[C38] Some Good Information
Larry Malmberg
larrypi at linkline.com
Wed Nov 28 13:06:35 EST 2007
We have been exploring batteries, always a concern for all of us. One
manufacture's engineer offered us the following information, this may be
useful to the group so I'm passing it on.
The Basics of FLOODED batteries:
BENEFITS
1) Lower Cost. Cost about 50% of any sealed battery type of equal size
(AGM, Gel)
2) Long Life, very robust. Typically lasts 33-50% longer than any sealed
battery type of equal size (AGM, Gel)
3) Longer runtimes. (mileage). Typically provides 10-20% more capacity than
any sealed battery type of equal size (AGM, Gel)
4) Can be charged with any standard automotive type battery charger
4) Performs well in ALL cycling applications (light, moderate AND deep
cycling)
5) Can be charged with alternators
DRAWBACKS
1) Maintenance (monthly watering needed)
2) Messy (requires cleaning)
3) Corrosion. (Connections require cleaning)
4) Spillable. Flooded batteries must be mounted upright
5) Battery produces gasses (Hydrogen is generated while charging)
6) Can freeze in extremely cold Temperature's causing permanent damage.
DRAWS
1) Charges at the same rate as any sealed battery type (AGM, Gel)
The Basics of GEL batteries:
BENEFITS
1) Maintenance free (no watering needed)
2) Performs well in ALL cycling applications (light, moderate AND deep
cycling)
3) Very, clean and easily movable (not messy, no acid grime on battery top)
4) Clean connections (No corrosion on terminals)
4) GEL batteries can be mounted on their sides with no loss in performance
5) Battery does not produce any gasses
6) Can survive extremely cold Temperature's
DRAWBACKS
1) Higher Cost. Cost between 1.5 - 2.0 times more than a flooded battery of
equal size
2) Reduced runtime (mileage). 80-90% runtime of a flooded battery of equal
size
3) Reduced Life. 50 -75 % lifetime of a flooded battery of equal size
4) Requires a charger with an GEL setting/profile (aka SEALED, VRLA) or it
can be dead in a few weeks.
5) Cannot be charged by most alternators.
DRAWS
1) Charges at the same rate as both flooded and AGM battery types.
The Basics of AGM batteries:
BENEFITS
1) Low Maintenance (no watering needed)
2) Non-spillable. AGM batteries can be mounted on their sides with no loss
in performance
3) Very, clean and easily movable (not messy, no acid grime on battery top)
4) Clean connections (No corrosion on terminals)
4) Battery does not produce any gasses
5) Can be charged with most alternators
6) Can survive extremely cold Temperature's
DRAWBACKS
1) Higher Cost. Cost between 1.5 - 2.0 times more cost of an equal sized
flooded battery
2) Reduced Life. 50 -75 % lifetime of an equal sized flooded battery
3) Reduced runtime. (mileage). 80-90% runtime of an equal sized flooded
battery
4) Requires a charger with an AGM setting/profile (aka SEALED, VRLA) or it
can be dead in a few months.
5) Performs well in light to moderate cycling applications (but poorly in
deep cycling)
DRAWS
1) Charges at the same rate as both flooded and GEL battery types.
Best regards,
Larry Malmberg-President
Larry Malmberg Investigations and Security, Inc.
505 North Arrowhead Avenue - Suite 510
San Bernardino, CA 92401-1200
909-383-8565, 800-655-4549 Facsimile 909-383-8566
PI 15211, PPO 112446
www.larrypi.com
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-----Original Message-----
From: listserve-bounces at catalina38.org
[mailto:listserve-bounces at catalina38.org] On Behalf Of mark turner
Sent: Wednesday, November 28, 2007 7:53 AM
To: Catalina 38 Listserve
Subject: Re: [C38] Fuel tank tech info -- 5M attachments
I have sloping floor and drop leaf counter top. Where does yoos guys floors
slope from. I don't understand why you seem to be having trouble with then.
No one- even complete strangers who have never been on a boat ever has had a
problem.Maybe that is something else that is different.
