Low Frequency Transformers

JRHill
JRHill Registered Users Posts: 394 ✭✭✭✭
in Solar Skeptics, Hype, & Scams Corner #1
Someone on a different forum recently asked if a such-n-such inverter had a Low Frequency Transformer  :|  Where does this stuff come from?? I've never seen any manufacturer or vendor harping on Low or High freq inverters but people sure seem to grab on to the techno speak. Are these low end units trying to market themselves like they have addressed a long existing inverter problem or something along that order?
Off Grid. Two systems: 1) 2925w panels, OB VFXR3648, FM80, FNDC, Victron BMV-712, Mate3s, 240 xformer, four SimpliPHI 3.8; 2) 780w, Morningstar 30a, Grundfos switch, controller and AC/DC pump, 8 T105. Honda EU7000is w/AGS. Champion 3100. HF 4550, Miller Bobcat.
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Comments

  • BB.
    BB. Super Moderators, Administrators Posts: 33,670 admin
    #2
    No expert--But the typical answer is Low Frequency Transformer units are heavier (more copper, more iron, more expensive to build), and have better surge capabilities.

    High Freq units are lighter (less iron, less copper, cheaper to build) and have less surge current capabilities.

    A nice overview of H vs L inverters with some actual numbers (I.e., weight/size/power differences):

    https://www.solarinvertermanufacturers.com/low-frequency-vs-high-frequency-inverters/

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • JRHill
    JRHill Registered Users Posts: 394 ✭✭✭✭
    #3
    That's a really good article, Bill. It puts the topic in layman's terms as best can be done.

    I am sure glad I have a low freq inverter - or I think I do. Now I have to figure out what a low frequency transformer is  ;)
    Off Grid. Two systems: 1) 2925w panels, OB VFXR3648, FM80, FNDC, Victron BMV-712, Mate3s, 240 xformer, four SimpliPHI 3.8; 2) 780w, Morningstar 30a, Grundfos switch, controller and AC/DC pump, 8 T105. Honda EU7000is w/AGS. Champion 3100. HF 4550, Miller Bobcat.
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  • Dave Angelini
    Dave Angelini Solar Expert Posts: 6,957 ✭✭✭✭✭✭
    #4
    Get a deep well pump and you will figure it out😉
    "we go where power lines don't" Sierra Nevada mountain area
       htps://offgridsolar1.com/
    E-mail offgridsolar@sti.net

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  • JRHill
    JRHill Registered Users Posts: 394 ✭✭✭✭
    #5
    Yup, that's for sure. But that's why God gave Mr. Grundfos some good ideas.

    I recently got an email from NAZ that they are carrying a new line of AC/DC pumps.
    Off Grid. Two systems: 1) 2925w panels, OB VFXR3648, FM80, FNDC, Victron BMV-712, Mate3s, 240 xformer, four SimpliPHI 3.8; 2) 780w, Morningstar 30a, Grundfos switch, controller and AC/DC pump, 8 T105. Honda EU7000is w/AGS. Champion 3100. HF 4550, Miller Bobcat.
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  • Dave Angelini
    Dave Angelini Solar Expert Posts: 6,957 ✭✭✭✭✭✭
    edited March 27 #6

    Yup Sun Pumps! Big fan !  There are cases where neither will work in some large farming/Ranching apps. Below a toroid wind style from XW. About 75 pounds.




    "we go where power lines don't" Sierra Nevada mountain area
       htps://offgridsolar1.com/
    E-mail offgridsolar@sti.net

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