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  #1  
Old 07-31-2018, 05:48 PM
smithflys23 smithflys23 is offline
 
Join Date: Feb 2017
Location: Jupiter
Posts: 58
Default RV8 BatteryMinder

I did a search, and saw one thread that referenced a firewall mounted battery. That is not applicable to my situation.

Iím curious to read what you guys have come up with for a battery charging soulution. My battery is mounted behind the rear baggage area, and is enclosed. Meaning, I have not have fabricated a trap door to access it without doing a lot of unscrewing. Any help,is appreciated!
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  #2  
Old 07-31-2018, 06:22 PM
Carl Froehlich's Avatar
Carl Froehlich Carl Froehlich is offline
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 1,530
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Many ways to do this. Simplest is a standard power jack mounted on the baggage compartment shelf, panel or other convenient spot with a 10 amp breaker wired to the battery(s) or master solenoid(s).

That said, try to never use it. I talked to an RV-14 builder today who just distroyed his third PC-680 battery in two years by using a battery minder. An Odyssey battery retains 90% of its charge sitting idle, so the 1960 concept of trickle charge makes no sense.

My rules for airplane batteries:
- Never charge a battery unless there is a specific reason.
- Never leave a battery charger on a battery unattended. Keep a volt meter on the battery during the charge and remove when terminal voltage gets to 14.3 or so.
- If you run a battery flat, replace it - period. You have damaged it and now do not know what reserve capacity it can provide. Us it in law tractor or such.
- Never run a panel on a battery with a battery charger connected. There are very nice 30 amp power supplies at less than $100 to do this. I have a jumper behind the panel to connect the power supply when I want to run the panel for extended periods of time on the ground. This can also charge the battery just like the alternator if desired.

Carl
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  #3  
Old 07-31-2018, 06:47 PM
Champ's Avatar
Champ Champ is offline
 
Join Date: Apr 2012
Location: Kingsville, Ontario, Canada
Posts: 211
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+1 on Carl's points. I did put in a trap door for easier access to battery, strobe power pack and ELT. Also ran the Odyssey charge cable thru a grommeted hole for quick plug in if I ever need it.

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Kingsville, ON
Bellanca Champ 7ACA since 1986, restored 1990.
RV-8 IO375, Hartzell CS, dual PMags.
Dues paid thru Dec 22, 2018
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  #4  
Old 07-31-2018, 06:50 PM
Mike S's Avatar
Mike S Mike S is offline
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 14,173
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The batteries in my 10 were behind the baggage bulkhead, I ran a pigtail from each one through the bulkhead with a split rubber grommet to protect the wire.

Bit of velcro to hold the pigtail end up and out of the way finished it off.

I totally support the prior comment about not charging the battery without need.



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Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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  #5  
Old 08-01-2018, 10:19 AM
smithflys23 smithflys23 is offline
 
Join Date: Feb 2017
Location: Jupiter
Posts: 58
Default

Quote:
Originally Posted by Champ View Post
+1 on Carl's points. I did put in a trap door for easier access to battery, strobe power pack and ELT. Also ran the Odyssey charge cable thru a grommeted hole for quick plug in if I ever need it.

The trap door is great, I just wish Iíd have known about it sooner.
Thanks!
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  #6  
Old 08-01-2018, 10:21 AM
smithflys23 smithflys23 is offline
 
Join Date: Feb 2017
Location: Jupiter
Posts: 58
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Quote:
Originally Posted by Carl Froehlich View Post
Many ways to do this. Simplest is a standard power jack mounted on the baggage compartment shelf, panel or other convenient spot with a 10 amp breaker wired to the battery(s) or master solenoid(s).

That said, try to never use it. I talked to an RV-14 builder today who just distroyed his third PC-680 battery in two years by using a battery minder. An Odyssey battery retains 90% of its charge sitting idle, so the 1960 concept of trickle charge makes no sense.

My rules for airplane batteries:
- Never charge a battery unless there is a specific reason.
- Never leave a battery charger on a battery unattended. Keep a volt meter on the battery during the charge and remove when terminal voltage gets to 14.3 or so.
- If you run a battery flat, replace it - period. You have damaged it and now do not know what reserve capacity it can provide. Us it in law tractor or such.
- Never run a panel on a battery with a battery charger connected. There are very nice 30 amp power supplies at less than $100 to do this. I have a jumper behind the panel to connect the power supply when I want to run the panel for extended periods of time on the ground. This can also charge the battery just like the alternator if desired.

Carl
My understanding of BatteryMinder, is that it prevents sulfinate? Isnít that what ruins a battery?
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  #7  
Old 08-01-2018, 10:23 AM
smithflys23 smithflys23 is offline
 
Join Date: Feb 2017
Location: Jupiter
Posts: 58
Default

Quote:
Originally Posted by Mike S View Post
The batteries in my 10 were behind the baggage bulkhead, I ran a pigtail from each one through the bulkhead with a split rubber grommet to protect the wire.

Bit of velcro to hold the pigtail end up and out of the way finished it off.

I totally support the prior comment about not charging the battery without need.



Thatís a good idea! Does the BatteryMinder come with the pigtail, or is that something you buy separately?
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  #8  
Old 08-01-2018, 11:03 AM
Mike S's Avatar
Mike S Mike S is offline
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 14,173
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Came with them.
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Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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  #9  
Old 08-01-2018, 11:06 AM
Sam Buchanan's Avatar
Sam Buchanan Sam Buchanan is offline
been here awhile
 
Join Date: Dec 2004
Location: North Alabama
Posts: 3,751
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Quote:
Originally Posted by smithflys23 View Post
My understanding of BatteryMinder, is that it prevents sulfinate? Isnít that what ruins a battery?
Take to heart the advice to not use a trickle charger with the PC-680. Regardless of whatever chemistry is in play, there is solid field history of AGM batteries dying early due to trickle charging. Fly the plane regularly, leave the charger in the toolbox and you should get excellent service for many years.
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Sam Buchanan
1999 RV-6
1918 Fokker D.VII replica
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  #10  
Old 08-02-2018, 07:04 AM
bacstabber's Avatar
bacstabber bacstabber is offline
 
Join Date: Jan 2005
Location: Pensacola, FL
Posts: 95
Default My battery charging solution

Because Iím electrically dependent on my aircraft with my alternative engine installation, I need to ensure that both my batteries are always charged. Therefore, I invested in a BatteryMinder charger, specifically for the odyssey batteries, that is capable of charging more than one battery at a time.

http://www.batteryminders.com/batter...er-desulfator/

I installed two cigarette lighter outlets on the belly of my aircraft near the battery. This is very convenient for plugging the charger into the aircraft. But it has an added bonus. When Iím camping, I can plug my portable electronic devices into the aircraft outlets for charging. Here is my builder log photos of the installation.

http://www.mykitlog.com/users/displa...=148109&row=15
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Jack Clark
Pensacola, FL
RV-8A, Flying
N988RV
VAF Dues Paid for 2018
http://www.mykitlog.com/jackclark/
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