Agreed ... but :-) ... in the boating world for example, battery banks of
identical (same type, age, manufacturer) batteries are connected and charged
in parallel for weight distribution purposes, for increased amp-hours
purposes, for hot backup purposes ... so I figure if Jeepster does have two
identical batteries kicking around and could use the extra amp-hours, then
there would seem to be low risk running them in parallel.

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:415B17FF.F51D19D@sympatico.ca...
> You just need a knife blade switch to turn the second battery's output
> into a parallel starter feed when needed for a boost.
>
> Charging two batteries in parallel isn't really good for long term use.
> One always can take more than the other so one can get cooked dry
> literally over time.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Bowgus wrote:
> >
> > My interpretation of that isolator article and diagram ... it allows
both
> > batteries to charge alright, but one battery is used for say starting,
and
> > the other battery is used for other things ... e.g. a winch ... and ...
> > current will not flow through the isolator from one battery to the other
to
> > assist with starting. My understanding, you want the two batteries to
> > operate in parallel for extra starting capability. If that's the case,
why
> > not just connect both batteries in parallel as others have suggested,
and
> > that's that.
> >
> > OT: and the isolator looks to be solid state probably having a back to
back
> > diode setup with a diode drop (say minimum 0.7 V) to each battery
> > effectively reducing the charging voltage at both batterys ... unless
you've
> > got remote sensing anon anon anon. Geez ... anyone remember that
question on
> > the final ... design a power supply ... using I think it was a 723
> > regulator?
> >
> > "Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > news:lbekl0d7aibdm2jctra22mh66hqf7anm9t@4ax.com...
> > > My intention with this is to have that little extra boost for starting
> > > in cold weather. Where I live it can get down to -40C during the
> > > winter and I work 12 hour shifts and many times after a shift I will
> > > find that the breaker has tripped on the plug-ins at work.
> > >
> > > After a bit more Google groups searching tonight I found an old post
> > > here and a simple circuit using an isolator..... this looks like it
> > > might be the ticket for what I had in mind.
> > > This isn't a necessity really but hell I have a spare battery that is
> > > identical to one I have in my Jeep and both have been bought in the
> > > last 6 months and to be quite frank I'm looking for a new project to
> > > keep me busy. :)
> > >
> > > http://www.sierrajeep.com/basic.htm
> > >
> > > My Page: http://clubweb.interbaun.com/kb57/jeep/
> > >
> > >
> > >
> > > On Wed, 29 Sep 2004 03:19:10 GMT, "Steve G"
> > > <NospamforSteve@Steve-Garner.com> wrote:
> > >
> > > >What exactly do you want to do? You can have them continually
connected,
> > > >large cables pos tyo pos, neg to neg. You are drawing on both batt
all
> > of
> > > >the time and charging both all the time. Are you confusing this with
> > dual
> > > >batt set up in Motorhomes/trucks with campers? Those use a battery
> > isolater
> > > >so that the batteries are connected with a smaller gauge, 10 or 12
ga,
> > only
> > > >when the vehicle is running so they charge together but are
disconnected
> > > >when not running. This is so you can run the coach int off one
battery
> > and
> > > >drain it completely and still be able to start on the chassis batt.
Some
> > > >use a solenoid on a button to connect the two via heavy cabling for
> > > >emergency boosting the chassis batt from the coach batt. You don't
need
> > all
> > > >of this. Just connect them together with heavy cabling.
> > > >Personally, I wouldn't bother. You're better off with one larger amp
> > batt
> > > >then two smaller.
> > > >Steve g.
> > > >"Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > >news:k57kl0pskk9u9q0nvhbk9p7bmj1fvdk9jv@4ax.com.. .
> > > >> My son just bought a 1999 TJ and it just so happens 2 weeks ago we
put
> > > >> a new battery in his old 93 YJ, the dealership was a real pain to
deal
> > > >> with so they are getting the trade vehicle with the old worn out
> > > >> battery. :)
> > > >>
> > > >> Now I'm looking at this shiney new battery and thinking hell why
not
> > > >> install a dual battery setup to help during the very cold winters
we
> > > >> get here in Alberta.
> > > >>
> > > >> I have been looking at setups and some seem very complicated and
> > > >> possibly prone to future problems and all I really want is to have
a
> > > >> spare battery.
> > > >>
> > > >> Has anyone ever used a setup like this one?
> > > >> Will my stock alternator have enough jam to run a dual system?
> > > >>
> > > >> BTW I can't understand why he installed the switch on his dash like
he
> > > >> did...just plain ugly imho.
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >
> > >

 

Just Say NO To Stripes! But what do I know, I don't like chrome hinges
either. NICE YJ!!!!!!!!!!!!!

Jeepster wrote:
> BTW..... Opinions please>
> I just had my 87 YJ painted and I like the plain look (see my page)
> with no decals or pinstriping on it, the wife says I should jazz it up
> a bit.
> What do you folks think?
>
> My page: http://clubweb.interbaun.com/kb57/jeep/

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________

 

Just Say NO To Stripes! But what do I know, I don't like chrome hinges
either. NICE YJ!!!!!!!!!!!!!

