Morningstar controller showing 15.3v? - SailNet Community
 
LinkBack Thread Tools
post #1 of 10 Old 3 Weeks Ago Thread Starter
Senior Member
 
Guyfromthenorth's Avatar
 
Join Date: Jul 2015
Location: Northshore of Huron
Posts: 565
Thanks: 323
Thanked 17 Times in 15 Posts
Rep Power: 5
 
Morningstar controller showing 15.3v?

I just caught my charge controller showing 5a input from solar and batteries (4x grp 27 lead acid deep cycles) at 15.3v. That seems high to me...

I have a shunt style monitor and it confirmed 15.3v. Is my charge controller at the end of its life? It has no shut off switch and I had to disconnect the pos lead from the panel to stop it.
Guyfromthenorth is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 3 Weeks Ago
Senior Member
 
colemj's Avatar
 
Join Date: Jul 2003
Location: On the boat cruising
Posts: 2,904
Thanks: 4
Thanked 118 Times in 112 Posts
Rep Power: 17
 
Re: Morningstar controller showing 15.3v?

Does it have a temperature sensor? If so, is it cold where you are?

15.3V would be normal for a temperature sensed controller on flooded lead batteries at 40-45*F.

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 #3 of 10 Old 3 Weeks Ago Thread Starter
Senior Member
 
Guyfromthenorth's Avatar
 
Join Date: Jul 2015
Location: Northshore of Huron
Posts: 565
Thanks: 323
Thanked 17 Times in 15 Posts
Rep Power: 5
 
Interesting. It IS cold today (35deg). The controller has a temp hookup but nothing connected. 2 of the 4 batteries are near my engine and are showing 66deg F. My other 2 would be colder.
Guyfromthenorth is offline  
 
post #4 of 10 Old 3 Weeks Ago Thread Starter
Senior Member
 
Guyfromthenorth's Avatar
 
Join Date: Jul 2015
Location: Northshore of Huron
Posts: 565
Thanks: 323
Thanked 17 Times in 15 Posts
Rep Power: 5
 
My shunt has a temp probe is where I got the 66deg temp. I've hooked up the panel again and I'm watching where it climbs to.
Guyfromthenorth is offline  
post #5 of 10 Old 3 Weeks Ago
Senior Member
 
Join Date: Nov 2010
Location: Baltimore
Posts: 1,749
Thanks: 132
Thanked 43 Times in 36 Posts
Rep Power: 10
 
Re: Morningstar controller showing 15.3v?

Quote:
Originally Posted by Guyfromthenorth View Post
Interesting. It IS cold today (35deg). The controller has a temp hookup but nothing connected. 2 of the 4 batteries are near my engine and are showing 66deg F. My other 2 would be colder.
Also, my morningstar controller has a 'floating' stage. Every 8 weeks (or something) it increases the voltage to 15.x V (don't know the exact voltage) for 8 hours or so. Perhaps you caught it in this stage?
MastUndSchotbruch is online now  
post #6 of 10 Old 3 Weeks Ago
Member
 
Join Date: Nov 2010
Posts: 98
Thanks: 3
Thanked 6 Times in 6 Posts
Rep Power: 10
 
Re: Morningstar controller showing 15.3v?

Do you have AGM batteries? If so, 15.3 volts is going to make them outgas, and drastically reduce their life. There's no way to stuff the electrolyte genie back in the bottle.

With flooded batteries, you'll just need a large quantity of distilled water to place the boiled-away electrolyte.
patrickbryant is online now  
post #7 of 10 Old 3 Weeks Ago
Senior Member
 
chef2sail's Avatar
 
Join Date: Nov 2007
Location: Maryland
Posts: 10,532
Thanks: 95
Thanked 200 Times in 192 Posts
Rep Power: 13
 
Send a message via AIM to chef2sail
Re: Morningstar controller showing 15.3v?

This does not hold true for Lifeline AGM batteries
They can / should be equalized for long life so they don’t get sulfated. Just like wet cells.

Our last bank (6-6volt) lasted 10 years, so the premium you pay for the batteries Over the long run more than pays for their cost. The caveat is that you take care of battery’s. This includes the charging methods ( alternator, shore power three stage charger, solar, and wind if applicable) being lined up with the bank capacity size. Once functional, maintenence is easier than wet cells.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
___________________________
S/V Haleakala (Hawaiian for" House of the Sun")
C&C 35 MKIII Hull # 76
Parkville, Maryland
(photos by Joe McCary)
Charter member of the Chesapeake Lion posse

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


“Sailing is just the bottom line, like adding up the score in bridge. My real interest is in the tremendous game of life.”- Dennis Conner
chef2sail is online now  
post #8 of 10 Old 3 Weeks Ago
Member
 
Join Date: Nov 2010
Posts: 98
Thanks: 3
Thanked 6 Times in 6 Posts
Rep Power: 10
 
Re: Morningstar controller showing 15.3v?

Quote:
Originally Posted by chef2sail View Post
This does not hold true for Lifeline AGM batteries
They can / should be equalized for long life so they don’t get sulfated. Just like wet cells.

Our last bank (6-6volt) lasted 10 years, so the premium you pay for the batteries Over the long run more than pays for their cost. The caveat is that you take care of battery’s. This includes the charging methods ( alternator, shore power three stage charger, solar, and wind if applicable) being lined up with the bank capacity size. Once functional, maintenence is easier than wet cells.
True. I have two 100 AH Lifelines on board myself. But you shouldn't equalize them once every day. The manual says to equalize: "only when the battery is showing symptoms of capacity loss" caused by being stored in a partial state of charge. Section 5.5: (http://lifelinebatteries.com/wp-cont...cal-Manual.pdf)

They only need to be equalized after they have been abused. My Lifeline bats are now 8.5 years old and I have never needed to equalized them. They still test above 90% capacity.

Which means, so far, they cost me less than $50 per year. "Only rich people can afford cheap batteries."

Last edited by patrickbryant; 3 Weeks Ago at 12:03 PM.
patrickbryant is online now  
post #9 of 10 Old 3 Weeks Ago
Senior Member
 
chef2sail's Avatar
 
Join Date: Nov 2007
Location: Maryland
Posts: 10,532
Thanks: 95
Thanked 200 Times in 192 Posts
Rep Power: 13
 
Send a message via AIM to chef2sail
Re: Morningstar controller showing 15.3v?

I equalize during the 8 months I use Haleakula about every other month.
With my master volt 3 stage charger i throw 15.5 in it for 6 hours.
Good preventative medicine.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
___________________________
S/V Haleakala (Hawaiian for" House of the Sun")
C&C 35 MKIII Hull # 76
Parkville, Maryland
(photos by Joe McCary)
Charter member of the Chesapeake Lion posse

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


“Sailing is just the bottom line, like adding up the score in bridge. My real interest is in the tremendous game of life.”- Dennis Conner
chef2sail is online now  
post #10 of 10 Old 3 Weeks Ago Thread Starter
Senior Member
 
Guyfromthenorth's Avatar
 
Join Date: Jul 2015
Location: Northshore of Huron
Posts: 565
Thanks: 323
Thanked 17 Times in 15 Posts
Rep Power: 5
 
Thanks for all the info. I've struggled with my batteries this whole trip. Currently at a marina plugged into shore power and on the charger. My shunt has been at 94% charged for hours now (14.27v reading). Not sure if they are doing ok or not. Had alot of bad luck with batteries over the years.
Guyfromthenorth is offline  
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: 1 (0 members and 1 guests)
 
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