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From: John Barrett <2thman1@gmail.com>
Subject: Re: [LML] Odyssey Batteries

I'll chime in too I guess.

Am on my second set of two PC 680s.  My system sounds like a clone of Fred's=
.  It has two separate busses, 70 amp alt on one side normally operating at a=
bout 36 amps and 20 amp B&C on the other bus and it usually draws about 7 am=
ps during cruise flight.  X-tie occurs at startup, in any bus failure and ca=
n be manually selected.  Main difference is mine is controlled automatically=
 by Vertical Power VP 200.

The first set of batteries grew tired due to terrible abuse over several yea=
rs in build shops,  they were recharged most of the time with older chargers=
 and were drained and recharged so many times, estimating the number would b=
e impossible. =20

I replaced both a bit over a year ago and now use a battery minder that is c=
ompatible to the extent that both manuals (battery and charger) reference th=
e other brand and indicate the settings to be used.

Early in my flight testing program I had plaguing electrical issues that wou=
ld frequently kick the electrical to the E bus and often times would even fa=
il that.  I can't say that necessarily put extra stress on the batteries, bu=
t I don't imagine it was particularly good for any part of the system. =20

I was doing a lot of charging last year during the time we were trying to id=
entify and solve the problem.  That was prior to acquisition of the minder b=
ut the batteries were never drained or particularly stressed I don't think.

Now the electrical busses are properly balanced so the electrical performs c=
orrectly and the batteries seem to be very happy.  I still put the minder on=
 after I run electrical on the ground or leave it for a period of time.  The=
 batteries take up little space on the fire wall and since real estate under=
 the cowl is precious, that's good.  They are relatively light weight so the=
re is very little down side to these.  I'm all electric so I should develop a=
 replacement program, but the darn things are so bulletproof I don't know wh=
at the cycle should be.  Maybe one every two years?  Anyone have advice abou=
t that?

The old Odyssey batteries I took out last year are still around.  I tried to=
 charge one of them and it never reached the charged stage in 24 hours.  I'v=
e got it on the recondition cycle as of last night and it will be interestin=
g to see if it recovers.

John Barrett


Sent from my iPad


On Jun 23, 2013, at 4:41 AM, WAYNE F MARSHALL <paradoxmaybe@me.com> wrote:

>=20
> I love my Odyssey batteries installed in my Legacy. Going strong for 5 yea=
rs now. Even if I don't fly for a month because of weather, maintenance or t=
ravel, when I return and crank it is like they are brand new!
> Wayne Marshall
> N54KM
>=20
>=20
> --
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