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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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 Posted: Thu May 14, 2015 12:44 pm Post subject: Odyssey optimal charge voltage |
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Just wondering if anyone has researched what optimal alternator setting should be using the Odyssey 925L battery? Whether it should be different than the old wet cell set point between 13.8 and 14.2.
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Kelly McMullen
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philperry9
Joined: 23 Nov 2011
Posts: 381
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| Posted: Thu May 14, 2015 6:12 pm Post subject: Odyssey optimal charge voltage |
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Based on how my Odyssey branded charger works, I'd guess that the answer is it depends.
If I rub my batteries down to 10-11.5 volts, I will see the charger hit them with nearly 17 over a short period of time. In a matter of minutes I can bring a dead battery to 80% charged.
Then I see it taper off to 13.8 at the tail end of the charge after the battery has already taken the bulk of the charge. Then I see the battery settle in around 13.6-13.7.
So based on my observations of their charger, is say 13.8 is a very safe option.
Phil
Sent from my iPhone
On May 14, 2015, at 3:41 PM, Kelly McMullen <apilot2(at)gmail.com (apilot2(at)gmail.com)> wrote:
[quote]Just wondering if anyone has researched what optimal alternator setting should be using the Odyssey 925L battery? Whether it should be different than the old wet cell set point between 13.8 and 14.2.
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dmaib@me.com
Joined: 25 Apr 2006
Posts: 454
Location: New Smyrna Beach, Florida
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| Posted: Thu May 14, 2015 6:27 pm Post subject: Re: Odyssey optimal charge voltage |
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I have an Odyssey brand charger for my 925. According to the documentation, it initially charges at 14.3-14.7 volts (give or take) until the battery is charged. Then it goes to the trickle charge mode at 13.6-13.8 volts (give or take). It can be left in the trickle charge mode indefinitely, according to the manual.
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David Maib
RV-10 #40559
New Smyrna Beach, FL |
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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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| Posted: Thu May 14, 2015 7:29 pm Post subject: Odyssey optimal charge voltage |
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It is that charge phase that had me thinking that the alternator regulator might need to be set above 14.2.
On Thu, May 14, 2015 at 7:27 PM, dmaib(at)me.com (dmaib(at)me.com) <dmaib(at)me.com (dmaib(at)me.com)> wrote:
[quote]--> RV10-List message posted by: "dmaib(at)me.com (dmaib(at)me.com)" <dmaib(at)me.com (dmaib(at)me.com)>
I have an Odyssey brand charger for my 925. According to the documentation, it initially charges at 14.3-14.7 volts (give or take) until the battery is charged. Then it goes to the trickle charge mode at 13.6-13.8 volts (give or take). It can be left in the trickle charge mode indefinitely, according to the manual.
--------
David Maib
RV-10 #40559
New Smyrna Beach, FL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442122#442122
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carl.froehlich(at)verizon
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| Posted: Fri May 15, 2015 6:23 am Post subject: Odyssey optimal charge voltage |
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I can tell you a stock Plane Power alternator works just fine with Odyssey batteries. At full charge the buss voltage is 14.2 vdc.
I’ve used this set up for over a decade (two Odyssey PC-625 battery system) without any issues. As these batteries maintain 90% of their charge over six months I find no need to ever put a charger on the batteries unless I’m doing extended panel powered up stuff. Even then I put a charger on with a volt meter and monitor to remove the charger once terminal voltage gets to 14.2 or so.  Leaving a standard battery charger on a Odyssey battery is a good way to trash it as battery terminal voltage will rapidly rise above 15vdc once you get pass 14.2vdc. At that point you are generating heat and hydrogen. If you really must put a charger on it then get the Odyssey charger – then consider not using it unless you have good reason.
I change out one battery every two years as a routine maintenance item (so neither battery is more than four years old). The pulled batteries provide another four years or so of service in various tractors here at the airpark. The only battery issue I had was when I left one of the master switches on. While you might be able to beat a flat battery back to life assume the damage will significantly degrade battery amp/hr capacity and replace it.
Carl
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Kelly McMullen
Sent: Thursday, May 14, 2015 11:20 PM
To: rv10-list(at)matronics.com
Subject: Re: Re: Odyssey optimal charge voltage
It is that charge phase that had me thinking that the alternator regulator might need to be set above 14.2.
On Thu, May 14, 2015 at 7:27 PM, dmaib(at)me.com (dmaib(at)me.com) <dmaib(at)me.com (dmaib(at)me.com)> wrote:
--> RV10-List message posted by: "dmaib(at)me.com (dmaib(at)me.com)" <dmaib(at)me.com (dmaib(at)me.com)>
I have an Odyssey brand charger for my 925. According to the documentation, it initially charges at 14.3-14.7 volts (give or take) until the battery is charged. Then it goes to the trickle charge mode at 13.6-13.8 volts (give or take). It can be left in the trickle charge mode indefinitely, according to the manual.
