Notices
Marine Electronics Forum

Battery Switching - Do you?

Old 10-06-2006, 09:24 AM
  #1  
Senior Member
Thread Starter
 
Join Date: Sep 2006
Location: Naples, FL
Posts: 221
Likes: 0
Received 0 Likes on 0 Posts
Default Battery Switching - Do you?

I have a CC with 2 batteries and a Perko switch. I have been told to start with Battery 1 , run on Battery 2..............Does anyone do this? If so, wouldn't it make sense to run on ALL position to re-charge both batteries instead of only one?

What is the right way?
Old 10-06-2006, 09:37 AM
  #2  
Senior MemberCaptains Club Member
PLEDGER
 
HOTSPOT's Avatar
 
Join Date: Aug 2003
Location: Bradenton, FL
Posts: 13,397
Likes: 0
Received 10 Likes on 7 Posts
Default Re: Battery Switching - Do you?

When I had that setup, I would run half the day on batt 1 and half the day on batt 2, or alternate each time I went out. The only time I would use both, is if the batt that was selected would not start the engine.

The trend these days is to have a dedicated engine battery and a dedicated deep cycle house battery.

When setup properly, the engine will charge both batteries when running, and you have the ability to combine both batteries if need be.

Some engines have a built in isolator that provides a separate charge lead for a house batt. What engine do you have?

There are TONS of threads on the topic.
Old 10-06-2006, 09:40 AM
  #3  
Senior Member
Thread Starter
 
Join Date: Sep 2006
Location: Naples, FL
Posts: 221
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Battery Switching - Do you?

Engine is a 1996 YAM 225 Carb'd. What does deep cycle mean?
Old 10-06-2006, 09:43 AM
  #4  
Senior MemberCaptains Club Member
 
Join Date: Sep 2002
Location: On the wild side !!
Posts: 5,711
Received 52 Likes on 31 Posts
Default RE: Battery Switching - Do you?

Good info about batteries.


http://www.windsun.com/Batteries/Bat...%20electrolyte
Old 10-06-2006, 09:44 AM
  #5  
Senior MemberCaptains Club Member
 
Join Date: Jan 2006
Location: Wilmington, NC
Posts: 614
Likes: 0
Received 10 Likes on 9 Posts
Default Re: Battery Switching - Do you?

You should not move the switch with the engine running. Don't ask me how I know.
Old 10-06-2006, 11:00 AM
  #6  
Senior MemberCaptains Club Member
 
Join Date: May 2005
Location: South Florida
Posts: 9,744
Received 694 Likes on 390 Posts
Default RE: Battery Switching - Do you?

splitshot-bk - 10/6/2006 9:24 AM

I have a CC with 2 batteries and a Perko switch. I have been told to start with Battery 1 , run on Battery 2..............Does anyone do this? If so, wouldn't it make sense to run on ALL position to re-charge both batteries instead of only one?

What is the right way?
If your engine only has one charging circuit, I would think you would be ok running "ALL" all the time, depending on your other power usage. The advice on switching is likely for redundancy - IE if you are out fishing at night on ALL and your lights, electronics, etc, drain the batts, you won't have a way to start up and get home. However only you would know if this is a likely scenario for your usage. Do you sit for extended periods of time without the engine running? Have a lot of electronics or other power drains?

If your engine has two seperate charging circuits, you are running the correct way, although you should alternate from time to time. (IE start on 2 run on 1)

The times when you are REALLY supposed to avoid "all" is when you have 2 engines, because you don't want both alts trying to change the same battery at the same time.
Old 10-06-2006, 05:14 PM
  #7  
Senior MemberCaptains Club Member
 
Join Date: Jun 2002
Location: Pensacola, Fl.
Posts: 7,371
Likes: 0
Received 6 Likes on 6 Posts
Default Re: Battery Switching - Do you?

JeffSpencer - 10/6/2006 9:44 AM

You should not move the switch with the engine running. Don't ask me how I know.
Sound's like you don't have a "Make Before Break" switch or your swith is worn and defective.

What you said is true a long time ago. The switch's were not MBB and this open's the charge circuit and kill's the charging system.

Today's Master switch's are not that way. My perferance is Blue Sea's switch's.

I run my little Scout like HOTSPOT said.

The problem in running in ALL is, IF a battery goes bad [like shorting a cell] The good battery will discharge into the bad battery trying to equilize it. Then you have 2- dead batteries.
Old 10-07-2006, 11:12 AM
  #8  
Senior MemberCaptains Club Member
 
Join Date: Jun 2006
Location: Beach Haven West, NJ
Posts: 2,023
Likes: 0
Received 8 Likes on 7 Posts
Default RE: Battery Switching - Do you?

I have the same set up. I start on #1 and run out on it. Now #1 is fully charged. I SHUT OFF ENGINE and switch to #2 while fishing or whatever to power electronics and livewell pump. Then I head back in on #2 to fully charge it. When I tie up I have two fully charged batts. I never run on ALL. Don't see any reason to. If for some reason #2 dies while I'm out I know #1 is fully charged to get me back in.
Old 10-07-2006, 11:16 AM
  #9  
Senior MemberCaptains Club Member
 
Join Date: Jul 2005
Posts: 742
Received 90 Likes on 50 Posts
Default Re: Battery Switching - Do you?