Jeepster wrote:
> BTW..... Opinions please>
> I just had my 87 YJ painted and I like the plain look (see my page)
> with no decals or pinstriping on it, the wife says I should jazz it up
> a bit.
> What do you folks think?
>
> My page: http://clubweb.interbaun.com/kb57/jeep/

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________

 

Just Say NO To Stripes! But what do I know, I don't like chrome hinges
either. NICE YJ!!!!!!!!!!!!!

Jeepster wrote:
> BTW..... Opinions please>
> I just had my 87 YJ painted and I like the plain look (see my page)
> with no decals or pinstriping on it, the wife says I should jazz it up
> a bit.
> What do you folks think?
>
> My page: http://clubweb.interbaun.com/kb57/jeep/

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________

 

I used to run a fleet of electric powered boats and I used to charge two
of them in parallel to save buying more chargers until I started
noticing far too many batteries were boiling hard while the one next to
it was just bubbling.

All the batteries were bought at the same time, but they weren't all
discharged the same so I figured the results were exaggerated but none
the less there was a radical difference in the charging rates between
these 'identical' batteries. These were deep cell marine batteries
too. They are much more forgiving when overcharging or over
discharging.

Hey you could be fine doing it that way, but on regular batteries I
would figure their life would be lower because of the above.

Or at least use batteries that you can open up to top up with distilled
water if one charges faster than the other.

When or if I go dual batteries, I will isolate them and have the knife
switch for boosting while running my winch and lights off the secondary
battery.

Mike

Bowgus wrote:
>
> Agreed ... but :-) ... in the boating world for example, battery banks of
> identical (same type, age, manufacturer) batteries are connected and charged
> in parallel for weight distribution purposes, for increased amp-hours
> purposes, for hot backup purposes ... so I figure if Jeepster does have two
> identical batteries kicking around and could use the extra amp-hours, then
> there would seem to be low risk running them in parallel.
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:415B17FF.F51D19D@sympatico.ca...
> > You just need a knife blade switch to turn the second battery's output
> > into a parallel starter feed when needed for a boost.
> >
> > Charging two batteries in parallel isn't really good for long term use.
> > One always can take more than the other so one can get cooked dry
> > literally over time.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Bowgus wrote:
> > >
> > > My interpretation of that isolator article and diagram ... it allows
> both
> > > batteries to charge alright, but one battery is used for say starting,
> and
> > > the other battery is used for other things ... e.g. a winch ... and ...
> > > current will not flow through the isolator from one battery to the other
> to
> > > assist with starting. My understanding, you want the two batteries to
> > > operate in parallel for extra starting capability. If that's the case,
> why
> > > not just connect both batteries in parallel as others have suggested,
> and
> > > that's that.
> > >
> > > OT: and the isolator looks to be solid state probably having a back to
> back
> > > diode setup with a diode drop (say minimum 0.7 V) to each battery
> > > effectively reducing the charging voltage at both batterys ... unless
> you've
> > > got remote sensing anon anon anon. Geez ... anyone remember that
> question on
> > > the final ... design a power supply ... using I think it was a 723
> > > regulator?
> > >
> > > "Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > news:lbekl0d7aibdm2jctra22mh66hqf7anm9t@4ax.com...
> > > > My intention with this is to have that little extra boost for starting
> > > > in cold weather. Where I live it can get down to -40C during the
> > > > winter and I work 12 hour shifts and many times after a shift I will
> > > > find that the breaker has tripped on the plug-ins at work.
> > > >
> > > > After a bit more Google groups searching tonight I found an old post
> > > > here and a simple circuit using an isolator..... this looks like it
> > > > might be the ticket for what I had in mind.
> > > > This isn't a necessity really but hell I have a spare battery that is
> > > > identical to one I have in my Jeep and both have been bought in the
> > > > last 6 months and to be quite frank I'm looking for a new project to
> > > > keep me busy. :)
> > > >
> > > > http://www.sierrajeep.com/basic.htm
> > > >
> > > > My Page: http://clubweb.interbaun.com/kb57/jeep/
> > > >
> > > >
> > > >
> > > > On Wed, 29 Sep 2004 03:19:10 GMT, "Steve G"
> > > > <NospamforSteve@Steve-Garner.com> wrote:
> > > >
> > > > >What exactly do you want to do? You can have them continually
> connected,
> > > > >large cables pos tyo pos, neg to neg. You are drawing on both batt
> all
> > > of
> > > > >the time and charging both all the time. Are you confusing this with
> > > dual
> > > > >batt set up in Motorhomes/trucks with campers? Those use a battery
> > > isolater
> > > > >so that the batteries are connected with a smaller gauge, 10 or 12
> ga,
> > > only
> > > > >when the vehicle is running so they charge together but are
> disconnected
> > > > >when not running. This is so you can run the coach int off one
> battery
> > > and
> > > > >drain it completely and still be able to start on the chassis batt.
> Some
> > > > >use a solenoid on a button to connect the two via heavy cabling for
> > > > >emergency boosting the chassis batt from the coach batt. You don't
> need
> > > all
> > > > >of this. Just connect them together with heavy cabling.
> > > > >Personally, I wouldn't bother. You're better off with one larger amp
> > > batt
> > > > >then two smaller.
> > > > >Steve g.
> > > > >"Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > > >news:k57kl0pskk9u9q0nvhbk9p7bmj1fvdk9jv@4ax.com.. .
> > > > >> My son just bought a 1999 TJ and it just so happens 2 weeks ago we
> put
> > > > >> a new battery in his old 93 YJ, the dealership was a real pain to
> deal
> > > > >> with so they are getting the trade vehicle with the old worn out
> > > > >> battery. :)
> > > > >>
> > > > >> Now I'm looking at this shiney new battery and thinking hell why
> not
> > > > >> install a dual battery setup to help during the very cold winters
> we
> > > > >> get here in Alberta.
> > > > >>
> > > > >> I have been looking at setups and some seem very complicated and
> > > > >> possibly prone to future problems and all I really want is to have
> a
> > > > >> spare battery.
> > > > >>
> > > > >> Has anyone ever used a setup like this one?
> > > > >> Will my stock alternator have enough jam to run a dual system?
> > > > >>
> > > > >> BTW I can't understand why he installed the switch on his dash like
> he
> > > > >> did...just plain ugly imho.
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >
> > > >

