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View Full Version : JimN what is your take?


BriEOD
03-02-2005, 12:15 PM
I'm thinking about adding a second battery. I'm upgrading the stereo and putting in 2 amps. Looking over things I don't think I'll be drawing enough to warrant enough to upgrade the alternator and I'm not looking to spend a fortune either. I've read three different threads so far. The best idea I saw was Diesel's with the relay (aka the collapsing circuit in the bomb world) but that also costs the most. I'll be doing it myself and have no problem working with electricity, although I'm not an EE. I'm curious what your opinion is on this if you don't mind sharing. Thanks.

NatesGr8
03-02-2005, 12:22 PM
I would go with a capacitor, they sell these at almost all car stereo stores. A few can be found here (http://www.crutchfield.com/S-q7pbqwPjEtG/cgi-bin/ProdGroup.asp?g=725&avf=N)

A capacitor stores electricity and then uses it when the sytem is under high demand.

BriEOD
03-02-2005, 12:42 PM
Thanks Nate I know what it is. But I don't think I need one. I am more concerned with being conservative with my DC power so I can start the engine after an hour or two of swimming and listening to the stereo at a reasonable level. I'll have a >1 yr old on the boat so I won't be playing the stereo at Kiss concert level decibels.

Leroy
03-02-2005, 01:19 PM
I'm not jimn...but, I think the perko switch and second battery is pretty inexpensive and solid solution, but you still need to remember to move the switch around. With 1 yr old around you could use a little insurance. With an automatic relay then you think about nothing and your starting battery is always ok.

BriEOD
03-02-2005, 01:25 PM
Here is the post Diesel had about the relay:
http://www.tmcowners.com/teamtalk/showthread.php?t=1322

I'm probably leaning toward just having a back up and a switch. But, I figured I'd see what everyones take is. Jim usually has a good pulse on these things.

BriEOD
03-02-2005, 01:29 PM
[QUOTE=Leroy]I'm not jimn...QUOTE]

Are you sure? :confused: No one seems to know who "JimN" is. Maybe it is you and you don't know it! :uglyhamme

86PowerSlot190MC
03-02-2005, 03:28 PM
Here is the post Diesel had about the relay:
http://www.tmcowners.com/teamtalk/showthread.php?t=1322

I'm probably leaning toward just having a back up and a switch. But, I figured I'd see what everyones take is. Jim usually has a good pulse on these things.


Iím going with a battery combiner that will charge both batteries when the engine is running. Iím going to make Bank one the House battery and Bank two the Cranking battery by using three battery isolation switches. This is so my girlfriend doesnít switch the four position type switches to the wrong position and drain both batteries!!!! Basically Iíll hide the emergency combiner switch so she canít switch it accidentally!!!

I know this may be a little more $$$ but I figure itís worth every penny, if it saves my *** later down the line!!

Hereís a link to West Marine, they have a nice little 50 AMP combiner.
http://www.westmarine.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&langId=-1&catalogId=10001&classNum=12106&subdeptNum=544&storeNum=9&productId=5461
Hereís some nice instruction on how they work. These instructions include both the three switch method and the four position switch method of installation.
http://www.yandina.com/acrobats/C50Data.pdf


Hope this info is helpful.

BriEOD
03-02-2005, 03:52 PM
What do you figure it will cost to do that 86?

86PowerSlot190MC
03-02-2005, 06:56 PM
What do you figure it will cost to do that 86?

3 x Battery Switch, Mini - Removable Key $25.99 each
1 x Battery Combiner - Cont. Rating 50A $79.99 each
1 x Battery - 12V Dual Purpose, 12.5"L x $77.99 each
6.75"W x 9.88"H
6 x Battery Cable - 4GA, Red, per Foot $3.19 per foot
3 x Battery Cable - 4GA, Black, per foot $3.19 per foot
4 x Heavy Duty Lug - 4/0 GA., 3/8", 2 pk $9.49 each

I think thatís it?? :eek3:

the prices are based on West Marine catalog!!! You may be able to get this cheaper elsewhere.

MarkP
03-02-2005, 06:59 PM
Well now.. That sums it up.:popcorn:

milkmania
03-02-2005, 07:01 PM
I'll have a >1 yr old on the boat so I won't be playing the stereo at Kiss concert level decibels.


that's lullaby music for my kidz!!!!!:headbang:

86PowerSlot190MC
03-02-2005, 07:05 PM
1 x 300A Compact Battery Switch - Off/1/Both/2, Alt. Field Disc. $39.99 each
1 x Battery Combiner - Cont. Rating 50A $79.99 each
1 x Battery - 12V Dual Purpose, 12.5"L x $77.99 each
6.75"W x 9.88"H
6 x Battery Cable - 4GA, Red, per Foot $3.19 per foot
3 x Battery Cable - 4GA, Black, per foot $3.19 per foot
4 x Heavy Duty Lug - 4/0 GA., 3/8", 2 pk $9.49 each

Price comes down if you buy the four position switch.

Leroy
03-02-2005, 07:13 PM
I don't know BriEOD, looking like a lot of work and stuff hanging all over your boat. Have you thought about just a set of jumper cables and should already have a loud whistle on board. People in SC are nice enough.8p

Footin
03-02-2005, 08:21 PM
I was thinking the same thing, but buying one of those 49.99 jumper boxes.