24 Volt Trickle Charger

[Glen Davis]

My new to me 1989 J is 24 volt. There is a wire/connector in the hat shelf area with the standard quick disconnect plug you see on all 12 volt trickle chargers .  I can’t find any 24 volt trickle chargers with that connector.  Does anyone know of a 24 volt trickle charger that uses this connector?  

 

[Boilermonkey]

Battery Minder

[Marc_B]

@OSUAV8TER I think someone needs your help!    Post up what battery you have.  It's a pretty standard connection for trickle chargers...my motorcycle chargers have the same connection.

https://www.batteryminders.com/batteryminder-model-244cec2-aa-s5-24v-4-amp-concorde-aviation-battery-charger-maintainer-desulfator/

 

[Greg Ellis]

@Glen Davis If you choose to buy a battery minder, make sure you get the one specific for your type of battery.  They make specific ones for Concorde as @Marc_B showed in his post and one's for Gill and others.

[Fly Boomer]

+1 for the response from @Boilermonkey

[ZuluZulu]

6 hours ago, Glen Davis said:

My new to me 1989 J is 24 volt. There is a wire/connector in the hat shelf area with the standard quick disconnect plug you see on all 12 volt trickle chargers .  I can’t find any 24 volt trickle chargers with that connector.  Does anyone know of a 24 volt trickle charger that uses this connector?  

 

I have an MSE, which means it has a 28V electrical system like your ‘89, and my Concorde BatteryMinder connectors look exactly like that. 

[EricJ]

Be careful with that kind of connector.   Note that as shown the exposed terminal is connected to the positive terminal, so if it touches something grounded it'll cause a short.   I have some equipment with these that have captive covers that you can slip over the end, but that's still not great because they often fall off or just don't get used.

Usually what's done with the battery minders is that these connectors are used to attach a different type of connector that shields the terminals on each side, like an Anderson plug or similar.   Some airports (like mine) require the use of the "airframe kit" from spruce in order to keep a minder connected in a hangar.    Like this one, that uses Anderson connectors.   I like this kit because it also has the rubber cover for the connector on the aircraft side, to minimize the chance of anything getting in there and shorting the battery.

https://www.aircraftspruce.com/catalog/elpages/audioathaik.php?clickkey=8962

[OSUAV8TER]

@Glen Davis is it a 24V Concorde? I am a BatteryMinder dealer and BatteryMinder has that kind of connector. Here is a link to that particular charger. They are battery specific so if you have a Gill, there is a model for that.

https://www.gallagheraviationllc.com/BatteryMINDer-28V-Concorde-Sealed-Flooded_p_315.html

[larryb]

The thing I don't like about that connector is the PVC insulated wire. That is not considered aviation spec, which would be Tefzel insulated wire. Tefzel is physically much more durable and does not burn like PVC.

 

But the polarity of the connector should not be a problem True, the pic shows the unshielded pin to be red or positive. But that would be the "load" connector. The "supply" connector, which should be the one wired to the battery, will be opposite. It will have the red wire connected to the shielded pin. 

[Boilermonkey]

Here are the 3D printed mounts that I made for our M20M and for a friend's M20J.  The difference being one or two receptacles.