Two batts. One cranker, one deep cycle. One isolator. One 1-2-both-off switch. One digital multimeter.

Start on the cranker. Move switch to both or either batt alone depending on current state of charge and batt maintenance. This part is the black art. If your batts are both healthy and the engine started right up...and if you are going to run the engine for a while...just go to both. The total output of the alternator will be split between the two batts. If either batt is in poor condition (digital multimeter prior to start) then run the selector switch in the weaker batteries pos'n.

If you anchor up to fish with the engine off, select the deep cycle batt. A deep clycle batt is designed to be heavily depleted and recharged with no long term damage. A cranker is not....a heavy discharge will sulfate a cranker. On my boat, I'm running a stereo, a livewell pump and a washdown pump at a minimum.

When you start back up to go home, select the cranker and then select the deep cycle for the run home to replace the juice drained at anchor.

The isolater will prevent a weak batt from drawing off of the stronger. It's OK to switch between 1-2-both while the engine is running. It's not OK to switch to OFF while the engine is running unless you have a super dooper switch with the built in diode/gizmo. Most of them don't.

All this is subjective and depends on a mess of factors. You need to know what your boat requires (amp hours) and what it gets it in terms of recharge...how long you run to the grounds....condition of batt terminals....alternator amps...etc etc.

Buy a copy of Nigel Calders book or similar and spend some time in the electrical chapter. Best money you'll spend on your boat next to ice and beer.
Old 10-07-2006, 02:35 PM
  #10  
Senior MemberCaptains Club Member
 
Join Date: Jul 2004
Location: Sarasota, FL
Posts: 2,971
Likes: 0
Received 29 Likes on 19 Posts
Default Re: Battery Switching - Do you?

I start my day with battery #1 then switch to #2 for the run home. I never run with the switch on "both". I replace the batteries at 2.5 - 3 years (earlier if necessary) regardless of condition.
Old 10-07-2006, 09:53 PM
  #11  
Senior Member
 
Join Date: Mar 2006
Location: Daniel Isl. S.C
Posts: 366
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Battery Switching - Do you?

cap. do some homework on this, check cranking amps, deep cycle vs starting, which are wired to what etc. there is no correct answer except if its set up right, you should leave them on both (unless anchored up listening to tunes all night. The main per pose is to prevent leakage and the safety factor. I have seen those things installed horribly. But the new alternators should be more than enough for zero loss. but many variables cap.stray currents and, isolators;its like the big guy picking on the whimp the moast powerfull will eat the lesser one up. so I guess you are doing the right thing, lots of folks crank w/ cranking bat and troll with deep cycle. I put mine on 1 (crank) to crank and both the rest of the day. I have run them 200 days a year like that.
Old 10-09-2006, 01:20 PM
  #12  
Senior MemberCaptains Club Member
 
Join Date: Jan 2006
Location: Wilmington, NC
Posts: 614
Likes: 0
Received 10 Likes on 9 Posts
Default Re: Battery Switching - Do you?

warthog5 - 10/6/2006 5:14 PM

JeffSpencer - 10/6/2006 9:44 AM

You should not move the switch with the engine running. Don't ask me how I know.
Sound's like you don't have a "Make Before Break" switch or your swith is worn and defective.

What you said is true a long time ago. The switch's were not MBB and this open's the charge circuit and kill's the charging system.

Today's Master switch's are not that way. My perferance is Blue Sea's switch's.

I run my little Scout like HOTSPOT said.

The problem in running in ALL is, IF a battery goes bad [like shorting a cell] The good battery will discharge into the bad battery trying to equilize it. Then you have 2- dead batteries.
I guess...This happened on my old 1996 Sunbird with the 2001 Ficht 150. #1 battery wouldn't start the boat, so I started the boat with #2, then switched it back to #1 to try and charge it. Voltage warning was immediate. $800 later and a new computer a lesson was learned.
Old 10-09-2006, 01:48 PM
  #13  
Senior Member
 
Join Date: Jul 2005
Location:
Posts: 131
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Battery Switching - Do you?

Lots of folks here will try to make it real complicated and give you equations and greek formulas as to why you do what.

Lets just keep it simple. Like some said here, run out on 1, and in on 2.

Now lets talk about why. Lets say you are going out on both and the alternator quits charging, and you do not notice the voltmeter (you know, watching for bouys, reading GPS, looking for that good bottom). Now, you are at your favorite honeyhole, and anchor and shut off. 2 hours later, an icebox full of fish, livewell has been running, radio playing, GPS and depthfinder running..... When you try to start...you hear that terrible sound of the starter with only about 6 volts going to it just barely turning the motor over at maybe 5 RPM's.....it ain't gonna start.......

If you had only had one battery in use, the other would still be fully charged and ready. Now this is assuming you are not a total retard and at least did make sure BOTH batteries were fully charged when you left port.

And this is just one scenario. A cable short could easily discharge both batteries quickly also.

Plus. it is easy to remember "Out on 1, In on 2" (Kinda like "Red,Right, Return")

Now I know this does not apply to cruisers and Yachts and so forth, but the guy has a simple center console with 2 batteries....

As for switching while running, most LATER switches have a make before break, but ONLY going from 1 to Both to 2. If you go from 1 to OFF to 2, and engine is running, prepare for a big repair bill......I just always shut off my engine before switching just as a precaution.

Dubble

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 On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.