 

I used to run a fleet of electric powered boats and I used to charge two
of them in parallel to save buying more chargers until I started
noticing far too many batteries were boiling hard while the one next to
it was just bubbling.

All the batteries were bought at the same time, but they weren't all
discharged the same so I figured the results were exaggerated but none
the less there was a radical difference in the charging rates between
these 'identical' batteries. These were deep cell marine batteries
too. They are much more forgiving when overcharging or over
discharging.

Hey you could be fine doing it that way, but on regular batteries I
would figure their life would be lower because of the above.

Or at least use batteries that you can open up to top up with distilled
water if one charges faster than the other.

When or if I go dual batteries, I will isolate them and have the knife
switch for boosting while running my winch and lights off the secondary
battery.

Mike

Bowgus wrote:
>
> Agreed ... but :-) ... in the boating world for example, battery banks of
> identical (same type, age, manufacturer) batteries are connected and charged
> in parallel for weight distribution purposes, for increased amp-hours
> purposes, for hot backup purposes ... so I figure if Jeepster does have two
> identical batteries kicking around and could use the extra amp-hours, then
> there would seem to be low risk running them in parallel.
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:415B17FF.F51D19D@sympatico.ca...
> > You just need a knife blade switch to turn the second battery's output
> > into a parallel starter feed when needed for a boost.
> >
> > Charging two batteries in parallel isn't really good for long term use.
> > One always can take more than the other so one can get cooked dry
> > literally over time.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Bowgus wrote:
> > >
> > > My interpretation of that isolator article and diagram ... it allows
> both
> > > batteries to charge alright, but one battery is used for say starting,
> and
> > > the other battery is used for other things ... e.g. a winch ... and ...
> > > current will not flow through the isolator from one battery to the other
> to
> > > assist with starting. My understanding, you want the two batteries to
> > > operate in parallel for extra starting capability. If that's the case,
> why
> > > not just connect both batteries in parallel as others have suggested,
> and
> > > that's that.
> > >
> > > OT: and the isolator looks to be solid state probably having a back to
> back
> > > diode setup with a diode drop (say minimum 0.7 V) to each battery
> > > effectively reducing the charging voltage at both batterys ... unless
> you've
> > > got remote sensing anon anon anon. Geez ... anyone remember that
> question on
> > > the final ... design a power supply ... using I think it was a 723
> > > regulator?
> > >
> > > "Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > news:lbekl0d7aibdm2jctra22mh66hqf7anm9t@4ax.com...
> > > > My intention with this is to have that little extra boost for starting
> > > > in cold weather. Where I live it can get down to -40C during the
> > > > winter and I work 12 hour shifts and many times after a shift I will
> > > > find that the breaker has tripped on the plug-ins at work.
> > > >
> > > > After a bit more Google groups searching tonight I found an old post
> > > > here and a simple circuit using an isolator..... this looks like it
> > > > might be the ticket for what I had in mind.
> > > > This isn't a necessity really but hell I have a spare battery that is
> > > > identical to one I have in my Jeep and both have been bought in the
> > > > last 6 months and to be quite frank I'm looking for a new project to
> > > > keep me busy. :)
> > > >
> > > > http://www.sierrajeep.com/basic.htm
> > > >
> > > > My Page: http://clubweb.interbaun.com/kb57/jeep/
> > > >
> > > >
> > > >
> > > > On Wed, 29 Sep 2004 03:19:10 GMT, "Steve G"
> > > > <NospamforSteve@Steve-Garner.com> wrote:
> > > >
> > > > >What exactly do you want to do? You can have them continually
> connected,
> > > > >large cables pos tyo pos, neg to neg. You are drawing on both batt
> all
> > > of
> > > > >the time and charging both all the time. Are you confusing this with
> > > dual
> > > > >batt set up in Motorhomes/trucks with campers? Those use a battery
> > > isolater
> > > > >so that the batteries are connected with a smaller gauge, 10 or 12
> ga,
> > > only
> > > > >when the vehicle is running so they charge together but are
> disconnected
> > > > >when not running. This is so you can run the coach int off one
> battery
> > > and
> > > > >drain it completely and still be able to start on the chassis batt.
> Some
> > > > >use a solenoid on a button to connect the two via heavy cabling for
> > > > >emergency boosting the chassis batt from the coach batt. You don't
> need
> > > all
> > > > >of this. Just connect them together with heavy cabling.
> > > > >Personally, I wouldn't bother. You're better off with one larger amp
> > > batt
> > > > >then two smaller.
> > > > >Steve g.
> > > > >"Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > > >news:k57kl0pskk9u9q0nvhbk9p7bmj1fvdk9jv@4ax.com.. .
> > > > >> My son just bought a 1999 TJ and it just so happens 2 weeks ago we
> put
> > > > >> a new battery in his old 93 YJ, the dealership was a real pain to
> deal
> > > > >> with so they are getting the trade vehicle with the old worn out
> > > > >> battery. :)
> > > > >>
> > > > >> Now I'm looking at this shiney new battery and thinking hell why
> not
> > > > >> install a dual battery setup to help during the very cold winters
> we
> > > > >> get here in Alberta.
> > > > >>
> > > > >> I have been looking at setups and some seem very complicated and
> > > > >> possibly prone to future problems and all I really want is to have
> a
> > > > >> spare battery.
> > > > >>
> > > > >> Has anyone ever used a setup like this one?
> > > > >> Will my stock alternator have enough jam to run a dual system?
> > > > >>
> > > > >> BTW I can't understand why he installed the switch on his dash like
> he
> > > > >> did...just plain ugly imho.
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >
> > > >

