Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 29-04-2016, 09:04   #16
Registered User

Join Date: Feb 2014
Location: FL
Boat: Catalina, 25 SK
Posts: 17
Re: Leaving boat unattended with solar

I have a 12 Volt, 5 Watt panel that is always connected to the battery bank. The boat is in FL and I leave the boat for a month or so at a time. The batteries are always fully charged when I return. I have a 45 Watt panel I use if I need more power when sailing.
__________________

__________________
Sarge17 is offline   Reply With Quote
Old 29-04-2016, 09:10   #17
Registered User

Join Date: Apr 2015
Location: West Coast FLA
Boat: 1978 Pearson 424 Ketch
Posts: 451
Re: Leaving boat unattended with solar

Batteries loose a 1/4 amp a day to the air. just sitting, even when not hooked to anything. the lower the state of charge the more you'll loose and higher the humidity will cause more loss too. It can get up to 1/2 an amp. So there will always be room for some charge. Make sure you have plenty air room/flow around the heat sink on the charge controller, as when the panels are putting out more than is needed the extra amperage will get dissipated through heat.

on another boat I had with wind and solar I used a load diverter type controller and ran the load to a heating element in a small tank for hot water. I had fairly hot water most of the time, in the southern trades.
__________________

__________________
tinkrman69 is offline   Reply With Quote
Old 29-04-2016, 09:14   #18
Registered User

Join Date: Oct 2011
Location: Sequim, WA
Boat: Pacific Seacraft Dana 24
Posts: 165
Re: Leaving boat unattended with solar

Might want to worry about raccoons sneaking aboard.
__________________
Xthewater is offline   Reply With Quote
Old 29-04-2016, 09:47   #19
Registered User

Join Date: Aug 2009
Location: Switzerland
Boat: Outbound 46 -Callisto
Posts: 149
Re: Leaving boat unattended with solar

We have 350 watts of solar and a 1050 AH AGM house bank. With a Bluesky 3024iL, and with only the bilge pump active, we see several hours a day with voltages well above the battery float voltage. I have often wondered if this is OK, but have chosen to pull the fuse when we are away from the boat. The folks that do caretaking for us put the fuse back in for a day or two periodically to keep the batteries topped up. This seems to work OK.

David
s/v Callisto
__________________
DMCantor is offline   Reply With Quote
Old 30-04-2016, 11:21   #20
Life is good!
 
SV Bacchus's Avatar

Cruisers Forum Supporter

Join Date: Apr 2016
Location: East coast of FL
Boat: Leopard 42 Owner's Ver
Posts: 772
Re: Leaving boat unattended with solar

Quote:
Originally Posted by DMCantor View Post
We have 350 watts of solar and a 1050 AH AGM house bank. With a Bluesky 3024iL, and with only the bilge pump active, we see several hours a day with voltages well above the battery float voltage. I have often wondered if this is OK, but have chosen to pull the fuse when we are away from the boat. The folks that do caretaking for us put the fuse back in for a day or two periodically to keep the batteries topped up. This seems to work OK.

David
s/v Callisto
No expert here, I am gleaning all the info I can. After reading the posts of others I wonder why you pull the fuse? Have you had a bad experience we could all learn from?

Also, humid Florida here, it seems those extra volts could be put to good use running a dehumidifier. Which, depending on where it drains, may run the bilge pump every once in a while.

If you are gone for a month or two, would a dehumidifier generate enough fluid to flood a vessel to the point of damaging your sole flooring in that time period if the bilge pump quit?
__________________

__________________
SV Bacchus - spreading libations world wide, via sailboat, to help the "up tight" relax and enjoy life!
SV Bacchus is offline   Reply With Quote
Reply

Tags
solar

Thread Tools
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Leaving sailboat in Indonesia unattended? asdf777 General Sailing Forum 5 16-08-2015 10:15
Leaving a Boat Unattended for Some Time Navwoman Europe & Mediterranean 25 31-03-2013 03:29
Leaving Your Boat Unattended nhpr General Sailing Forum 13 17-03-2012 02:30
Leaving Boat Unattended Tom1340 General Sailing Forum 32 08-12-2010 21:01
Best arrangements for leaving boat unattended in foreign ports??? Lightfin General Sailing Forum 4 19-02-2008 21:53



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:29.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.