COACH BATTERIES

[Henry Jay Hannigan]

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












--- 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@)
> >
>