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Thread: Batteries

  1. #1
    Member fullbush's Avatar
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    Default Batteries

    Boat Batteries have always been a big bugaboo for me. I have been told never start an engine w/ an ECM w/ a deep cycle battery, because there isn't enough voltage and low voltage can fry your ECM. I have two 8D batteries one for my start battery and one for the house. I decided to go w/ a starting battery for the house in case I needed it to start my main in the event my start battery was down. My problem is when I run my house battery down it doesn't wanna come back. Now I'm thinking of going to a deep cycle for the house, but it seems like every deep cycle I've ever had doesn't recover fully either. Is it my battery brand? I use Interstate "workaholics" mainly because thats what Redden Net sells in Cordova. I'm sick of lugging 8D's around every spring! Any thoughts?

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    Do not go to starting battery, the D8 batteries are better batteries for your application. The problem is not your batteries it’s your charging system. Fix your charging systems and you will not have any more battery problem. When I use the word “FIX” I do not mean it is broken, it’s just not big enough.

  3. #3

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    Quote Originally Posted by fullbush View Post
    Boat Batteries have always been a big bugaboo for me. I have been told never start an engine w/ an ECM w/ a deep cycle battery, because there isn't enough voltage and low voltage can fry your ECM. I have two 8D batteries one for my start battery and one for the house. I decided to go w/ a starting battery for the house in case I needed it to start my main in the event my start battery was down. My problem is when I run my house battery down it doesn't wanna come back. Now I'm thinking of going to a deep cycle for the house, but it seems like every deep cycle I've ever had doesn't recover fully either. Is it my battery brand? I use Interstate "workaholics" mainly because thats what Redden Net sells in Cordova. I'm sick of lugging 8D's around every spring! Any thoughts?
    Sounds like bull to me. I used a deep cycle to start all kinds of things with an ecm and they do fine. The low voltage theory is interesting as a 12v deep cycle has the same voltage as a 12v starting battery.....The starting battery has more cranking amps due to the thinner plates, but that only becomes a concern with a huge engine and very cold temperatures as the discharge rate in this condition of a true deep cycle is not as great. In my years of boating and RVing, the best batteries by far to charge and discharge and are bothered little by it all are the 6 volt golf cart type of batteries.

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    Member Maast's Avatar
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    Moose beat me to it,

    You're not getting a full charge; your charging system isnt putting out enough voltage (most likely cause - voltage regulator on alternator is probably bad/underperforming)

    Or like moose said your alternator isnt putting out enough amperage or its putting out too many amps for a deep cycle battery and you're cooking it and boiling off the water (unlikely).

    Most flooded deep cycle batteries should be charged at no more than the "C/8" rate for any sustained period. "C/8" is the battery capacity at the 20-hour rate divided by 8. For a 220 AH battery, this would equal 26 Amps.

    I feel the best bet for house batteries are the 6 volt golf car batteries wired in series to give you 12 volts. They're at Sams club for something like 60 bucks for a 200 AH battery, however two in series doesnt mean 400AH, it means 200AH @ 12volts.
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    Member fullbush's Avatar
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    6 volt golf cart bats huh? hmm I wonder if 3 of em would fit in a Blue Seas 8D batttery box? Thankyou very much I live all summer on the boat and I'm single handedly filling the landfills w/ 8D's
    one more question, How do I wire 6 volt golf cart batteries x 3 into 12 volt? (laymens terms please! remember who you're dealing w/ here

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    Member spoiled one's Avatar
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    Quote Originally Posted by Maast View Post
    I feel the best bet for house batteries are the 6 volt golf car batteries wired in series to give you 12 volts. They're at Sams club for something like 60 bucks for a 200 AH battery, however two in series doesnt mean 400AH, it means 200AH @ 12volts.
    I am not an expert by any means on this subject, but I am smart enough to surround myself with friends that know a thing or two about 12 volt systems. I went through this last spring and ended up going with four 6 volt GC 2 AGMs in series and parallel. They are quite a bit more expensive than the costco or sams GC 2's, but I have them installed in the cabin and was a bit concerned with "off gassing". (Not by me, but the batteries) No complaints or regrets.
    Spending my kids' inheritance with them, one adventure at a time.

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    I bought some of those Sears AGM Platimun batteries. Supposed to be both a starting and deep cycle. Last spring when I pulled my Sea Sport out of storage put the charger on the batteries and they were at 95% after sitting unused for 7 months. They also "cured" my problem with my fancy depth finder, which come to find out, will give eratic results with anything other than a specific voltage.
    Pricey but worth every penny.

    Interstates are about the worst battery around. Had a friend working at a parts store a few years back and he told me they were the most returned battery, believe it or not, followed by the Optimas
    Tennessee

  8. #8

    Default 12 Volt +

    Voltage meter on a 12v DC fully charged battery better read 13.1 or higher any thing below 11 and it's shot.
    A plug in battery charger that pulsates, that is slams the battery with more AMPS will tend to clean and keep clean the lead plates. I just put on starting circuit 10 or so times and then let it charge a 2 amps.
    Also dirty battery tops will draw current thru the dirt and drain them over time.
    Learned from a ex navy submarime battery tech

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    Member f0zzy2's Avatar
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    Thumbs up odyssey batteries, these look like the ticket

    http://www.odysseybatteries.com/

    Do a search there was a pretty good thread about them a few months back

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    Quote Originally Posted by fullbush View Post
    6 volt golf cart bats huh? hmm I wonder if 3 of em would fit in a Blue Seas 8D batttery box? Thankyou very much I live all summer on the boat and I'm single handedly filling the landfills w/ 8D's
    one more question, How do I wire 6 volt golf cart batteries x 3 into 12 volt? (laymens terms please! remember who you're dealing w/ here

    You can't use there. If they are in series, you add the voltage. (6v + 6v = 12v) When Spoiled on said he had four, he really had two pairs in series. When they are in parallel, the voltage stays the same. Hopefully I am making sense.
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    Member spoiled one's Avatar
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    Guess I should have spent more time behind the keyboard expanding on the old series, parallel process. I ran two 6 volts together in series to make 12 volts and then wired the two 12 volt banks in parallel to form one big 12 volt bank. I think I got that right.

