48V to 12V converter?

Seven
Seven Solar Expert Posts: 292 ✭✭
in Solar Beginners Corner #1
Do they make a converter to go from 48v to 12v? I have seen 12 to 24 and 24 to 12. The reason I ask is if I'm running a 48v bank but I still want to run some 12v gear I'd rather not run from my inverter through another inverter to get back to 12.

TIA
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Comments

  • BB.
    BB. Super Moderators, Administrators Posts: 33,683 admin
    #2
    Re: 48V to 12V converter?

    May be "overkill"--but MPPT Solar Charge Controllers can be used to down convert from 48 to 12 volt battery banks...

    A nice one would be the MorningStar 15 amp MPPT solar charge controller.

    Solar Converters also has various units that include 48v to 12v converters (their website seems to have broken links--not sure what is going on).

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • Ralph Day
    Ralph Day Solar Expert Posts: 1,025 ✭✭✭✭
    #3
    Re: 48V to 12V converter?

    I have an Astron model 4812 that does just what you want. The continuous amps out is only 9 amps, so it's not for running a 12 volt fridge, just light loads.\\

    Ralph
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  • System2
    System2 Posts: 6,290 admin
    #4
    Re: 48V to 12V converter?

    Astron model - iso4812-12
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  • Seven
    Seven Solar Expert Posts: 292 ✭✭
    #5
    Re: 48V to 12V converter?

    Thanks guys!

    posttooshort
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #6
    Re: 48V to 12V converter?

    The Telcom industry uses 48v a lot, and electronics houses have lots of 48-12 DC-Dc convertrers, some are very efficient, some are not.
    Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister ,

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  • BB.
    BB. Super Moderators, Administrators Posts: 33,683 admin
    #7
    Re: 48V to 12V converter?

    And, you can find a lot of smaller converters at Digikey.com and such too...

    Are you planning on using a 12 volt battery or just need a down converter (no 12 volt local battery).

    If you use a 12 volt battery for local power--I would choose something that is really a charge controller (with Float setting and temperature compensation).

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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