Mark
----- Original Message -----
From: "Duff, Russ (R.W.)" <rduff at visteon.com>
To: "Catalina 38 Listserve" <listserve at catalina38.org>
Sent: Wednesday, November 28, 2007 3:18 PM
Subject: Re: [C38] Fuel tank tech info -- 5M attachments
> That's what my tank looks like also, and I also have the sloping floor
> and drop-leaf counter top.
>
> Sincerely,
> Russ Duff
> Catalina 38, Hull #112
> "AVANTURA"
> Lake Erie
> Grosse Ile, Michigan
> RDUFF AT VISTEON DOT COM
> AVANTURA AT COMCAST DOT NET
>
> -----Original Message-----
> From: listserve-bounces at catalina38.org
> [mailto:listserve-bounces at catalina38.org] On Behalf Of Charles
> Sent: Wednesday, November 28, 2007 9:32 AM
> To: Catalina 38 Listserve
> Subject: Re: [C38] Fuel tank tech info -- 5M attachments
>
> Wow, Great Discussion!
> Here are some fuel tank pictures for Mighty Quinn, which is a 1981
> boat. This is I think, a big tank and my engine water thru-hull is
> located between the fuel tank and engine. Note how my pictures show the
> tank taking much more space than the ones Les sent. I use the space
> around the tank for additional line and storage of my diving gear (air
> tank is stored in the port lazarette where the CNG tank once was).
> I am a bit surprised there are regulations making it illegal to weld
> on tanks... Large tanker trucks stress and crack all the time and have to
> be repaired. In fact, DOT has regulations regarding inspection and I
> would assume repair. But, things change and some of us apparently
> have to deal with the consequences.
> By the way, I also have the sloping floor which routinely "surprises"
> most folks on the boat (including me!).
>
> Charles Finn
> Mighty Quinn, 1981, #114
>
> mark turner wrote:
>> Hi Phil, The Goose is a 1981 with sloping floor. I have the
>> rectangular under bunk access panel. My fuel tank is shaped like the
>> one in the drawing (goodness knows how I would ever get it out).
>> Can't remember how much it holds except it is more than 18 gals. The
>> brokers advert said 35 gals- i seem to recall it was more like 25.
>>
>> ----- Original Message -----
>> *From:* eyriepg at comcast.net <mailto:eyriepg at comcast.net>
>> *To:* hlhowell at pacbell.net <mailto:hlhowell at pacbell.net> ;
>> Catalina 38 Listserve <mailto:listserve at catalina38.org>
>> *Sent:* Wednesday, October 24, 2007 5:08 PM
>> *Subject:* Re: [C38] Fuel tank tech info -- 5M attachments
>>
>> After comparing Les's photos of his 1982 fuel tank, which looks
>> like the tank drawing in the tech tips part of the C38 web site, I
>> am concluding that this tank could not possibly fit under the
>> quarterberth on my boat. The main problem is the my raw water
>> through hull is in the way. Les's boat also has a larger access
>> hole since his hole follows the chamfered shape of the
>> quarterberth molding where my cutout is rectangular.
>>
>> Now I am wondering if any pre 1982 boats have a larger tank than
>> the 18 gallon one that I have in my boat. I believe that in 1982
>> Catalina made a number of changes to the interior of the C38. The
>> countertop around the sink is shaped differently and a little
>> higher, and the floor is stepped down forward of the galley where
>> the earlier floors slope down (this takes guests by surprise all
>> the time). Any comments by pre 1982 boat owners would be very
>> helpful.
>>
>> Phil Gay
>> C38 049 Que Linda
>> Everett, WA
>>
>>
>> -------------- Original message --------------
>> From: Les <hlhowell at pacbell.net>
>>
>> > Hi, everyone,
>> > Sorry it took me so long to get the photos and get them
>> posted. Please
>> > forgive the dirty appearance of the area near the fuel tank,
>> we haven't
>> > had time to get that cleaned up this year...
>> >
>> > I used a tape measure to help you see the distances. These
>> photos can
>> > be posted if Catalina approves.
>> >
>> > Regards,
>> > Les H
>> > JACE
>> >
>>
>>
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