Once again, solar questions..... - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 14 Old 2 Days Ago Thread Starter
Senior Member
 
RichF28's Avatar
 
Join Date: Jun 2015
Posts: 127
Thanks: 4
Thanked 3 Times in 3 Posts
Rep Power: 5
 
Once again, solar questions.....

Should a solar panel be installed with a cut out switch? Our boat has a simple volt meter on the panel to check battery voltage in each bank. When the battery charger is plugged in it will read the output of the charger, 14.8v. The solar controller is wired direct to the battery also. It seems to me that the voltmeter would be reading the output of the solar controller, not the battery. Is that correct?

Thanks
RichF28 is online now  
Sponsored Links
Advertisement
 
post #2 of 14 Old 2 Days Ago
Senior Member
 
Join Date: Aug 2010
Location: The Bahamas
Posts: 3,906
Thanks: 3
Thanked 142 Times in 140 Posts
Rep Power: 10
 
Re: Once again, solar questions.....

I dont have inline solar controller disconnects
Just the all on/off to the bar
Youre still reading the batts on your system
I can read the controllers input separste from other inputs..if i want to
RegisteredUser is online now  
post #3 of 14 Old 2 Days Ago
Senior Member
 
Join Date: Jan 2017
Posts: 1,197
Thanks: 116
Thanked 48 Times in 47 Posts
Rep Power: 3
 
Re: Once again, solar questions.....

Quote:
Originally Posted by RichF28 View Post
Should a solar panel be installed with a cut out switch?
Up to you, long as you can disconnect without too much trouble, or throw a blanket over them

> Our boat has a simple volt meter on the panel to check battery voltage in each bank. When the battery charger is plugged in it will read the output of the charger, 14.8v. The solar controller is wired direct to the battery also. It seems to me that the voltmeter would be reading the output of the solar controller, not the battery.

The **circuit** voltage while charging is a "compromise" between the lower battery V, the demands of concurrent loads and the higher "striving" of the SC output.

Only when charging is stopped will the battery start to settle to its "at rest" V, unless the circuit gets pulled down lower than that by active loads.

To the extent reading at the bank posts differs from at SC output, you might need to reduce that distance, and/or get fatter wiring.
john61ct is online now  
 
post #4 of 14 Old 2 Days Ago
Master Mariner
 
capta's Avatar
 
Join Date: Jun 2011
Location: somewhere south of civilization
Posts: 7,374
Thanks: 138
Thanked 396 Times in 384 Posts
Rep Power: 9
 
Re: Once again, solar questions.....

As I have a fuse on the input from the controller to the batteries, that is my disconnect point. As I would assume you have the same, you shouldn't need anything else.

"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.
“Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.” ― Kenneth Grahame, The Wind in the Willows

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

facebook.com/svskippingstone
capta is online now  
post #5 of 14 Old 2 Days Ago Thread Starter
Senior Member
 
RichF28's Avatar
 
Join Date: Jun 2015
Posts: 127
Thanks: 4
Thanked 3 Times in 3 Posts
Rep Power: 5
 
Re: Once again, solar questions.....

Thanks for the replies everybody. Just for convenience, I'm going to mount a switch next to the controller. Its good that someone mentioned fuses between the battery and controller, I had overlooked that.
RichF28 is online now  
post #6 of 14 Old 2 Days Ago
Senior Member
 
Join Date: Jan 2017
Posts: 1,197
Thanks: 116
Thanked 48 Times in 47 Posts
Rep Power: 3
 
Re: Once again, solar questions.....

Quote:
Originally Posted by capta View Post
As I have a fuse on the input from the controller to the batteries, that is my disconnect point. As I would assume you have the same, you shouldn't need anything else.
Between the bank and the SC is its output.

Do you mean you have fusing at its input, between the panels and the SC? That's where OP is talking about.
john61ct is online now  
post #7 of 14 Old 2 Days Ago
Senior Member
 
colemj's Avatar
 
Join Date: Jul 2003
Location: On the boat cruising
Posts: 3,019
Thanks: 4
Thanked 119 Times in 113 Posts
Rep Power: 17
 
Re: Once again, solar questions.....

A switch between the panels and controller is convenient. Most controllers shouldn't be cut from the battery while the panels are still providing power, so if you need to work on something, it is convenient to be able to switch off the controller appropriately through shutting down its input before cutting its output.

Other than that, there isn't any wire protection considerations to worry about, because a short won't be a problem on that side of the circuit.

Mark

Dolphin 460 Catamaran "Reach"

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

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
- Previous boat
colemj is offline  
post #8 of 14 Old 2 Days Ago
Senior Member
 
Join Date: Jan 2017
Posts: 1,197
Thanks: 116
Thanked 48 Times in 47 Posts
Rep Power: 3
 
Re: Once again, solar questions.....

Quote:
Originally Posted by colemj View Post
it is convenient to be able to switch off the controller appropriately through shutting down its input before cutting its output.
Just a bit nitpicky, but although panel is the input, the power source for running the SC is the bank.

So it does not get "switched off" until disconnected from the batt, or by an internal switch if available, from your phone or whatever.
john61ct is online now  
post #9 of 14 Old 2 Days Ago
Senior Member
 
colemj's Avatar
 
Join Date: Jul 2003
Location: On the boat cruising
Posts: 3,019
Thanks: 4
Thanked 119 Times in 113 Posts
Rep Power: 17
 
Re: Once again, solar questions.....

Quote:
Originally Posted by john61ct View Post
Just a bit nitpicky, but although panel is the input, the power source for running the SC is the bank.

So it does not get "switched off" until disconnected from the batt, or by an internal switch if available, from your phone or whatever.
Whichever means one needs to disconnect the controller from battery power is the means by which the controller is switched off. This is self-evident, and correct. Removing the input before switching off the controller (by whichever means it needs) is the safest procedure, and a required procedure for some controllers.

I'm trying to help here, John.

Mark

Dolphin 460 Catamaran "Reach"

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

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
- Previous boat
colemj is offline  
post #10 of 14 Old 2 Days Ago
Senior Member
 
Join Date: Jan 2017
Posts: 1,197
Thanks: 116
Thanked 48 Times in 47 Posts
Rep Power: 3
 
Re: Once again, solar questions.....

Yes I just pointed out that is when the SC gets turned off, not from the prior cessation of panel input (including a blanket)

And I did say it was a minor point.
john61ct is online now  
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 2 (1 members and 1 guests)
[email protected]
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome