9
night0wl is on a distinguished road
Re: Sailnet - critique my solar project.

Quote:
Originally Posted by hellosailor View Post
Why use a breaker in between the charge controller and the panel?
I've thought about eliminating it. Its there to prevent a massive amount of current going into the batteries and frying the battery switch. I dunno, how are most people wiring their solar?
__________________
S/V Jendai
Beneteau 343
Reply With Quote Share with Facebook
  #5  
Old 09-03-2012
tommays's Avatar
Senior Member
 
Join Date: Sep 2008
Posts: 4,221
Thanks: 1
Thanked 24 Times in 24 Posts
Rep Power: 6
tommays will become famous soon enough
Re: Sailnet - critique my solar project.

My solar goes right to the house bank with the right size FUSE to protect that section of wire the solar control should not be able to damage the battery's

The alternator output goes to the same-place and they behave together just fine


The Bluesea ACR gives the extra to the cranking battery

The Bluesea 5191 Terminal Fuse Blocks keep the battery's and the boat safe
__________________
1970 Cal 29 Sea Fever

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1981 J24 Tangent 2930
Tommays
Northport NY


If a dirty bottom slows you down what do you think it does to your boat
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by tommays; 09-03-2012 at 07:26 PM.
Reply With Quote Share with Facebook
  #6  
Old 09-03-2012
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 6,981
Thanks: 0
Thanked 61 Times in 52 Posts
Rep Power: 7
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: Sailnet - critique my solar project.

Breakers or fuses are there to protect the wire in a short circuit situation. There should be a breaker or fuse in the positive wire between the controller and the battery, close to the battery post. There is no need for a breaker or fuse between the panel and the controller.
The threat in a short circuit is from the batteries, not the panel.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Share with Facebook
  #7  
Old 09-03-2012
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,380
Thanks: 1
Thanked 72 Times in 70 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: Sailnet - critique my solar project.

As mitiempo says.

"Its there to prevent a massive amount of current going into the batteries "

Where's that massive current going to come from? Can't come from anyplace besides the batteries, the output from the panels is self-limiting and if they short out, power can't get to the batteries from them anyway. Same same battery primary fuse that is there to isolate the batteries from eveyrthing else, should be upstream of the solar connections as well.
Reply With Quote Share with Facebook
  #8  
Old 09-05-2012
night0wl's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Fort Lauderdale
Posts: 1,392
Thanks: 0
Thanked 14 Times in 14 Posts
Rep Power: 9
night0wl is on a distinguished road
Re: Sailnet - critique my solar project.

Ok, so remove the second breaker and go with fuses? Is that the general consensus? What about size of fuses? I'm thinking 10 amp inline?
__________________
S/V Jendai
Beneteau 343
Reply With Quote Share with Facebook
  #9  
Old 09-05-2012
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 6,981
Thanks: 0
Thanked 61 Times in 52 Posts
Rep Power: 7
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: Sailnet - critique my solar project.

I would use fuses. As I said I don't believe they are necessary between the panel and the controller. You want the fuse to be sized larger than the expected maximum current but below the wire's ampacity. You are probably using 10 awg or larger wiring for minimal loss. 10 awg has an ampacity of 51 amps in engine spaces and 60 outside engine spaces. As long as the fuse is a bit larger than the max current you're good to go.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Share with Facebook
  #10  
Old 09-05-2012
night0wl's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Fort Lauderdale
Posts: 1,392
Thanks: 0
Thanked 14 Times in 14 Posts
Rep Power: 9
night0wl is on a distinguished road
Re: Sailnet - critique my solar project.

Yes, using 10 AWG wire. The panel is rated at 215 watts at 26 volts. Peak amperage would be 8 amps at that point. So a 10 amp fuse the right thing to use?

Also the reason I wanted a breaker was to be able to control the panels output for diagnosing things downstream. Is that reason enough or stick with the fuse?
__________________
S/V Jendai
Beneteau 343
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Solar deck instead of solar panels ulferlingsson Gear & Maintenance 34 01-31-2013 05:03 AM
Please critique my charging schematic sfbaysailing Gear & Maintenance 29 05-01-2012 01:43 AM
Anyone bought solar panels from Sun Solar? justonemoreproject Electrical Systems 1 04-18-2012 05:08 PM
Critique this mooring setup! dvuyxx Gear & Maintenance 12 04-26-2010 08:04 PM
New wiring diagram- please critique! funjohnson Electrical Systems 33 03-23-2010 06:45 PM


All times are GMT -4. The time now is 10:30 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012