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How does it work off-grid?

Discussion in 'Tesla Energy' started by nwdiver, May 14, 2015.

  1. nwdiver

    nwdiver Active Member

    Feb 17, 2013
    United States
    So... one question has been answered via the Tesla Energy web-site... the power wall is intended to be DC-coupled with 350-400vdc. How does it work off-grid? There are really only two options.

    UL1741 grid-tied inverter DC-coupled to power wall is AC-coupled to off-grid inverter.
    - What powers the off-grid inverter? Do you need another smaller battery? Kinda like the 12v battery in a Tesla?

    Some kind of Hybrid inverter. To my knowledge there is currently no off-grid capable inverter that can use ~350vdc like the power wall uses.... I'm sure WK057 researched this EXTENSIVELY... it would have saved him A LOT of trouble.

    UL1741 inverters CANNOT regulate the power output... does the power wall manipulate output by 'tinkering' with the MPPT algorithm? 'Tricking' the grid-tie inverter into thinking less power is available from the array/battery?

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