COACH BATTERIES

[Michael]

Now Hank.. I used that many words so you'd know I did NOT say 12v is
better than 6v. I said 12v batteries would be more appealing to
older coaches with less room for batteries. They are easier to deal
with in terms of weight, maintenance, etc.. Unless you have a big
nice tray that slides out to inspect your batteries...

Michael
78FC35
(hotter in Phx) hee hee hee

--- In WanderlodgeForum@yahoogroups.com, "Henry Jay Hannigan"
wrote:
>
> After 25 years as an elctro whizbang, u learned KISS and then
> proceeded to take five paragraphs to say 12 volt bat's were mo
betta.
>
> Reagardless, after my 67 yrs on earth, I/m sticking to my TROJAN T-
> 105 six volts for my "house," LOL
> Regards,
> Hank
> 90SP36 still in hot Vegas
>
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> --- In WanderlodgeForum@yahoogroups.com, "Michael" <mike.putz@>
> wrote:
> >
> > Very interesting Thread. Being an Electro-Mechanical Technician
> for
> > Motorola for 25 years has taught me several things, as well as
> owning
> > bus conversions for over 20 years.
> >
> > 1) The definition of a Technician - an Engineer's only link to
> > reality.
> >
> > 2) KISS - Keep It Simple Stupid.
> >
> > 3) The nice things about "standards" is there are so many to
choose
> > from. :-)
> >
> > I'm no battery expert but do know a thing or two about keeping
> > equipment running for long periods of time. Some designs have
> built
> > in weaknesses (series circuits), and some have built in
redundancy
> > (parallel circuits). So 12v parallel systems are superior if you
> > view them from a "survival" stance. Sure you can throw more
money
> > and more batteries into a 6v battery system, but then there's my
> > point.
> >
> > Some batteries do have memory, some don't. Some can be damaged
> just
> > by charging with your engine's alternator, some don't. The more
> > expensive and high tech the battery, the more expensive and high
> tech
> > the maintenance and charging system. Thin plates on starting
> > batteries, thick on deep cycle, etc I do say stick to one or the
> > other; hybrids do both fair but is not specialized as the
starting
> > and deep cycle.
> >
> > I'm not a fan of putting thousands of dollars in battery banks,
> huge
> > inverters, and special chargers just to avoid running a generator
> to
> > use my AC's down the road. That's what generators were designed
to
> > do. What our Engineer friend was trying to say is that ANY
> > connection is not as good as a straight wire. And if the
straight
> > wire is not the correct gauge even it can be an issue.
> >
> > Running 20 amps on an inverter is at least 200+ amps on the DC
> side.
> > I'm not going into details about efficiencies, etc.. but it is
> > probably more like 220+ amps. At those currents even a small bit
> of
> > corrosion, dirt, wrong wire size, or any other contaminant that
> might
> > cause resistance is devastating. Do you realize it would only
take
> a
> > resistance of .005 ohms to loose an entire volt! It's very easy
to
> > have that kind of resistance and not be able to find it,
especially
> > with the added connections of a 6v system.
> >
> > Running multiple batteries in a series/parallel config is
superior
> to
> > running the 12v counter parts in parallel... IF..IF.. you only
look
> > at performance! If you do believe it is the BEST choice then you
> too
> > are living in an ideal Engineers' world! There are Mean Time
> Between
> > Failure (MTBF) numbers that needs to be looked at. Even if the
6v
> > golf battery is superior to a cheap 12v deep cycle it does make
> > itself vulnerable simply by design. A bad 6v battery will bring
> you
> > down. A bad 12v battery simply needs to be removed and you can
go
> on.
> >
> > If you compare EVERY THING, the cost, size, weight, and design
> > limitations it doesn't make 6v batteries very appealing in my
book
> > for the small spaces available on the older coaches. Plus,
unless
> > you have special needs (long dry camping or running an AC) then
> your
> > bank will only be a few batteries.
> >
> > Using cheap Walmart MAXX-29 batteries for $76 a piece allows you
to
> > have 3 batteries in parallel for a rating of 375 ah. The cost is
> > low, the space and weight are low. The area the battery consumes
> is
> > 636 cu in each. The 6v equivalent (2 batteries) has an area at
> > closer to 4003 cu in, over 6 times more area and how much more
> > weight? How much more cost? I know you can try to justify cost
> over
> > time, but with the prorating on batteries these days, we're just
> > renting them anyway so that has little meaning now.
> >
> > Bottom line is for most people who will not take the time to do
the
> > proper maintenance, invest big dollars in expensive
> > monitoring/charging systems, or have special needs, then 12v
> parallel
> > systems ARE superior to their 6v counter parts.
> >
> > Hope I didn't put too much fuel on the fire?
> >
> > Michael & Tami
> > 63FC35 - "Freedom Bus"
> > 78FC35 - "Putz'n Around"
> > 82FC35 - parts
> > 82 GMC RTS
> > Mesa, Az
> >
> >
> >
> >
> > --- In WanderlodgeForum@yahoogroups.com, Ron Thompson
> > wrote:
> > >
> > > I can't help but comment on this one.
> > >
> > > Old and new batteries mixed would most likely have eddy
currents
> > flowing between the batteries due to deterioration of th internal
> > currents and would definitely have reducing effect on the AH and
> > therefore the cranking amps too.
> > >
> > > There are good points on both sides of this discussion. No
need
> to
> > beat each other up.
> > >
> > > Oh by the way my qualifications are over 30 years experience
> > electronics with an engineering background. Not a graduate
> engineer
> > but definitely schooled in several good engineering schools. In
> > summary I was a practical applications electronic tech.
> > >
> > > Just my two cents.
> > >
> > > Ron Thompson
> > > 1995 WLWB 42'
> > >
> > > hippieforever3 wrote: > I
> > am not an engineer ( nor did I play one on TV) but what you are
> > > > suggesting goes against avery article I have ever read. Some
> > were
> > > > written by battery mfr. engineers.
> > >
> > > Show me one.
> > >
> > > > You are never supposed to mix old
> > > > and new battreies in a battery bank!
> > >
> > > Why??? Please use science, physics or electronics or
references.
> > >
> > > > 6 volt golf cart batteries will
> > > > give you longer life than any common wet cell deep cycle 12
> > volt.
> > > They
> > > > are sturdy and made to handle frequent discharge.
> > >
> > > It is very likely that the manufacturers design almost all 6
> volt
> > > batteries to withstand more abuse like 100% discharge,
> temperature
> > > extremes and vibration. However if you get a 12 volt battery
> from
> > the
> > > same manufacturer, built to the same design spec and use it in
> the
> > > same application, the 12 volt system will last longer and
> > outperform
> > > the 6 volt with less maintenance.
> > >
> > > Regards,
> > > GPSGary
> > >
> > >
> > >
> > >
> > >
> > >
> > > Ron Thompson -Waller, Tx.
> > > 1995 WLWB 42'Blue Bird
> > > (cockyfox@)
> > >
> >
>