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Charging Question
#10399630
11/09/14 02:45 PM
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Joined: Mar 2010
Posts: 25,803
T Bird
OP
TFF Guru
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OP
TFF Guru
Joined: Mar 2010
Posts: 25,803 |
If I connect two start batteries in parallel will the outboard charge both simultaneously or is a switch needed.
Okie by birth, Texan by choice. USAF "Thunderbirds" Alumni 1985-1989
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Re: Charging Question
[Re: T Bird]
#10399977
11/09/14 07:34 PM
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Joined: Jan 2005
Posts: 1,896
heybaylor
Extreme Angler
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Extreme Angler
Joined: Jan 2005
Posts: 1,896 |
It will charge both batteries, if they are perfectly matched then the charging voltage will be 1/2 of normal charge to each battery.
heybaylor
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Re: Charging Question
[Re: T Bird]
#10401529
11/10/14 05:07 PM
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Joined: Oct 2008
Posts: 276
OIF3
Angler
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Angler
Joined: Oct 2008
Posts: 276 |
Would think no, think the charging system on the motor is designed for twelve volt not 24.
"If everybody's thinking alike, somebody isn't thinking" George S. Patton
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Re: Charging Question
[Re: T Bird]
#10401531
11/10/14 05:08 PM
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Joined: Oct 2008
Posts: 276
OIF3
Angler
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Angler
Joined: Oct 2008
Posts: 276 |
Would think no, think the charging system on the motor is designed for twelve volt not 24.
"If everybody's thinking alike, somebody isn't thinking" George S. Patton
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Re: Charging Question
[Re: T Bird]
#10401595
11/10/14 05:33 PM
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Joined: Nov 2006
Posts: 2,848
TLW
Extreme Angler
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Extreme Angler
Joined: Nov 2006
Posts: 2,848 |
"parallel".... better off with perko battery switch.
Last edited by TLW; 11/14/14 07:26 PM.
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Re: Charging Question
[Re: T Bird]
#10401698
11/10/14 06:06 PM
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Joined: Oct 2005
Posts: 1,711
Lou r Pitcher
Extreme Angler
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Extreme Angler
Joined: Oct 2005
Posts: 1,711 |
If I connect two start batteries in parallel will the outboard charge both simultaneously or is a switch needed. When you 1st connect two partially of fully discharged batteries in parallel, the less discharged battery will discharge into the more discharged battery....this will have at least some negative effect on battery life. When you connect the motor or charger, both will receive the same applied voltage, but each will accept and receive differing amounts of charge current until they both reach full charge. When the motor is running, it will charge both to its amperage ability which varies with RPM. If you were to use a single bank charger that uses charge lead temperature sensing to compensate and optimize it's charging voltages, this feature and safety benefit will be lost for the jumpered battery not connected to the charging lead. Parallel charging works but is a compromise. Best to avoid repeated parallel charging especially if the batteries are not of the same age, size and condition or not always parallel discharged. A weak unusable battery will be harder to detect. A separate house and cranking battery usually offers several advantages over a two paralleled cranking battery setup. Most better and larger boats throughut the world use a dedicated cranking battery + separate house electronics battery setup. In that case a combine switch is usually included to add the batteries together in a cranking emergency.
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Re: Charging Question
[Re: T Bird]
#10403689
11/11/14 02:41 PM
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Joined: Mar 2010
Posts: 25,803
T Bird
OP
TFF Guru
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OP
TFF Guru
Joined: Mar 2010
Posts: 25,803 |
Thanks all, appreciate the info.
Okie by birth, Texan by choice. USAF "Thunderbirds" Alumni 1985-1989
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Re: Charging Question
[Re: T Bird]
#10404280
11/11/14 07:06 PM
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Joined: Sep 2013
Posts: 614
LarryBud
Pro Angler
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Pro Angler
Joined: Sep 2013
Posts: 614 |
A couple of things. Someone said you voltage will be cut in half. No, you current will be cut if half. Your batteries will charge but not as fast.
Another thing. Most charging units get ruined because people throw an undercharged battery in their boat and expect the system to bring it up. It will but when your battery is low, your charging system is going to supply more current than normal charging. This extra heat is generally what kills a charging system. Best practice is to keep your batteries charged up at home. Much better for your system.
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Re: Charging Question
[Re: LarryBud]
#10407440
11/13/14 12:02 AM
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Joined: Jan 2005
Posts: 1,896
heybaylor
Extreme Angler
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Extreme Angler
Joined: Jan 2005
Posts: 1,896 |
A couple of things. Someone said you voltage will be cut in half. No, you current will be cut if half. Your batteries will charge but not as fast.
Another thing. Most charging units get ruined because people throw an undercharged battery in their boat and expect the system to bring it up. It will but when your battery is low, your charging system is going to supply more current than normal charging. This extra heat is generally what kills a charging system. Best practice is to keep your batteries charged up at home. Much better for your system. Wow, I did make a mistake ...current is correct ...my bad ...back to my doghouse
heybaylor
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Re: Charging Question
[Re: heybaylor]
#10411173
11/14/14 06:08 PM
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Joined: Sep 2013
Posts: 614
LarryBud
Pro Angler
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Pro Angler
Joined: Sep 2013
Posts: 614 |
A couple of things. Someone said you voltage will be cut in half. No, you current will be cut if half. Your batteries will charge but not as fast.
Another thing. Most charging units get ruined because people throw an undercharged battery in their boat and expect the system to bring it up. It will but when your battery is low, your charging system is going to supply more current than normal charging. This extra heat is generally what kills a charging system. Best practice is to keep your batteries charged up at home. Much better for your system. Wow, I did make a mistake ...current is correct ...my bad ...back to my doghouse No worries heybaylor... happens to the best of us.
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Re: Charging Question
[Re: T Bird]
#11050662
08/19/15 01:18 PM
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Joined: Jun 2012
Posts: 8
aporcarello
Green Horn
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Green Horn
Joined: Jun 2012
Posts: 8 |
I have a perko switch on my boat, OFF, 1, ALL and 2, I was wondering if I set the switch to ALL and put a charger on one of the batteries, will both batteries charge? Or do I just leave the switch in the off position and charge the batteries individually? I'm just talking basically a trickle charger.. Thanks
"GOD Bless TX"
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Re: Charging Question
[Re: OIF3]
#11051861
08/19/15 09:34 PM
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Joined: Aug 2011
Posts: 2,957
Bob Landry
Extreme Angler
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Extreme Angler
Joined: Aug 2011
Posts: 2,957 |
Would think no, think the charging system on the motor is designed for twelve volt not 24. Two 12V batteries in parallel is still 12V, not 24V.
2015 Seaark 1872 MV CC Etec-90 Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic 2020 Robalo R200 CC, Yamaha 150
Bitter Gun Owner Bitter Clinger Armed Infidel
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