 

I used to run a fleet of electric powered boats and I used to charge two
of them in parallel to save buying more chargers until I started
noticing far too many batteries were boiling hard while the one next to
it was just bubbling.

All the batteries were bought at the same time, but they weren't all
discharged the same so I figured the results were exaggerated but none
the less there was a radical difference in the charging rates between
these 'identical' batteries. These were deep cell marine batteries
too. They are much more forgiving when overcharging or over
discharging.

Hey you could be fine doing it that way, but on regular batteries I
would figure their life would be lower because of the above.

Or at least use batteries that you can open up to top up with distilled
water if one charges faster than the other.

When or if I go dual batteries, I will isolate them and have the knife
switch for boosting while running my winch and lights off the secondary
battery.

Mike

Bowgus wrote:
>
> Agreed ... but :-) ... in the boating world for example, battery banks of
> identical (same type, age, manufacturer) batteries are connected and charged
> in parallel for weight distribution purposes, for increased amp-hours
> purposes, for hot backup purposes ... so I figure if Jeepster does have two
> identical batteries kicking around and could use the extra amp-hours, then
> there would seem to be low risk running them in parallel.
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:415B17FF.F51D19D@sympatico.ca...
> > You just need a knife blade switch to turn the second battery's output
> > into a parallel starter feed when needed for a boost.
> >
> > Charging two batteries in parallel isn't really good for long term use.
> > One always can take more than the other so one can get cooked dry
> > literally over time.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Bowgus wrote:
> > >
> > > My interpretation of that isolator article and diagram ... it allows
> both
> > > batteries to charge alright, but one battery is used for say starting,
> and
> > > the other battery is used for other things ... e.g. a winch ... and ...
> > > current will not flow through the isolator from one battery to the other
> to
> > > assist with starting. My understanding, you want the two batteries to
> > > operate in parallel for extra starting capability. If that's the case,
> why
> > > not just connect both batteries in parallel as others have suggested,
> and
> > > that's that.
> > >
> > > OT: and the isolator looks to be solid state probably having a back to
> back
> > > diode setup with a diode drop (say minimum 0.7 V) to each battery
> > > effectively reducing the charging voltage at both batterys ... unless
> you've
> > > got remote sensing anon anon anon. Geez ... anyone remember that
> question on
> > > the final ... design a power supply ... using I think it was a 723
> > > regulator?
> > >
> > > "Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > news:lbekl0d7aibdm2jctra22mh66hqf7anm9t@4ax.com...
> > > > My intention with this is to have that little extra boost for starting
> > > > in cold weather. Where I live it can get down to -40C during the
> > > > winter and I work 12 hour shifts and many times after a shift I will
> > > > find that the breaker has tripped on the plug-ins at work.
> > > >
> > > > After a bit more Google groups searching tonight I found an old post
> > > > here and a simple circuit using an isolator..... this looks like it
> > > > might be the ticket for what I had in mind.
> > > > This isn't a necessity really but hell I have a spare battery that is
> > > > identical to one I have in my Jeep and both have been bought in the
> > > > last 6 months and to be quite frank I'm looking for a new project to
> > > > keep me busy. :)
> > > >
> > > > http://www.sierrajeep.com/basic.htm
> > > >
> > > > My Page: http://clubweb.interbaun.com/kb57/jeep/
> > > >
> > > >
> > > >
> > > > On Wed, 29 Sep 2004 03:19:10 GMT, "Steve G"
> > > > <NospamforSteve@Steve-Garner.com> wrote:
> > > >
> > > > >What exactly do you want to do? You can have them continually
> connected,
> > > > >large cables pos tyo pos, neg to neg. You are drawing on both batt
> all
> > > of
> > > > >the time and charging both all the time. Are you confusing this with
> > > dual
> > > > >batt set up in Motorhomes/trucks with campers? Those use a battery
> > > isolater
> > > > >so that the batteries are connected with a smaller gauge, 10 or 12
> ga,
> > > only
> > > > >when the vehicle is running so they charge together but are
> disconnected
> > > > >when not running. This is so you can run the coach int off one
> battery
> > > and
> > > > >drain it completely and still be able to start on the chassis batt.
> Some
> > > > >use a solenoid on a button to connect the two via heavy cabling for
> > > > >emergency boosting the chassis batt from the coach batt. You don't
> need
> > > all
> > > > >of this. Just connect them together with heavy cabling.
> > > > >Personally, I wouldn't bother. You're better off with one larger amp
> > > batt
> > > > >then two smaller.
> > > > >Steve g.
> > > > >"Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > > >news:k57kl0pskk9u9q0nvhbk9p7bmj1fvdk9jv@4ax.com.. .
> > > > >> My son just bought a 1999 TJ and it just so happens 2 weeks ago we
> put
> > > > >> a new battery in his old 93 YJ, the dealership was a real pain to
> deal
> > > > >> with so they are getting the trade vehicle with the old worn out
> > > > >> battery. :)
> > > > >>
> > > > >> Now I'm looking at this shiney new battery and thinking hell why
> not
> > > > >> install a dual battery setup to help during the very cold winters
> we
> > > > >> get here in Alberta.
> > > > >>
> > > > >> I have been looking at setups and some seem very complicated and
> > > > >> possibly prone to future problems and all I really want is to have
> a
> > > > >> spare battery.
> > > > >>
> > > > >> Has anyone ever used a setup like this one?
> > > > >> Will my stock alternator have enough jam to run a dual system?
> > > > >>
> > > > >> BTW I can't understand why he installed the switch on his dash like
> he
> > > > >> did...just plain ugly imho.
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >
> > > >