--------
David Maib
RV-10 #40559
New Smyrna Beach, FL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442122#442122
===========
-List" target="_blank">http://www.matronics.com/Navigator?RV10-List
===========
FORUMS -
_blank">http://forums.matronics.com
===========
b Site -
-Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
===========
| Quote: | | http://www.matronics.com/Navigator?RV10-List |
01234567
[quote][b]
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davidsoutpost(at)comcast.
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| Posted: Fri May 15, 2015 7:12 am Post subject: Odyssey optimal charge voltage |
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I concur with Carl here about placing the Odyssey batteries on a charger. I have a PC625 I placed in my wave runner about 15 years ago and its still going strong. I don't even bother charging it up at the beginning of the season. Its always ready to go. I also have them in lawn equipment. Same thing with no issues. My buddy uses PC625's in his Cozy MKIV. He used to keep the Odyssey charger plugged in when the plane was parked. Batteries were toasted in 2 years. I have dual 680's in my -10 and only place a charger on it when doing avionics work in the hanger. As soon as the green "charged" light comes on, it gets disconnected.
David Clifford
N646RV
From: "Carl Froehlich" <carl.froehlich(at)verizon.net>
To: rv10-list(at)matronics.com
Sent: Friday, May 15, 2015 9:17:11 AM
Subject: RE: Re: Odyssey optimal charge voltage
I can tell you a stock Plane Power alternator works just fine with Odyssey batteries. At full charge the buss voltage is 14.2 vdc.
I’ve used this set up for over a decade (two Odyssey PC-625 battery system) without any issues. As these batteries maintain 90% of their charge over six months I find no need to ever put a charger on the batteries unless I’m doing extended panel powered up stuff. Even then I put a charger on with a volt meter and monitor to remove the charger once terminal voltage gets to 14.2 or so. Leaving a standard battery charger on a Odyssey battery is a good way to trash it as battery terminal voltage will rapidly rise above 15vdc once you get pass 14.2vdc. At that point you are generating heat and hydrogen. If you really must put a charger on it then get the Odyssey charger – then consider not using it unless you have good reason.
I change out one battery every two years as a routine maintenance item (so neither battery is more than four years old). The pulled batteries provide another four years or so of service in various tractors here at the airpark. The only battery issue I had was when I left one of the master switches on. While you might be able to beat a flat battery back to life assume the damage will significantly degrade battery amp/hr capacity and replace it.
Carl
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Kelly McMullen
Sent: Thursday, May 14, 2015 11:20 PM
To: rv10-list(at)matronics.com
Subject: Re: Re: Odyssey optimal charge voltage
It is that charge phase that had me thinking that the alternator regulator might need to be set above 14.2.
On Thu, May 14, 2015 at 7:27 PM, dmaib(at)me.com (dmaib(at)me.com) <dmaib(at)me.com (dmaib(at)me.com)> wrote:
--> RV10-List message posted by: "dmaib(at)me.com (dmaib(at)me.com)" <dmaib(at)me.com (dmaib(at)me.com)>
I have an Odyssey brand charger for my 925. According to the documentation, it initially charges at 14.3-14.7 volts (give or take) until the battery is charged. Then it goes to the trickle charge mode at 13.6-13.8 volts (give or take). It can be left in the trickle charge mode indefinitely, according to the manual.
--------
David Maib
RV-10 #40559
New Smyrna Beach, FL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442122#442122
===========
-List" target="_blank">http://www.matronics.com/Navigator?RV10-List
===========
FORUMS -
_blank">http://forums.matronics.com
===========
b Site -
-Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
===========
| Quote: | | http://www.matronics.com/Navigator?RV10-List |
01234567
8
[quote][b]
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bill.peyton
Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO
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| Posted: Fri May 15, 2015 12:11 pm Post subject: Re: Odyssey optimal charge voltage |
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When I spoke with technical support at odyssey, they recommended charging both the 680 and 925 batteries at a nominal voltage of 14.4-14.5 volts. Unfortunately, if you have the plane power alternator, with th internal VR the only way to increase the charging voltage is to add resistance in the field line going to the alternator. The PP alternator uses the field line to sense the charge voltage. What I did was to use a #20 gauge wire to feed the field voltage. More than sufficient to carry the 5 amp load, but small enough diameter to create a slight voltage drop. I charge at 14.5 volts. Almost 3 years and 380 hours, and still going strong. Will 14.2 volts work? Probably
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Bill
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