shore power battery charger - 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
 Not a Member? 
  #1  
Old 06-21-2009
Junior Member
 
Join Date: May 2009
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
samhamt is on a distinguished road
shore power battery charger

I just bought a boat and found out that the battery on it is not hooked up to the shore power. How do I hook it up so that the shore power charges the battery?
Reply With Quote Share with Facebook
  #2  
Old 06-21-2009
Vasco's Avatar
Warm Weather Sailor
 
Join Date: Sep 2006
Location: Toronto
Posts: 959
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 8
Vasco is on a distinguished road
If your boat doesn't have a battery charger you will have to buy one and connect it to your AC (shorepower) and the batteries.
__________________
Rick I
Toronto in summer, Bahamas in winter.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #3  
Old 06-21-2009
Vitesse473's Avatar
Wannabe Sailing Bum
 
Join Date: Mar 2008
Location: SF Bay Area
Posts: 142
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
Vitesse473 is on a distinguished road
SamHamT needs to post the battery bank type and size. If it's a small to medium size bank, than I have a Dolphin 40amp charger I'd be happy to offload for very cheap.

Whatever you do, make sure you know what you are doing when connecting all the cables. Using incorrectly sized cables can lead to a fire. Just be knowledgable and thus safe. It's actually a simple project if you research and size it properly.
Reply With Quote Share with Facebook
  #4  
Old 06-21-2009
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
As stated previously, the battery charger size is usually determined by the size and type of battery bank you have. A good brand of reasonably priced chargers are the Iota brand, which have been recommended by several sailnet members, including myself.
__________________
Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #5  
Old 06-21-2009
Aura Columbia 30
 
Join Date: Mar 2009
Posts: 26
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Boondoggle30 is on a distinguished road
Killed my charging system??

So I'm still learning... haven't run into anything but stupidity and experience are tough teachers.

Today was my first 'solo' without anyone along who knows what the %#$% sailing is about (only 2 passengers, one my wife!).

Up to now my 'teacher' has had a series of duties and I have the lion's share (being the student). Well today I forgot to do one of the duties he NORMALLY does FOR ME...

I started the engine and put it to idle... left it running for about 4 minutes and noticed that I was still on shore power.

Yes ouch. I immediately killed the engine, unhooked from shore and carried on. Once we returned (an ugly approach to the slip!) and were back on shore power I switched the batteries to all banks (starter and house) and then selected "test" and the power meter went into the green and 'charge' area. Now without knowing how the boat is wired (because I can't tell you!) did I fry my charging system??!! How can I tell??

I left the shore power plugged in over night and the frig is running. I figure that if the system is N/S then the frig will drain the house batteries and show me the error of my ways.

Suggestions??

If you think experience is good teacher... try stupidity.

Al
Reply With Quote Share with Facebook
  #6  
Old 06-22-2009
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 6,982
Thanks: 0
Thanked 61 Times in 52 Posts
Rep Power: 7
mitiempo will become famous soon enough mitiempo will become famous soon enough
The main thing is to run your engine, and therefore your alternator, with one or the other of your batteries (or both) selected so you don't fry the alternator's diodes. It does no harm to start and run your engine while on shorepower. So the important question is whether or not at least one of your batteries was selected when the engine was running.
Brian
Reply With Quote Share with Facebook
  #7  
Old 06-22-2009
jarcher's Avatar
Senior Member
 
Join Date: Jul 2008
Location: Smithfield, RI
Posts: 986
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
jarcher is on a distinguished road
Quote:
Originally Posted by mitiempo View Post
So the important question is whether or not at least one of your batteries was selected when the engine was running.
Most likely yes, since he was able to start the engine.

To test your charging system, select ALL on your battery selector (if you have one - not all boats do), disconnect the shore power and fire up the engine. Take a volt meter (a cheapie from Radio Shack will do fine) and measure the voltage. Just put the black test lead on either battery negative terminal and the red one on the same battery's positive terminal. Make sure the meter (1) is set to measure DC volts and (2) that you have it on a scale that is more than 14 volts (most have scales that max pout at 10 volts, then another at 50).

