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What type of batteries should I use


raider840

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I currently have one battery and I want to add a second. Should I use 2 cranking batteriers or 2 deep cycle batteries or one of each type?

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First you need to pick the type of battery, flooded battery (standard and comes with your bu) or upgrade to AGM battery.

NOTE: DO NOT MIX THESE BATTERIES ON THE SAME BOAT! Use all flooded or all AGM.

I use an Optima Blue Top AGM marine starting battery (obviously for starting) and I have two Deka AGM 100 amp hour batteries for the stereo (I have 4 amps pushing over 2000 watts).

I have Blue Sea perko switch that turn them both on but keeps them separated (switch has settings for OFF, ON or BOTH settings not the 1 or 2 or BOTH like the one that came with my boat). Also I have the blue sea charge relay that only lets the starting battery charge from the alternator when running. Only when the starting battery is full will it combine both banks automatically and charge all 3 batteries off the alternator. I always charge the batteries with my promariner 20 amp charger that charges each bank separately when the boat is in storage.

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First you need to pick the type of battery, flooded battery (standard and comes with your bu) or upgrade to AGM battery.

NOTE: DO NOT MIX THESE BATTERIES ON THE SAME BOAT! Use all flooded or all AGM.

I use an Optima Blue Top AGM marine starting battery (obviously for starting) and I have two Deka AGM 100 amp hour batteries for the stereo (I have 4 amps pushing over 2000 watts).

I have Blue Sea perko switch that turn them both on but keeps them separated (switch has settings for OFF, ON or BOTH settings not the 1 or 2 or BOTH like the one that came with my boat). Also I have the blue sea charge relay that only lets the starting battery charge from the alternator when running. Only when the starting battery is full will it combine both banks automatically and charge all 3 batteries off the alternator. I always charge the batteries with my promariner 20 amp charger that charges each bank separately when the boat is in storage.

Asking a dumb questions, but what is the difference between a "flooded and AGM"?
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The flooded battery is your common LEAD/ACID battery. They vent fumes and the fumes are corrosive. Get an AGM or GEL battery. They are sealed units. I have had great luck with the Deka batteries for years now. And not just in boats. They are spendy but worth it IMO.

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First you need to pick the type of battery, flooded battery (standard and comes with your bu) or upgrade to AGM battery.

NOTE: DO NOT MIX THESE BATTERIES ON THE SAME BOAT! Use all flooded or all AGM.

I use an Optima Blue Top AGM marine starting battery (obviously for starting) and I have two Deka AGM 100 amp hour batteries for the stereo (I have 4 amps pushing over 2000 watts).

I have Blue Sea perko switch that turn them both on but keeps them separated (switch has settings for OFF, ON or BOTH settings not the 1 or 2 or BOTH like the one that came with my boat). Also I have the blue sea charge relay that only lets the starting battery charge from the alternator when running. Only when the starting battery is full will it combine both banks automatically and charge all 3 batteries off the alternator. I always charge the batteries with my promariner 20 amp charger that charges each bank separately when the boat is in storage.

This is spot on I just use the cheeper flood batteries. I did my home work on this and for the money the best I could find was the Interstate SRM-29.

http://www.interstatebatteries.com/cs_estore/Content.aspx?dsNav=Ntk~SearchGroup|RVDeepCycle|3|

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