Today's Message Index:
----------------------
1. 08:34 AM - shore power combined with LiFePO battery (Ken Ryan)
2. 08:58 AM - Re: shore power combined with LiFePO battery (Sebastien)
3. 09:02 AM - Re: shore power combined with LiFePO battery (Rick Beebe)
4. 11:00 AM - Re: shore power combined with LiFePO battery (Robert L. Nuckolls, III)
5. 11:49 AM - Re: shore power combined with LiFePO battery (Ken Ryan)
6. 11:02 PM - Re: Antenna Ground Plane (Demixl)
7. 11:02 PM - Re: The joys of a Z-14 during an charging system failure (Demixl)
Message 1
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| Subject: | shore power combined with LiFePO battery |
I am finishing up my airplane and it is starting to sink in that I really
need to spend some hours sitting in it getting used to the instrumentation
(I have never used glass cockpit before this). So there is a need to sit in
the airplane with shore power connected to keep from running down the
EarthX battery. But I am concerned about using shore power with lithium
battery technology because of their charging sensitivities. What do you
guys think? Would it be okay to connect an adjustable power supply to the
electrical system, with the battery in place? If so, what should I set the
voltage for? The problem is that pulling the battery is a bit of a hassle
and takes about a half hour. Same for installation. It would be better if I
could just plug in.
Thanks,
Ken
Message 2
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| Subject: | Re: shore power combined with LiFePO battery |
If you aren't planning on pulling the battery before going for a flight and
running the alternator, I wouldn't consider pulling the battery before
running a power supply on the ground. Your alternator will likely put out
13.8 - 14.5 V, set your power supply to somewhere in there and find a
convenient place to plug in.
You may want to pull the field breaker, the alternator can pull a few amps
and get quite hot on the ground if the bus voltage is below the regulator
set voltage. My boss once unplugged a power supply from the wall while
still plugged in to the aircraft with the battery master on, smoked a wire
but the power supply is ok. We now have a 10A breaker in the power supply
wires just in case he does it again or there is a power failure or
something.
On Wed, Jun 26, 2019 at 8:38 AM Ken Ryan <keninalaska@gmail.com> wrote:
> I am finishing up my airplane and it is starting to sink in that I really
> need to spend some hours sitting in it getting used to the instrumentation
> (I have never used glass cockpit before this). So there is a need to sit in
> the airplane with shore power connected to keep from running down the
> EarthX battery. But I am concerned about using shore power with lithium
> battery technology because of their charging sensitivities. What do you
> guys think? Would it be okay to connect an adjustable power supply to the
> electrical system, with the battery in place? If so, what should I set the
> voltage for? The problem is that pulling the battery is a bit of a hassle
> and takes about a half hour. Same for installation. It would be better if I
> could just plug in.
>
> Thanks,
>
> Ken
>
>
Message 3
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| Subject: | Re: shore power combined with LiFePO battery |
I would set it to whatever you expect out of your alternator. 13.8v
say. The EarthX will protect itself from being overcharged. You just
want the voltage high enough that you're not drawing from the battery.
--Rick
On 6/26/2019 11:32 AM, Ken Ryan wrote:
> I am finishing up my airplane and it is starting to sink in that I
> really need to spend some hours sitting in it getting used to the
> instrumentation (I have never used glass cockpit before this). So
> there is a need to sit in the airplane with shore power connected to
> keep from running down the EarthX battery. But I am concerned about
> using shore power with lithium battery technology because of their
> charging sensitivities. What do you guys think? Would it be okay to
> connect an adjustable power supply to the electrical system, with the
> battery in place? If so, what should I set the voltage for? The
> problem is that pulling the battery is a bit of a hassle and takes
> about a half hour. Same for installation. It would be better if I
> could just plug in.
>
> Thanks,
>
> Ken
>
Message 4
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| Subject: | Re: shore power combined with LiFePO battery |
At 10:32 AM 6/26/2019, you wrote:
>I am finishing up my airplane and it is starting to sink in that I
>really need to spend some hours sitting in it getting used to the
>instrumentation (I have never used glass cockpit before this). So
>there is a need to sit in the airplane with shore power connected to
>keep from running down the EarthX battery. But I am concerned about
>using shore power with lithium battery technology because of their
>charging sensitivities. What do you guys think? Would it be okay to
>connect an adjustable power supply to the electrical system, with
>the battery in place? If so, what should I set the voltage for? The
>problem is that pulling the battery is a bit of a hassle and takes
>about a half hour. Same for installation. It would be better if I
>could just plug in.
How about a ground power connector?
alternatively . . .
How hard is it to get to the hot
side of your starter contactor?
You can clip the (+) lead from the
power supply directly to the nut
on the battery-side stud. Set the
power supply for 14v before turning
it on.
Emacs!
Clips like these are good for 30+
amps and would handle your needs
nicely. Obviously, the (-) clip
goes to handy ground.
Leave ship's master switch OFF.
Bob . . .
Message 5
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| Subject: | Re: shore power combined with LiFePO battery |
Thanks Bob. Your gentle reminder that the battery is not connected to the
rest of the system until the master switch is turned on opens up a number
of possible solutions.
Ken
On Wed, Jun 26, 2019, 10:06 Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 10:32 AM 6/26/2019, you wrote:
>
> I am finishing up my airplane and it is starting to sink in that I really
> need to spend some hours sitting in it getting used to the instrumentation
> (I have never used glass cockpit before this). So there is a need to sit in
> the airplane with shore power connected to keep from running down the
> EarthX battery. But I am concerned about using shore power with lithium
> battery technology because of their charging sensitivities. What do you
> guys think? Would it be okay to connect an adjustable power supply to the
> electrical system, with the battery in place? If so, what should I set the
> voltage for? The problem is that pulling the battery is a bit of a hassle
> and takes about a half hour. Same for installation. It would be better if I
> could just plug in.
>
>
> How about a ground power connector?
>
> alternatively . . .
>
> How hard is it to get to the hot
> side of your starter contactor?
>
> You can clip the (+) lead from the
> power supply directly to the nut
> on the battery-side stud. Set the
> power supply for 14v before turning
> it on.
>
> [image: Emacs!]
>
> Clips like these are good for 30+
> amps and would handle your needs
> nicely. Obviously, the (-) clip
> goes to handy ground.
>
> Leave ship's master switch OFF.
>
>
> Bob . . .
>
Message 6
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| Subject: | Re: Antenna Ground Plane |
Thank you for sharing guys it really helps me
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489879#489879
Message 7
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| Subject: | Re: The joys of a Z-14 during an charging system failure |
Thank you man,it really works
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489880#489880
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