I would like AC power inside my cruiser

Discussion in 'OnBoard Electronics & Controls' started by the brain, Jan 14, 2017.

  1. Barry
    Joined: Mar 2002
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    Barry Senior Member

    This can make it confusing of course as the chemically balanced equation for a cell is 2.1, which makes a 12 volt battery 12.6.

    But many threads discuss charge voltage and we have seen comments that a fully charged battery can be as high as 13.8 volts and continue the confusion.

    The smart chargers will bulk absorb, top and then float but often the float charge will be in the 13 volts range, ie 2.2-2.3 volts per cell.

    There is an excellent site "Battery University" that goes into a lot of detail on batteries. I could not find the actual equation that shows the balanced equation of 2.1 volts per cell. Last time I had seen this was 1970 in a chemistry class and university
     
  2. the brain
    Joined: Sep 2016
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    the brain Senior Member

    are plastic battery boxes designed to contain a exploded battery?
     

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  3. the brain
    Joined: Sep 2016
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    Location: AL

    the brain Senior Member

    images of planned generater install.

    probablley start using gen straped to rear deck
     

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  4. Barry
    Joined: Mar 2002
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    Barry Senior Member

    Brain

    With the utmost seriousness, this is the absolute worst place with the exception of putting it in your cabin that you could place this gen set. The exhaust will probably kill you.
    The exhaust exists and the CO will fall into the bilge. Even the gases coming out and mixing in the air which you breath will can cause death.

    Even if you close the back door when you are using the gen, the backdraft will bring these gasses into your cabin area.,

    Its like playing Russian roulette by yourself
     
  5. the brain
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    the brain Senior Member

    yes you are correct the fumes are dangerous when I initially used it on the rear deck it stunkup the area quickly.

    I've already covered the opening under window. so Yamaha will run on dive deck or roof or on closed bow

    are plastic battery boxes designed to contain a exploded battery?
     
  6. Barry
    Joined: Mar 2002
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    Barry Senior Member

    I would expect that none of the plastic battery box manufacturers would suggest that their boxes would contain a battery explosion in their boxes due to liability issues.

    The explosion is violent though. In the 70's, I worked summers at a machine/welding shop and a guy took the ginpole trucks battery out, took the caps off to fill with some water, and put it on a charger. Half hour later one of the welders began to grind a weld and the battery exploded. There were bakelite pieces strewn maybe 10 feet and battery acid everywhere.

    Any flooded cell, open to atmosphere battery produces explosive hydrogen gas when it is charging and they need to be watered as part of the charging process.
    AGM, valve regulated, gel, any sealed batteries do not produce hydrogen that vents overboard unless a certain pressure exists. Ie overcharging can cause this situation. See note about venting of ALL batteries below

    ABYC specifically states:

    1) E-10.7.2 A provision shall be made to contain incidental leakage and spillage of electrolyte. Hence plastic battery boxes

    2) E-107.7 1, 2 3, Will provide that metal objects cannot come in contact with the ungrounded post a solution being a cover, boot or non conductive shield. Hence the top of the plastic battery box

    3) E-10.7.9 A vent system will be provided to permit the discharge FROM THE BOAT of hydrogen gas released by the battery. NOTE, this does not mean into the bilge of the boat, but out of the boat over the side.
    And all batteries, AGM, sealed, valve regulated, gel, flooded require this treatment.

    4) E-10.7.10 Battery boxes whose cover forms a pocket over the battery shall be vented at the uppermost portion of the cover. (overboard)
     
  7. sdowney717
    Joined: Nov 2010
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    Location: Newport News VA

    sdowney717 Senior Member

    Bolt on a shelf on the exterior transom to the side of the motor and mount it there with straps.
    Take it into the boat when driving.

    Advantage, gen is out of the way, gen is exhausting outside of the boat. May even be quieter.

    Might even make a vinyl cover to protect from splashing when underway so you could leave it mounted outside of the boat.

    Disadvantage, rough water would get it wet.

    Slipmate with sailboat had a Honda gen like that and he would run it on the aft deck.

    I wonder if you could run yours on a forward deck, would the exhaust then be blocked from entering the cabin?
     
  8. Scot McPherson
    Joined: Jan 2017
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    Location: New England

    Scot McPherson Senior Member

    Battery boxes are designed to vent fumes, while containing leaked acid. That's it, if a Battery gets to the point of explosion, you haven't been doing to part to check the health of the battery. Most modern battery chargers (you need to do your homework here)can detect faults even in a single cell of a battery bank, and you _should_ check the batteries before starting your engines. Alternators put out 14.6volts which can cause a faulty battery to heat up fast enough to burst it. All I do before starting my engine is cycle off the charger, and cycle it back on so it does a new battery check.
     
  9. Barry
    Joined: Mar 2002
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    Barry Senior Member

    Most of the standard black plastic battery boxes do not meet ABYC standards. as per the post #51 above. ie uppermost vent over the side of the boat. Small point and I do not recall many properly built battery boxes. Our own boat with 11 batteries, a boat built in 2008, does not have compliant boxes.
     

  10. the brain
    Joined: Sep 2016
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    the brain Senior Member

    OK first off Thanks for explaining about the battery/box

    I have a battery charger that came w/ the donor bass boat this Guy had two batteries starting and deep cycle.
    http://www.cabelas.com/product/Cabe...-On-Board-Marine-Battery-Chargers/1309718.uts

    I have used it a couple of times to recharge my cars battery it has a charge light then after charge the condition light comes on I haven't sean a cell analizing light yet.

    I think the dive plateform is the safest place to run the generater

    can I get away w/ running a thick extension cord under gunwale into cabin?

    would like to see a few images of how you Guys run wires.
    Thanks again STB
     
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