 

Actually :-) ... sealed batteries are the best bet ... that way they can't
be messed with and made different by say topping one up and not the other
.... okokok ... later buddy :-)

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:415C11B6.4772F5C2@sympatico.ca...
> I used to run a fleet of electric powered boats and I used to charge two
> of them in parallel to save buying more chargers until I started
> noticing far too many batteries were boiling hard while the one next to
> it was just bubbling.
>
> All the batteries were bought at the same time, but they weren't all
> discharged the same so I figured the results were exaggerated but none
> the less there was a radical difference in the charging rates between
> these 'identical' batteries. These were deep cell marine batteries
> too. They are much more forgiving when overcharging or over
> discharging.
>
> Hey you could be fine doing it that way, but on regular batteries I
> would figure their life would be lower because of the above.
>
> Or at least use batteries that you can open up to top up with distilled
> water if one charges faster than the other.
>
> When or if I go dual batteries, I will isolate them and have the knife
> switch for boosting while running my winch and lights off the secondary
> battery.
>
> Mike
>
> Bowgus wrote:
> >
> > Agreed ... but :-) ... in the boating world for example, battery banks
of
> > identical (same type, age, manufacturer) batteries are connected and
charged
> > in parallel for weight distribution purposes, for increased amp-hours
> > purposes, for hot backup purposes ... so I figure if Jeepster does have
two
> > identical batteries kicking around and could use the extra amp-hours,
then
> > there would seem to be low risk running them in parallel.
> >
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:415B17FF.F51D19D@sympatico.ca...
> > > You just need a knife blade switch to turn the second battery's output
> > > into a parallel starter feed when needed for a boost.
> > >
> > > Charging two batteries in parallel isn't really good for long term
use.
> > > One always can take more than the other so one can get cooked dry
> > > literally over time.
> > >
> > > Mike
> > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > 88 Cherokee 235 BFG AT's
> > >
> > > Bowgus wrote:
> > > >
> > > > My interpretation of that isolator article and diagram ... it allows
> > both
> > > > batteries to charge alright, but one battery is used for say
starting,
> > and
> > > > the other battery is used for other things ... e.g. a winch ... and
....
> > > > current will not flow through the isolator from one battery to the
other
> > to
> > > > assist with starting. My understanding, you want the two batteries
to
> > > > operate in parallel for extra starting capability. If that's the
case,
> > why
> > > > not just connect both batteries in parallel as others have
suggested,
> > and
> > > > that's that.
> > > >
> > > > OT: and the isolator looks to be solid state probably having a back
to
> > back
> > > > diode setup with a diode drop (say minimum 0.7 V) to each battery
> > > > effectively reducing the charging voltage at both batterys ...
unless
> > you've
> > > > got remote sensing anon anon anon. Geez ... anyone remember that
> > question on
> > > > the final ... design a power supply ... using I think it was a 723
> > > > regulator?
> > > >
> > > > "Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > > news:lbekl0d7aibdm2jctra22mh66hqf7anm9t@4ax.com...
> > > > > My intention with this is to have that little extra boost for
starting
> > > > > in cold weather. Where I live it can get down to -40C during the
> > > > > winter and I work 12 hour shifts and many times after a shift I
will
> > > > > find that the breaker has tripped on the plug-ins at work.
> > > > >
> > > > > After a bit more Google groups searching tonight I found an old
post
> > > > > here and a simple circuit using an isolator..... this looks like
it
> > > > > might be the ticket for what I had in mind.
> > > > > This isn't a necessity really but hell I have a spare battery that
is
> > > > > identical to one I have in my Jeep and both have been bought in
the
> > > > > last 6 months and to be quite frank I'm looking for a new project
to
> > > > > keep me busy. :)
> > > > >
> > > > > http://www.sierrajeep.com/basic.htm
> > > > >
> > > > > My Page: http://clubweb.interbaun.com/kb57/jeep/
> > > > >
> > > > >
> > > > >
> > > > > On Wed, 29 Sep 2004 03:19:10 GMT, "Steve G"
> > > > > <NospamforSteve@Steve-Garner.com> wrote:
> > > > >
> > > > > >What exactly do you want to do? You can have them continually
> > connected,
> > > > > >large cables pos tyo pos, neg to neg. You are drawing on both
batt
> > all
> > > > of
> > > > > >the time and charging both all the time. Are you confusing this
with
> > > > dual
> > > > > >batt set up in Motorhomes/trucks with campers? Those use a
battery
> > > > isolater
> > > > > >so that the batteries are connected with a smaller gauge, 10 or
12
> > ga,
> > > > only
> > > > > >when the vehicle is running so they charge together but are
> > disconnected
> > > > > >when not running. This is so you can run the coach int off one
> > battery
> > > > and
> > > > > >drain it completely and still be able to start on the chassis
batt.
> > Some
> > > > > >use a solenoid on a button to connect the two via heavy cabling
for
> > > > > >emergency boosting the chassis batt from the coach batt. You
don't
> > need
> > > > all
> > > > > >of this. Just connect them together with heavy cabling.
> > > > > >Personally, I wouldn't bother. You're better off with one larger
amp
> > > > batt
> > > > > >then two smaller.
> > > > > >Steve g.
> > > > > >"Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > > > >news:k57kl0pskk9u9q0nvhbk9p7bmj1fvdk9jv@4ax.com.. .
> > > > > >> My son just bought a 1999 TJ and it just so happens 2 weeks ago
we
> > put
> > > > > >> a new battery in his old 93 YJ, the dealership was a real pain
to
> > deal
> > > > > >> with so they are getting the trade vehicle with the old worn
out
> > > > > >> battery. :)
> > > > > >>
> > > > > >> Now I'm looking at this shiney new battery and thinking hell
why
> > not
> > > > > >> install a dual battery setup to help during the very cold
winters
> > we
> > > > > >> get here in Alberta.
> > > > > >>
> > > > > >> I have been looking at setups and some seem very complicated
and
> > > > > >> possibly prone to future problems and all I really want is to
have
> > a
> > > > > >> spare battery.
> > > > > >>
> > > > > >> Has anyone ever used a setup like this one?
> > > > > >> Will my stock alternator have enough jam to run a dual system?
> > > > > >>
> > > > > >> BTW I can't understand why he installed the switch on his dash
like
> > he
> > > > > >> did...just plain ugly imho.
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >
> > > > >

