12 LEDs on 120 volt system

hemmjo
hemmjo Solar Expert Posts: 90 ✭✭
in Off Grid Solar & Battery Systems #1
I am installing another system in the Dominican Republic for the mission I work with. http://villagemountainmission.org/

The panels, controls, 12 v battery bank and 1kw inverter will be in one building, supplying power that one and to another about 100 feet away. We are running 10ga wire between the two to supply about 7 amps of 120VAC to the remote building.

We have some 12v LED area lights, about 2 watts each. We want to have less than 6 in this building. I am thinking I need a 120vac to 12vdc adapter, I find a lot of them online, but many have poor user ratings.

Does anyone have a recommendation for a good one to use. I don't need more than 12 watts so a 20 watt one should be plenty.

Any other options to consider?

Thanks,

John
Two systems in the Dominican Republic  http://villagemountainmission.org/
installed Feb 2014 at 19.796189° -70.893594°, Classic 150 + WBJR, KISAE SW1210, MN Battery Monitor, IOTA DLS 55/IQ4,  4- Solar World 275w, 4-6v x 225ah Trace Batteries
installed Feb 2015 at 19.795733° -70.893372°, same components  as above
Honda PowerMate PC0497000, 7000/8750w generator - powers the well and chargers maybe once a week






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  • gww1
    gww1 Solar Expert Posts: 963 ✭✭
    #2
    Re: 12 LEDs on 120 volt system

    How about a simple wall wart like is on a computer or phone etc?
    gww
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  • hemmjo
    hemmjo Solar Expert Posts: 90 ✭✭
    #3
    Re: 12 LEDs on 120 volt system

    I was thinking of that, I do have some of those just lying around from old things.
    Two systems in the Dominican Republic  http://villagemountainmission.org/
    installed Feb 2014 at 19.796189° -70.893594°, Classic 150 + WBJR, KISAE SW1210, MN Battery Monitor, IOTA DLS 55/IQ4,  4- Solar World 275w, 4-6v x 225ah Trace Batteries
    installed Feb 2015 at 19.795733° -70.893372°, same components  as above
    Honda PowerMate PC0497000, 7000/8750w generator - powers the well and chargers maybe once a week






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  • waynefromnscanada
    waynefromnscanada Solar Expert Posts: 3,009 ✭✭✭✭
    #4
    Re: 12 LEDs on 120 volt system
    hemmjo wrote: »
    I started this thread in another place but did not get much response.

    I am installing another system, similar to the staff one listed below, in the Dominican Republic for the mission I work with. http://villagemountainmission.org/. This one for the kitchen and property caretaker's small home.

    The panels, controls, battery bank and inverter will be in the kitchen, supplying power for lighting there and to the caretakers home about 100 feet away. We are running 10ga wire between the two to supply about 7 amps of 120VAC to the home.

    We have some 12v LED area lights, about 2 watts each. They run direct from the batteries where possible. We will have about than 6 in this building. I need a 120vac to 12vdc adapter, I find a lot of them online, but many have poor user ratings.

    I don't need much more than 12 watts.

    Someone there suggested a wall wart type of supply. I have a few of them from old things, but they are 6-8 watts. I can use multiple adapters, that would require extending the 120 power beyond the planned location to provide power for the lighting. Maybe that is a good idea.

    My concern is idle time current draw. Maybe use multiple small worts and turn them off and on instead of using the switch on the LED?

    Any other options to consider?

    Thanks,

    John

    That's what I would do. Or even one "wort" capable of powering all the LEDs and extend the low voltage lines instead of extending the AC lines to the different "worts".
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