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Connect 12V Power Pack to Airplane

 
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art(at)zemon.name
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PostPosted: Sun Jul 28, 2019 5:55 am    Post subject: Connect 12V Power Pack to Airplane Reply with quote

I was at AirVenture this week and spent a lot of time in a chair next to my airplane. I took a door off of the BD-4C and people stopped to ask questions. It was great!
I got the idea of lighting up the EFIS screens. I have a Jackery 167 watt/hour portable power pack. I borrowed a little Black & Decker 2A battery charger/maintainer. I hooked it up to the airplane and powered it from the 110V inverted on the power pack. That was all good and it gave me a few hours of power with the watt meter on the power supply reading around 30 watts.
Running the 110V inverter used 4 watts and a bunch of the battery maintainer's energy was being dissipated as heat.

My power supply also has a 12V DC output which measures 13.3V with no load. Could I have hooked that output to the airplane instead of the battery maintainer, without damaging the battery? 
    -- Art Z.
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https://CheerfulCurmudgeon.com/Love the stranger for you yourselves were strangers in Egypt. Deut. 10:19


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kenryan



Joined: 20 Oct 2009
Posts: 344

PostPosted: Sun Jul 28, 2019 7:34 am    Post subject: Connect 12V Power Pack to Airplane Reply with quote

Art, I cannot answer your question directly, but on my airplane there are a couple of easily accessible places to clip on where I can feed the bus without turning on the master switch, leaving the battery out of the picture completely. Doing that also eliminates the current draw of the battery contactor.

On Sun, Jul 28, 2019 at 6:00 AM Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:

Quote:
I was at AirVenture this week and spent a lot of time in a chair next to my airplane. I took a door off of the BD-4C and people stopped to ask questions. It was great!
I got the idea of lighting up the EFIS screens. I have a Jackery 167 watt/hour portable power pack. I borrowed a little Black & Decker 2A battery charger/maintainer. I hooked it up to the airplane and powered it from the 110V inverted on the power pack. That was all good and it gave me a few hours of power with the watt meter on the power supply reading around 30 watts.
Running the 110V inverter used 4 watts and a bunch of the battery maintainer's energy was being dissipated as heat.

My power supply also has a 12V DC output which measures 13.3V with no load. Could I have hooked that output to the airplane instead of the battery maintainer, without damaging the battery? 
    -- Art Z.
--
https://CheerfulCurmudgeon.com/Love the stranger for you yourselves were strangers in Egypt. Deut. 10:19



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user9253



Joined: 28 Mar 2008
Posts: 1436
Location: Riley TWP Michigan

PostPosted: Sun Jul 28, 2019 10:17 am    Post subject: Re: Connect 12V Power Pack to Airplane Reply with quote

The aircraft battery normally gets charged with over 14 volts. So 13.3 volts are not going to hurt it. The lithium battery will discharge into a lead acid battery connected in parallel. So it is best not to connect the two batteries together. Ken's suggestion is a good one. Connect the lithium battery downstream of the battery contactor, which remains off. According to the Amazon ad, the lithium power supply can output up to 7 amps at 12 volts. So it should handle a 2 or 3 amp, 12 VDC load. Your idea to eliminate the inverter and charger is a good one.

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art(at)zemon.name
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PostPosted: Sun Jul 28, 2019 7:05 pm    Post subject: Connect 12V Power Pack to Airplane Reply with quote

I think that you have hit on the best idea, Ken. I actually have an old fashioned cigarette lighter plug which I planned to install but never got around to installing. That will give me exactly the connect that I require and, coincidentally, my power pack came with exactly the cable that I need.
    -- Art Z.
On Sun, Jul 28, 2019 at 10:51 AM Ken Ryan <keninalaska(at)gmail.com (keninalaska(at)gmail.com)> wrote:

Quote:
Art, I cannot answer your question directly, but on my airplane there are a couple of easily accessible places to clip on where I can feed the bus without turning on the master switch, leaving the battery out of the picture completely. Doing that also eliminates the current draw of the battery contactor.

On Sun, Jul 28, 2019 at 6:00 AM Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:

Quote:
I was at AirVenture this week and spent a lot of time in a chair next to my airplane. I took a door off of the BD-4C and people stopped to ask questions. It was great!
I got the idea of lighting up the EFIS screens. I have a Jackery 167 watt/hour portable power pack. I borrowed a little Black & Decker 2A battery charger/maintainer. I hooked it up to the airplane and powered it from the 110V inverted on the power pack. That was all good and it gave me a few hours of power with the watt meter on the power supply reading around 30 watts.
Running the 110V inverter used 4 watts and a bunch of the battery maintainer's energy was being dissipated as heat.

My power supply also has a 12V DC output which measures 13.3V with no load. Could I have hooked that output to the airplane instead of the battery maintainer, without damaging the battery? 



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https://CheerfulCurmudgeon.com/Love the stranger for you yourselves were strangers in Egypt. Deut. 10:19


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donvansanten(at)gmail.com
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PostPosted: Sun Jul 28, 2019 7:18 pm    Post subject: Connect 12V Power Pack to Airplane Reply with quote

Art, you may want to use a "Powerlett" receptacle and plug. Cigarette lightets are not good at any where above about 3 amps for continuos usage. Burned a few on my RV7. Have han no issues with the Powerlet stuff.

On Sun, Jul 28, 2019, 20:10 Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:

Quote:
I think that you have hit on the best idea, Ken. I actually have an old fashioned cigarette lighter plug which I planned to install but never got around to installing. That will give me exactly the connect that I require and, coincidentally, my power pack came with exactly the cable that I need.
    -- Art Z.
On Sun, Jul 28, 2019 at 10:51 AM Ken Ryan <keninalaska(at)gmail.com (keninalaska(at)gmail.com)> wrote:

Quote:
Art, I cannot answer your question directly, but on my airplane there are a couple of easily accessible places to clip on where I can feed the bus without turning on the master switch, leaving the battery out of the picture completely. Doing that also eliminates the current draw of the battery contactor.

On Sun, Jul 28, 2019 at 6:00 AM Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:

Quote:
I was at AirVenture this week and spent a lot of time in a chair next to my airplane. I took a door off of the BD-4C and people stopped to ask questions. It was great!
I got the idea of lighting up the EFIS screens. I have a Jackery 167 watt/hour portable power pack. I borrowed a little Black & Decker 2A battery charger/maintainer. I hooked it up to the airplane and powered it from the 110V inverted on the power pack. That was all good and it gave me a few hours of power with the watt meter on the power supply reading around 30 watts.
Running the 110V inverter used 4 watts and a bunch of the battery maintainer's energy was being dissipated as heat.

My power supply also has a 12V DC output which measures 13.3V with no load. Could I have hooked that output to the airplane instead of the battery maintainer, without damaging the battery? 



--
https://CheerfulCurmudgeon.com/Love the stranger for you yourselves were strangers in Egypt. Deut. 10:19



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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
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