 

Actually :-) ... sealed batteries are the best bet ... that way they can't
be messed with and made different by say topping one up and not the other
.... okokok ... later buddy :-)

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:415C11B6.4772F5C2@sympatico.ca...
> I used to run a fleet of electric powered boats and I used to charge two
> of them in parallel to save buying more chargers until I started
> noticing far too many batteries were boiling hard while the one next to
> it was just bubbling.
>
> All the batteries were bought at the same time, but they weren't all
> discharged the same so I figured the results were exaggerated but none
> the less there was a radical difference in the charging rates between
> these 'identical' batteries. These were deep cell marine batteries
> too. They are much more forgiving when overcharging or over
> discharging.
>
> Hey you could be fine doing it that way, but on regular batteries I
> would figure their life would be lower because of the above.
>
> Or at least use batteries that you can open up to top up with distilled
> water if one charges faster than the other.
>
> When or if I go dual batteries, I will isolate them and have the knife
> switch for boosting while running my winch and lights off the secondary
> battery.
>
> Mike
>
> Bowgus wrote:
> >
> > Agreed ... but :-) ... in the boating world for example, battery banks
of
> > identical (same type, age, manufacturer) batteries are connected and
charged
> > in parallel for weight distribution purposes, for increased amp-hours
> > purposes, for hot backup purposes ... so I figure if Jeepster does have
two
> > identical batteries kicking around and could use the extra amp-hours,
then
> > there would seem to be low risk running them in parallel.
> >
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:415B17FF.F51D19D@sympatico.ca...
> > > You just need a knife blade switch to turn the second battery's output
> > > into a parallel starter feed when needed for a boost.
> > >
> > > Charging two batteries in parallel isn't really good for long term
use.
> > > One always can take more than the other so one can get cooked dry
> > > literally over time.
> > >
> > > Mike
> > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > 88 Cherokee 235 BFG AT's
> > >
> > > Bowgus wrote:
> > > >
> > > > My interpretation of that isolator article and diagram ... it allows
> > both
> > > > batteries to charge alright, but one battery is used for say
starting,
> > and
> > > > the other battery is used for other things ... e.g. a winch ... and
....
> > > > current will not flow through the isolator from one battery to the
other
> > to
> > > > assist with starting. My understanding, you want the two batteries
to
> > > > operate in parallel for extra starting capability. If that's the
case,
> > why
> > > > not just connect both batteries in parallel as others have
suggested,
> > and
> > > > that's that.
> > > >
> > > > OT: and the isolator looks to be solid state probably having a back
to
> > back
> > > > diode setup with a diode drop (say minimum 0.7 V) to each battery
> > > > effectively reducing the charging voltage at both batterys ...
unless
> > you've
> > > > got remote sensing anon anon anon. Geez ... anyone remember that
> > question on
> > > > the final ... design a power supply ... using I think it was a 723
> > > > regulator?
> > > >
> > > > "Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > > news:lbekl0d7aibdm2jctra22mh66hqf7anm9t@4ax.com...
