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Thread: 12V cabin lighting.

  1. #1
    BillB Guest

    Default 12V cabin lighting.

    I'm trying to set up a small 12V lighting system in an off-grid cabin. I want to have 3 or 4 LCD ceiling lights that will be used only 3 or 4 hours a day, 3 days a week during the summer. What I need to know is what wiring I use and if there is any other equipment I'll need (e.g. Low Voltage Disconnect?). Do I just connect the wiring from battery to the can normally? Thanks, Bill

    Clarification: I'm going to solar charge the battery by itself (not enough sun near the cabin). I just need to know what goes between the battery and the LED lights.
    Last edited by BillB; August 26th, 2010 at 15:03 PDT.

  2. #2

    Default Re: 12V cabin lighting.

    Voltage drop is a real issue with this sort of thing so ...
    http://forum.solar-electric.com/showthread.php?t=29

    (Voltage drop calculator.)

    I think you mean LED lights, not LCD.

    Fused circuit connected to the battery is fine. You could come off LVD terminals on a charge controller (if so equipped) but it isn't really necessary.
    1220 Watts of PV, OB MX60, 232 Amp hrs, OB 3524, Honda eu2000.

    Ohm's Law: Amps = Volts / Ohms
    Power Formula: Watts = Volts * Amps

  3. #3
    Join Date
    Sep 2006
    Location
    Willits, CA
    Posts
    5,619

    Default Re: 12V cabin lighting.

    Keep in mind, 1w of LED @ 12V is 1 amp, so size your wire accordingly.

    Check the manual for your charge controller, but 5-6A should be within the range of many controllers LVD's.

    1 LED fixture per ordinary household light switch is likely OK, but 5 or 6 amps worth, and the DC arc may wear them out early.

  4. #4
    BillB Guest

    Default Re: 12V cabin lighting.

    I did mean LED. Thanks. Where would I get a charge controller?

  5. #5

    Default Re: 12V cabin lighting.

    Quote Originally Posted by BillB View Post
    I did mean LED. Thanks. Where would I get a charge controller?
    A good starting place would be the forum host, NAWS:

    http://store.solar-electric.com/chco.html

    1220 Watts of PV, OB MX60, 232 Amp hrs, OB 3524, Honda eu2000.

    Ohm's Law: Amps = Volts / Ohms
    Power Formula: Watts = Volts * Amps

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