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Discussion Starter #1
Does anyone have experience with the Dual Pro marine chargers? I was looking for some sealed chargers I can use on my conversion that can be mounted where they might be exposed to heat and rain. They charge each battery separately so you do not need to balance batteries. Thank you.

Ps I did check the EV album list and either this is a new charging system or not a good one as oly one person listed it.


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Discussion Starter #2
Hi David,

I have been testing a 4 bank Dual Pro on an old
version of a 48 volt IUV that I use around the
homestead. Seems to work pretty well. Had it for
about 4 or 5 months. Charge about 1 or 2 times a
week. I thought there might be an issue when I deep
discharged the batteries quickly. 2 banks went green
and 2 stayed on second red LED. Let every thing cool
down (off) and charged up next day, all went green
about same time.

It is mounted under the bed and protected from taking
a hit, but is rather open to elements. Stored and
charged in the barn, no heat. Seems pretty solid.

I am not a battery or charger expert by any means.
And reading all that comes across this forum about the
subject really leaves me feeling a bit stupid. But,
the Dual Pro sales VP and engineer are stopping out to
my place next week to view the application. Anybody
want to suggest some intelligent questions I could put
to them?

BTW, I have been using the Minn Kota version for a
couple of years with good results.

Later,

Jeff M


--- David Hrivnak <[email protected]> wrote:

> Does anyone have experience with the Dual Pro marine
> chargers? I was looking for some sealed chargers I
> can use on my conversion that can be mounted where
> they might be exposed to heat and rain. They charge
> each battery separately so you do not need to
> balance batteries. Thank you.
>
> Ps I did check the EV album list and either this is
> a new charging system or not a good one as oly one
> person listed it.
>


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Discussion Starter #3
Thanks Jeff one question I would ask is if there is any problem leaving. It plugged in for a few weeks? What if one accidentally left on vacation for two weeks could you fry the batteries? A second question would be in a hybrid conversion can they be mounted under the hood where temperatues could reach 200?

-----Original Message-----
From: Jeff Major <[email protected]>
Sent: Tuesday, November 06, 2007 3:56 PM
To: Electric Vehicle Discussion List <[email protected]>
Subject: Re: [EVDL] Dual Pro


Hi David,

I have been testing a 4 bank Dual Pro on an old
version of a 48 volt IUV that I use around the
homestead. Seems to work pretty well. Had it for
about 4 or 5 months. Charge about 1 or 2 times a
week. I thought there might be an issue when I deep
discharged the batteries quickly. 2 banks went green
and 2 stayed on second red LED. Let every thing cool
down (off) and charged up next day, all went green
about same time.

It is mounted under the bed and protected from taking
a hit, but is rather open to elements. Stored and
charged in the barn, no heat. Seems pretty solid.

I am not a battery or charger expert by any means.
And reading all that comes across this forum about the
subject really leaves me feeling a bit stupid. But,
the Dual Pro sales VP and engineer are stopping out to
my place next week to view the application. Anybody
want to suggest some intelligent questions I could put
to them?

BTW, I have been using the Minn Kota version for a
couple of years with good results.

Later,

Jeff M


--- David Hrivnak <[email protected]> wrote:

> Does anyone have experience with the Dual Pro marine
> chargers? I was looking for some sealed chargers I
> can use on my conversion that can be mounted where
> they might be exposed to heat and rain. They charge
> each battery separately so you do not need to
> balance batteries. Thank you.
>
> Ps I did check the EV album list and either this is
> a new charging system or not a good one as oly one
> person listed it.
>


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Discussion Starter #4
Hi David,

The salesman I deal with over the phone says the
charger shuts off when complete. Then will turn on
again if the voltage falls below XX.X volts on the
battery. He claims no problem with leaving them on
for long periods. I do not see any temperature range
listed in the manual. They do have a temp sensor for
each charge lead located near where the cord splits
for pos and neg terminals. This should compensate for
different battery temperatures. I'll ask the guys if
they actually show up.