> > > > > My intention with this is to have that little extra boost for
starting
> > > > > in cold weather. Where I live it can get down to -40C during the
> > > > > winter and I work 12 hour shifts and many times after a shift I
will
> > > > > find that the breaker has tripped on the plug-ins at work.
> > > > >
> > > > > After a bit more Google groups searching tonight I found an old
post
> > > > > here and a simple circuit using an isolator..... this looks like
it
> > > > > might be the ticket for what I had in mind.
> > > > > This isn't a necessity really but hell I have a spare battery that
is
> > > > > identical to one I have in my Jeep and both have been bought in
the
> > > > > last 6 months and to be quite frank I'm looking for a new project
to
> > > > > keep me busy. :)
> > > > >
> > > > > http://www.sierrajeep.com/basic.htm
> > > > >
> > > > > My Page: http://clubweb.interbaun.com/kb57/jeep/
> > > > >
> > > > >
> > > > >
> > > > > On Wed, 29 Sep 2004 03:19:10 GMT, "Steve G"
> > > > > <NospamforSteve@Steve-Garner.com> wrote:
> > > > >
> > > > > >What exactly do you want to do? You can have them continually
> > connected,
> > > > > >large cables pos tyo pos, neg to neg. You are drawing on both
batt
> > all
> > > > of
> > > > > >the time and charging both all the time. Are you confusing this
with
> > > > dual
> > > > > >batt set up in Motorhomes/trucks with campers? Those use a
battery
> > > > isolater
> > > > > >so that the batteries are connected with a smaller gauge, 10 or
12
> > ga,
> > > > only
> > > > > >when the vehicle is running so they charge together but are
> > disconnected
> > > > > >when not running. This is so you can run the coach int off one
> > battery
> > > > and
> > > > > >drain it completely and still be able to start on the chassis
batt.
> > Some
> > > > > >use a solenoid on a button to connect the two via heavy cabling
for
> > > > > >emergency boosting the chassis batt from the coach batt. You
don't
> > need
> > > > all
> > > > > >of this. Just connect them together with heavy cabling.
> > > > > >Personally, I wouldn't bother. You're better off with one larger
amp
> > > > batt
> > > > > >then two smaller.
> > > > > >Steve g.
> > > > > >"Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > > > >news:k57kl0pskk9u9q0nvhbk9p7bmj1fvdk9jv@4ax.com.. .
> > > > > >> My son just bought a 1999 TJ and it just so happens 2 weeks ago
we
> > put
> > > > > >> a new battery in his old 93 YJ, the dealership was a real pain
to
> > deal
> > > > > >> with so they are getting the trade vehicle with the old worn
out
> > > > > >> battery. :)
> > > > > >>
> > > > > >> Now I'm looking at this shiney new battery and thinking hell
why
> > not
> > > > > >> install a dual battery setup to help during the very cold
winters
> > we
> > > > > >> get here in Alberta.
> > > > > >>
> > > > > >> I have been looking at setups and some seem very complicated
and
> > > > > >> possibly prone to future problems and all I really want is to
have
> > a
> > > > > >> spare battery.
> > > > > >>
> > > > > >> Has anyone ever used a setup like this one?
> > > > > >> Will my stock alternator have enough jam to run a dual system?
> > > > > >>
> > > > > >> BTW I can't understand why he installed the switch on his dash
like
> > he
> > > > > >> did...just plain ugly imho.
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >
> > > > >

 

Actually :-) ... sealed batteries are the best bet ... that way they can't
be messed with and made different by say topping one up and not the other
.... okokok ... later buddy :-)