    On a side note, I am also replacing all my halogen bulbs in the cabin with LED's to help decrease the amp draw. I just installed a pair of LED flood lights and the draw only 1.1 amps for the pair and they produce A LOT of light. Now if I could only improve the efficiency of my outboards!
    Spending my kids' inheritance with them, one adventure at a time.

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    Excellent info! Those Odyssey batteries look good if there was a local dealer i'd look into them. I do have a voltage gauge and an amp gauge. I run twin engines and the port engine wouldn't charge, it was a night mare to trouble shoot I put the stbd alternator on and it still wouldn't charge it drove me nuts! everything was brand new, so I scratched the paint off where the ground connected to the engine and viola it charged at 14.1. The stbd was only charging 13.5 so I scratched all the paint off that ground and it jumped up to to 14.1, it tickled me they really paint the heck put of marine engines now days BTW
    Anyway I'm gonna go w/ the 2 golf cart bats like spoiled one and jrogers suggested, for my house battery. For some reason since I blew an ecm and the code that came up "low voltage" and since then I'm all freaked out about my starting battery so I keep the hottest battery known to man just for starting the boat and its isolated completely from the house battery
    Had to edit cause the main reason I was making this post is my Norcold refrigerator. I can't live w/ it and it literally kills me it draws like 3 amps

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    I know Trojan batteries are also very good. I've had great luck with them. Check out their website. I think Alaska Battery carries them as well.

    Also, I know most the renewable energy places here in town are pushing exide batteries. These are what they like to pair up with their solar panels and wind generators. I don't have much experience with them but thought I'd throw that out there.

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    The other thing to keep in mind if you have battery problems is that they are completely charged for the winter if they stay in the boat. (Does anyone really pull out those 8D batteries??) If they don't have a full charge, the fluid will freeze when it gets cold and bend the plates so they will not work well after that. I top mine off every month or so in the winter.
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  15. #15

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    [QUOTE=fullbush;716120]Excellent info! Those Odyssey batteries look good if there was a local dealer i'd look into them.

    Batteries Plus in Anchorage carries them.

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    Default Odyssey BAtteries

    I have four PC2150 Odysseys that I use.(boat and camper) Nothing but good to say about them. Mine are about 4.5 years old. The first 2.5 years of their life was in a commercial use vehicle. They were still at full capacity, so I put two of them in my boat to try them out. Cant believe how well they work still. They are very proud of them though.I think about $300. I will run all of my electronics, radio, wallas heater, lights, water pump ect. while on the hook in the evening, and in the am they have hardly budged.

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    Member fullbush's Avatar
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    Quote Originally Posted by Soundfisher View Post
    I have four PC2150 Odysseys that I use.(boat and camper) Nothing but good to say about them. Mine are about 4.5 years old. The first 2.5 years of their life was in a commercial use vehicle. They were still at full capacity, so I put two of them in my boat to try them out. Cant believe how well they work still. They are very proud of them though.I think about $300. I will run all of my electronics, radio, wallas heater, lights, water pump ect. while on the hook in the evening, and in the am they have hardly budged.
    Well its settled Odysseys for me!
    Jrogers I put 8D's in when I built it last year and noticed immediately they were low on water. I made the mistake of putting regular water and not distilled water in them . Live and learn the expensive way.

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    I really like the Odyssey Batteries if you read the spec you will find the PC 2150 battery may not have enough reserve power for a house boat and if you deep cycle a PC 2150 the recommended charge current is 35 amps if I remember correctly. Most outboards will not let you charge a battery at 35+ amps; If you do not care about long turn battery life then it not a problem.

    I also think the golf cart batteries are a better choice for a house and starting battery, take a look at Interstate Batteries U2200. There are also other brands of golf cart batteries if you don’t like Interstate, just make sure it a golf cart type batteries.

    I feel sorry for the battery manufacture because they get blame for problems caused by boat builders not designing a proper charging system for the drain put on the batteries. A friend is rebuilding a battery system on a $300,000 + boat because the boat builder did not know what he was doing. So if your “ONLY” $50,000 or $80,000 boat is having battery problems you also may have problems with the battery system because of poor design.

  19. #19
    Member f0zzy2's Avatar
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    Default ODYSSEY Batts,

    If you do go with the odyssey's make sure to get one's in the BCI Group. The PC are not rated for a petroleum vapor area. I found this out the hard way. Which was no problem. After i found a few cracks in the casing they upgraded me from the pc1200 series to the 34M-PC1500 and two day air'd them to me at no charge. great company!

  20. #20
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    Default odessey

    If you are pricing these out you should also check alaska battery specialists...

    I saved 50$ on the odessey for my Harley from the other store in town...these are sposed to be the schnizzel of batteries.......

    next year should tell.....I always have to replace my harley battery every spring.......

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