Jeff M



--- David Hrivnak <[email protected]> wrote:

> Thanks Jeff one question I would ask is if there is
> any problem leaving. It plugged in for a few weeks?
> What if one accidentally left on vacation for two
> weeks could you fry the batteries? A second
> question would be in a hybrid conversion can they be
> mounted under the hood where temperatues could reach
> 200?
>
> -----Original Message-----
> From: Jeff Major <[email protected]>
> Sent: Tuesday, November 06, 2007 3:56 PM
> To: Electric Vehicle Discussion List
> <[email protected]>
> Subject: Re: [EVDL] Dual Pro
>
>
> Hi David,
>
> I have been testing a 4 bank Dual Pro on an old
> version of a 48 volt IUV that I use around the
> homestead. Seems to work pretty well. Had it for
> about 4 or 5 months. Charge about 1 or 2 times a
> week. I thought there might be an issue when I deep
> discharged the batteries quickly. 2 banks went
> green
> and 2 stayed on second red LED. Let every thing
> cool
> down (off) and charged up next day, all went green
> about same time.
>
> It is mounted under the bed and protected from
> taking
> a hit, but is rather open to elements. Stored and
> charged in the barn, no heat. Seems pretty solid.
>
> I am not a battery or charger expert by any means.
> And reading all that comes across this forum about
> the
> subject really leaves me feeling a bit stupid. But,
> the Dual Pro sales VP and engineer are stopping out
> to
> my place next week to view the application. Anybody
> want to suggest some intelligent questions I could
> put
> to them?
>
> BTW, I have been using the Minn Kota version for a
> couple of years with good results.
>
> Later,
>
> Jeff M
>
>
>
--- David Hrivnak <[email protected]> wrote:
>
> > Does anyone have experience with the Dual Pro
> marine
> > chargers? I was looking for some sealed chargers
> I
> > can use on my conversion that can be mounted where
> > they might be exposed to heat and rain. They
> charge
> > each battery separately so you do not need to
> > balance batteries. Thank you.
> >
> > Ps I did check the EV album list and either this
> is
> > a new charging system or not a good one as oly one
> > person listed it.
> >


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Discussion Starter #5
David and All,
I remember Bruce Parmenter tried these, wasn't happy with them, and might have had a failure. A Google search on him and Dual Pro gave me numerous hits like:
http://brucedp.150m.com/blazer/
BB

>Date: Tue, 6 Nov 2007 12:56:23 -0800 (PST)
>From: Jeff Major
>
>Hi David,
>
>I have been testing a 4 bank Dual Pro on an old
>version of a 48 volt IUV that I use around the
>homestead. Seems to work pretty well. Had it for
>about 4 or 5 months. Charge about 1 or 2 times a
>week. I thought there might be an issue when I deep
>discharged the batteries quickly. 2 banks went green
>and 2 stayed on second red LED. Let every thing cool
>down (off) and charged up next day, all went green
>about same time.
>
>It is mounted under the bed and protected from taking
>a hit, but is rather open to elements. Stored and
>charged in the barn, no heat. Seems pretty solid.
>
>I am not a battery or charger expert by any means.
>And reading all that comes across this forum about the
>subject really leaves me feeling a bit stupid. But,
>the Dual Pro sales VP and engineer are stopping out to
>my place next week to view the application. Anybody
>want to suggest some intelligent questions I could put
>to them?
>
>BTW, I have been using the Minn Kota version for a
>couple of years with good results.
>
>Later,
>
>Jeff M
>
>
>--- David Hrivnak wrote:
>
>> Does anyone have experience with the Dual Pro marine
>> chargers? I was looking for some sealed chargers I
>> can use on my conversion that can be mounted where
>> they might be exposed to heat and rain. They charge
>> each battery separately so you do not need to
>> balance batteries. Thank you.
>>
>> Ps I did check the EV album list and either this is
>> a new charging system or not a good one as oly one
>> person listed it.

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Discussion Starter #6
[EVDL] Dual pro

I would be carefull with a dual pro charger if you are goingto charge daily.
Their Absorption voltage is up over 15 volts for a 12 volt battery and then
when the current drops to a low of around 2 amps they do shup off. Lots of
gassing on a flooded battery, I have done more testing then you can imagine.
Mark Grasser



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End of EV Digest, Vol 4, Issue 17
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Discussion Starter #7
Re: [EVDL] Dual pro

Hi Mark,

Any info you can share would be greatly appreciated.
I just ran a test last night and never saw above 14.9
volts. They say they can set things however you want.
I have just been using standard units.

Thanks,

Jeff M




--- Mark Grasser <[email protected]> wrote:

> I would be carefull with a dual pro charger if you
> are goingto charge daily.
> Their Absorption voltage is up over 15 volts for a
> 12 volt battery and then
> when the current drops to a low of around 2 amps
> they do shup off. Lots of
> gassing on a flooded battery, I have done more
> testing then you can imagine.
> Mark Grasser
>


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