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  • A Shelly plus 2PM is working with 12V DC supply, but has to be modified. This thread gives a glimpse in the guts of the Shelly and has a sketch of the internal power supply:

    thgoebel
    11. Oktober 2022 um 13:39

    How a modification can be done is described here with a Shelly 2.5 which is very similar to a Shelly plus 2PM:

    DIYROLLY
    30. November 2021 um 19:48

    Please be aware that voltage, current and power measurements a not working with DC supply. And the two relay contacts are bound to GND.

    „Habt Geduld. Alle Dinge sind schwierig, bevor sie einfach werden!“ (aus Frankreich)

    „Nothing in life is to be feared, it is only to be understood.“ (Marie Curie, 1867-1934)

    „Comment is free, but facts are sacred“ (C.P. Scott, britischer Verleger)

  • Indeed, it will not work with 12V DC without modification. But with 24V DC, it will work out of the shelf. Without power measurements, as described above. Plus 24V is connected at pin N, GND/minus at pin L…

    „Habt Geduld. Alle Dinge sind schwierig, bevor sie einfach werden!“ (aus Frankreich)

    „Nothing in life is to be feared, it is only to be understood.“ (Marie Curie, 1867-1934)

    „Comment is free, but facts are sacred“ (C.P. Scott, britischer Verleger)

  • thanks

    I will maybe use 2 potential free relays to switch 12VDC and power them with normal 230VAC. Then need to add normal Shutter Controller in between and it should work.

    Can I use Shelly mini with 12VDC on relay side and with 230VAC as Supply Voltage? Will this work?

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