need a way to recharge battery while sailing - Page 2 - SailNet Community
Reply
 
LinkBack Thread Tools
post #11 of 16 Old 08-24-2011
Junior Member
 
Join Date: Mar 2011
Posts: 29
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
I have a similar situation....

Is it Ok to leave the solar charger connected directly to the battery while using electronics?

I have read in several places where they say to disconnect panel while using battery.

Thanks
follysurf is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 16 Old 08-24-2011
░░░░░░░░░░
 
Join Date: Apr 2006
Posts: 12,071
Thanks: 6
Thanked 160 Times in 157 Posts
Rep Power: 12
   
folly, in theory the battery will swamp out (absorb) any excess voltage from the panel unless your battery is fully charged, the panels are really huge, the sun bright, and the load small.

In practice a panel may put out 17-22V when it is rated "12" volts and there's a lot of electronics that will blow out at 15 volts, so if you're on a budget you disconnect the panels. Or, use a multimeter and make sure you can't blow anything, i.e. that under the "best" worse case, you never see more than 14.4 volts on the "12" volt supply lines to the electronics.
hellosailor is offline  
Quote Quick Reply Share with Facebook
post #13 of 16 Old 09-05-2011
Senior Member
 
Join Date: Jun 2008
Location: Brier Washington USA
Posts: 156
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
 
You have many options presented here. LED's are expensive. A bigger battery is probably a good choice regardless of what else you run. AGM batteries have a longer/better reserve rating. Outboards....Several problems here; Your basic 9+ hp outboard "may" charge the battery, but will move a J24 at hull speed at idle, and at idle, will not put out enough to charge the battery and could wiegh upwards of 90lbs. and also require a seperate fuel tank, and the storage for it. Most J24 owners that I know don't want the weight aft, so they remove the motor for racing, and I garantee you will not want to lift a 9+hp motor on and off the back of your boat. I run a 4hp with charging circuit(6 amps), with an on-board tank, and it does charge the battery because you do rev it enough for full output, it wieghs 55lbs. Still not light, but I need the motor to get the boat out and in to the morrage.
My choice for you : bigger battery with solar for back-up.
Best of luck
Kary
S/V Mariah
#49080
75R20 is offline  
Quote Quick Reply Share with Facebook
post #14 of 16 Old 09-20-2011
Owner 4knot sb.
 
SHNOOL's Avatar
 
Join Date: Jun 2007
Location: East Stroudsburg, PA
Posts: 1,968
Thanks: 11
Thanked 107 Times in 102 Posts
Rep Power: 9
 
I am curious what you go with... I have a Capri 22, and as I understand it, the small solar (5w) is enough to top off the battery, but that is about it.

I have a 6HP with alternator, and I know it would not charge the battery when it was dead flat (daughter likes to see lights on in the cabin apparently during the day)... Anyway, was just thinking of how/where to mount the tiny solar panel (stern rail obviously, but then when/how)?

I really don't run the motor enough to charge anything.

Yes I like the idea of LED's everywhere, so I'll be looking into that for one of my MANY winter projects.
SHNOOL is offline  
Quote Quick Reply Share with Facebook
post #15 of 16 Old 09-23-2011
Sundance 23
 
carl762's Avatar
 
Join Date: Jan 2010
Location: Portland Oregon
Posts: 878
Thanks: 2
Thanked 5 Times in 5 Posts
Rep Power: 7
 
Quote:
Anyway, was just thinking of how/where to mount the tiny solar panel (stern rail obviously, but then when/how)?
I mounted my Harbor Freight 5 watt panel on the stern rail (zip ties for now) and ran the cabling through starboard Dorade vent back to the battery. I'll fashion a better mounting solution this Winter, but it works just fine for now.

I changed out all the bulbs on the boat with LEDs, and have LED running lights. All that's left is replacing the masthead light with an LED version.

There's no shore power at my current marina, and I've had no problems with power.

Water is Life
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
carl762 is offline  
Quote Quick Reply Share with Facebook
post #16 of 16 Old 09-23-2011
░░░░░░░░░░
 
Join Date: Apr 2006
Posts: 12,071
Thanks: 6
Thanked 160 Times in 157 Posts
Rep Power: 12
   
carl-
As the HF manual for that product says:
"7. This product is not water-proof, so keep out of the rain."

It is intended to be kept on the dashboard of a car, not water-resistant at all. You might want to try adding some silicone seal to improve your odds.
hellosailor is offline  
Quote Quick Reply Share with Facebook
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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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



Similar Threads
Thread Thread Starter Forum Replies Last Post
Battery Chargers for Multiple Battery Banks btrayfors Electrical Systems 5 11-15-2009 11:57 AM
New Battery charger (unplugged) causes spark on battery post!! Northeaster Gear & Maintenance 15 11-17-2008 08:30 PM
Electrical supply and recharge for barebones boat. zz4gta Gear & Maintenance 13 01-03-2008 05:21 PM
Sizing a Battery Charger for Windlass Battery btrayfors Gear & Maintenance 9 04-11-2007 12:43 AM
Battery Recharge System OregonBob Gear & Maintenance 1 04-17-2005 09:24 PM

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