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Old 03-21-2012, 09:57 AM
Cguse13's Avatar
Cguse13 Cguse13 is offline
TT Regular
Join Date: Jan 2011
Boat: Mastercraft 205 prostar 1996
Location: Central
Posts: 43
Battery iso for dual bat. How big

I run two battery on perko switch wanting to switch over to the lazy mans way but how do I know how many amps I need to purchase. 100, 200, 500 amp switch. Can someone shed light on this.

What I have:

2 blue tops 34s
3 crappy amps.
Ballast puppy
And stock accessory's

96 prostar 205
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Old 03-21-2012, 10:43 AM
bturner2's Avatar
bturner2 bturner2 is offline
MC Maniac
Join Date: Mar 2008
Boat: Maristar 200VRS w/ X2 Package, 2007, 310HP
Location: Brighton, MI
Posts: 3,595
I used the "add a battery" kit from Blue Seas and left it at that. Works great on my 07 X2 with two blue tops and 2 JL Audio amps.
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Old 03-21-2012, 12:03 PM
Lumbergh's Avatar
Lumbergh Lumbergh is offline
MC Fanatic
Join Date: Aug 2011
Boat: 1991 ProStar 190
Location: Seattle
Posts: 806
I bought a Battery Doctor 150A from Amazon, it was about $70. Simple wiring, seems to work good so far.

Probably overkill, but "buy once, cry once".
1991 ProStar / 351W with 1:1 Velvet Drive
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Old 03-21-2012, 12:18 PM
agarabaghi agarabaghi is offline
MC Maniac
Join Date: Mar 2011
Boat: 1994 Mastercraft Prostar 205
Location: Southeast
Posts: 3,106
battery doctor seems to work great for me.

what is the amp rating on your amps? that will give you an idea
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