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:415C11B6.4772F5C2@sympatico.ca...
> I used to run a fleet of electric powered boats and I used to charge two
> of them in parallel to save buying more chargers until I started
> noticing far too many batteries were boiling hard while the one next to
> it was just bubbling.
>
> All the batteries were bought at the same time, but they weren't all
> discharged the same so I figured the results were exaggerated but none
> the less there was a radical difference in the charging rates between
> these 'identical' batteries. These were deep cell marine batteries
> too. They are much more forgiving when overcharging or over
> discharging.
>
> Hey you could be fine doing it that way, but on regular batteries I
> would figure their life would be lower because of the above.
>
> Or at least use batteries that you can open up to top up with distilled
> water if one charges faster than the other.
>
> When or if I go dual batteries, I will isolate them and have the knife
> switch for boosting while running my winch and lights off the secondary
> battery.
>
> Mike
>
> Bowgus wrote:
> >
> > Agreed ... but :-) ... in the boating world for example, battery banks
of
> > identical (same type, age, manufacturer) batteries are connected and
charged
> > in parallel for weight distribution purposes, for increased amp-hours
> > purposes, for hot backup purposes ... so I figure if Jeepster does have
two
> > identical batteries kicking around and could use the extra amp-hours,
then
> > there would seem to be low risk running them in parallel.
> >
> > "Mike Romain" <romainm@sympatico.ca> wrote in message
> > news:415B17FF.F51D19D@sympatico.ca...
> > > You just need a knife blade switch to turn the second battery's output
> > > into a parallel starter feed when needed for a boost.
> > >
> > > Charging two batteries in parallel isn't really good for long term
use.
> > > One always can take more than the other so one can get cooked dry
> > > literally over time.
> > >
> > > Mike
> > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > > 88 Cherokee 235 BFG AT's
> > >
> > > Bowgus wrote:
> > > >
> > > > My interpretation of that isolator article and diagram ... it allows
> > both
> > > > batteries to charge alright, but one battery is used for say
starting,
> > and
> > > > the other battery is used for other things ... e.g. a winch ... and
....
> > > > current will not flow through the isolator from one battery to the
other
> > to
> > > > assist with starting. My understanding, you want the two batteries
to
> > > > operate in parallel for extra starting capability. If that's the
case,
> > why
> > > > not just connect both batteries in parallel as others have
suggested,
> > and
> > > > that's that.
> > > >
> > > > OT: and the isolator looks to be solid state probably having a back
to
> > back
> > > > diode setup with a diode drop (say minimum 0.7 V) to each battery
> > > > effectively reducing the charging voltage at both batterys ...
unless
> > you've
> > > > got remote sensing anon anon anon. Geez ... anyone remember that
> > question on
> > > > the final ... design a power supply ... using I think it was a 723
> > > > regulator?
> > > >
> > > > "Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > > news:lbekl0d7aibdm2jctra22mh66hqf7anm9t@4ax.com...
> > > > > My intention with this is to have that little extra boost for
starting
> > > > > in cold weather. Where I live it can get down to -40C during the
> > > > > winter and I work 12 hour shifts and many times after a shift I
will
> > > > > find that the breaker has tripped on the plug-ins at work.
> > > > >
> > > > > After a bit more Google groups searching tonight I found an old
post
> > > > > here and a simple circuit using an isolator..... this looks like
it
> > > > > might be the ticket for what I had in mind.
> > > > > This isn't a necessity really but hell I have a spare battery that
is
> > > > > identical to one I have in my Jeep and both have been bought in
the
> > > > > last 6 months and to be quite frank I'm looking for a new project
to
> > > > > keep me busy. :)
> > > > >
> > > > > http://www.sierrajeep.com/basic.htm
> > > > >
> > > > > My Page: http://clubweb.interbaun.com/kb57/jeep/
> > > > >
> > > > >
> > > > >
> > > > > On Wed, 29 Sep 2004 03:19:10 GMT, "Steve G"
> > > > > <NospamforSteve@Steve-Garner.com> wrote:
> > > > >
> > > > > >What exactly do you want to do? You can have them continually
> > connected,
> > > > > >large cables pos tyo pos, neg to neg. You are drawing on both
batt
> > all
> > > > of
> > > > > >the time and charging both all the time. Are you confusing this
with
> > > > dual
> > > > > >batt set up in Motorhomes/trucks with campers? Those use a
battery
> > > > isolater
> > > > > >so that the batteries are connected with a smaller gauge, 10 or
12
> > ga,
> > > > only
> > > > > >when the vehicle is running so they charge together but are
> > disconnected
> > > > > >when not running. This is so you can run the coach int off one
> > battery
> > > > and
> > > > > >drain it completely and still be able to start on the chassis
batt.
> > Some
> > > > > >use a solenoid on a button to connect the two via heavy cabling
for
> > > > > >emergency boosting the chassis batt from the coach batt. You
don't
> > need
> > > > all
> > > > > >of this. Just connect them together with heavy cabling.
> > > > > >Personally, I wouldn't bother. You're better off with one larger
amp
> > > > batt
> > > > > >then two smaller.
> > > > > >Steve g.
> > > > > >"Jeepster" <yj_driver@NOSPAM___.com> wrote in message
> > > > > >news:k57kl0pskk9u9q0nvhbk9p7bmj1fvdk9jv@4ax.com.. .
> > > > > >> My son just bought a 1999 TJ and it just so happens 2 weeks ago
we
> > put
> > > > > >> a new battery in his old 93 YJ, the dealership was a real pain
to
> > deal
> > > > > >> with so they are getting the trade vehicle with the old worn
out
> > > > > >> battery. :)
> > > > > >>
> > > > > >> Now I'm looking at this shiney new battery and thinking hell
why
> > not
> > > > > >> install a dual battery setup to help during the very cold
winters
> > we
> > > > > >> get here in Alberta.
> > > > > >>
> > > > > >> I have been looking at setups and some seem very complicated
and
> > > > > >> possibly prone to future problems and all I really want is to
have
> > a
> > > > > >> spare battery.
> > > > > >>
> > > > > >> Has anyone ever used a setup like this one?
> > > > > >> Will my stock alternator have enough jam to run a dual system?
> > > > > >>
> > > > > >> BTW I can't understand why he installed the switch on his dash
like
> > he
> > > > > >> did...just plain ugly imho.
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >>
> > > > > >
> > > > >