12v Battery voltage regulation

Discussion in 'OnBoard Electronics & Controls' started by alan_jeans, Aug 6, 2007.

  1. alan_jeans
    Joined: Aug 2007
    Posts: 3
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    Location: Scotland

    alan_jeans New Member

    I have a 12 V battery (Golf trolley type) connected to my switch panel for my 19ft yacht. I will use it to power 2 DC sockets for GPS\VHF\Phone charging etc, a depth sounder and a compass light, and also to run 12V LED lights for navigation and interior lighting. I have been advised to limit the voltage to 12V on the battery output to protect the LEDs, but all the voltage regulators will drop a couple of volts. Can I get a regulated 12V supply from a 12V battery?
     
  2. Frosty

    Frosty Previous Member

    I have led's for pump monitors etc and even some I made myself with the appropriate resistors. I have constant automatic battery chargers.

    I have never even thought about regulating the 12 volts, with engines running or not.

    Im not an electronics expert but perhaps your being over causious
     
  3. alan_jeans
    Joined: Aug 2007
    Posts: 3
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    Location: Scotland

    alan_jeans New Member

    To be honest, I hadn't thought about it before putting my switchboard together, but then I read that putting a higher voltage through leds could reduce their lifetime dramatically.
     
  4. lazeyjack

    lazeyjack Guest

    nope you take a car , the charge voltage, goes 14 vdc, I often charge my banks to 34 vdc, on my 24 vdc system to even them out, this is recommended by the battery makers
    Your 12 volt batt should sit above 12.6 all the time, 12 and lower will eventually , and surely kill it:))
     

  5. alan_jeans
    Joined: Aug 2007
    Posts: 3
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    Location: Scotland

    alan_jeans New Member

    The battery is sitting fully charged at about 13.8V and this gets closer to 12 when it discharges. I will be topping it up with a small solar charger, but I think that the voltage will drop if I do a week long trip. If I put in a voltage regulator to keep the output voltage to 12V, as the battery drains, the output voltage will fall below 12V, or the regulator might not work at all.
     
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