You want to see 14 volts DC or slightly more. If you are not sure how to read the meter, note where the needle is and shut the engine down. The needle should move down a bit, to 12 or so volts.

If you see no change in voltage with and without the engine running, you probably have a charging system problem. If you see a very high voltage with the engine running, you probably have a problem, in this case a damaged voltage regulator.

From what you described though I think thr odds are high that you're fine. Of course I don't know how your boat is wired but I am playing the odds.
Reply With Quote Share with Facebook
  #8  
Old 06-22-2009
Aura Columbia 30
 
Join Date: Mar 2009
Posts: 26
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Boondoggle30 is on a distinguished road
Charger issue

Thank you much. At the time I did this, I had the selector set to BOTH for all batteries - not sure if that is better or worse!

Anyway, I will either track down a volt meter or buy one. I am reassured though by your comments. Just another lesson learned I guess.

So the 'bad' part of starting while connected to shore power is what?? if no battery is selected? What is the issue? just for my knowledge.

Thank you again.

Al
Reply With Quote Share with Facebook
  #9  
Old 06-22-2009
jarcher's Avatar
Senior Member
 
Join Date: Jul 2008
Location: Smithfield, RI
Posts: 986
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
jarcher is on a distinguished road
Quote:
Originally Posted by Boondoggle30 View Post
Thank you much. At the time I did this, I had the selector set to BOTH for all batteries - not sure if that is better or worse!

.
.
.

So the 'bad' part of starting while connected to shore power is what?? if no battery is selected? What is the issue? just for my knowledge.
Well if you had the battery selector set to "ALL" and if your boat is wired correctly, then you have nothing to worry about. Your engine has a charging system that generates about 14.5 volts DC to charge your batteries. If it does not have batteries connected to it when it runs then the charging system can be damaged.

Likewise, depending upon the type of selector switch you have, moving it while the engine is running could damage the charging system as well. If it is the type of switch that does a "make before break" then its fine to move it, because as you switch, for example, from "1" to "ALL" or whatever it will connect battery 1 before disconnecting ALL/battery 2. NEVER turn the switch off while the engine is running. If you are not sure, set it to ALL before you start and don't move it until after you shut down.

Regarding shore power, this depends entirely on how the boat is wired, but most likely it is not relevant to this issue. If you have an AC battery charger it will charge the batteries when you plug in, and that's fine. I can't speak for every model of charger, but I have not seen a charger damaged by running the engine while it was turned on.

Most likely the AC charger is not sufficient to start the engine if both batteries are dead. Such chargers do exist but most that you install just charge slowly.

If you do have a dead or defective battery you need to switch away from it to start. So if battery 1 is dead, start with battery 2 alone, assuming battery 2 can start the engine. There are house batteries and starting batteries. You may want to check and see which is which, or if they are the same. If you have one of each, start the engine using the starter battery IF you have a make before break switch you can switch to "ALL" while the engine is running. That way, both batteries get charged by the engine.
Reply With Quote Share with Facebook
  #10  
Old 06-22-2009
jarcher's Avatar
Senior Member
 
Join Date: Jul 2008
Location: Smithfield, RI
Posts: 986
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
jarcher is on a distinguished road
Quote:
Originally Posted by Boondoggle30 View Post
... I switched the batteries to all banks (starter and house) and then selected "test" and the power meter went into the green and 'charge' area.
This is probably a volt meter. If so, you don't need another. Even if it is not marked well, see if the reading with the engine running is higher than the reading without the engine running.
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
Battery question Northbeach Gear & Maintenance 9 01-10-2008 10:55 PM
Another battery charger question Omatako Gear & Maintenance 1 09-13-2007 03:23 AM
Battery Charger zaldog Gear & Maintenance 32 08-07-2007 08:47 PM
Paralleling Batteries dave.verry Gear & Maintenance 79 11-27-2006 11:19 AM
Installing a New Battery Bank Sue & Larry Gear and Maintenance Articles 0 09-26-2002 08:00 PM


All times are GMT -4. The time now is 08:43 AM.

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