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New Solar and 4 Powerwall Project questions

Discussion in 'Tesla Energy' started by WSE51, Sep 14, 2017.

  1. WSE51

    WSE51 Member

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    I am in the final pre-installation phase of a solar + 4 Powerwall project for my home. For those of you have already done an installation, I'd greatly appreciate any tips from your experience. I still have time to make minor modifications. Thanks.
     
  2. commasign

    commasign Active Member

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    #2 commasign, Sep 14, 2017
    Last edited: Sep 14, 2017
    Are you asking for whole home or partial backup? In the case of whole home backup, it turned out it wasn't possible for my home so I had to quickly make some decisions on which appliances or circuits to leave off the backup panel. So just keep that in mind if it hasn't already been confirmed. Other than that, be prepared for no power for about 8 hours or so depending on the complexity of the install.
     
  3. WSE51

    WSE51 Member

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    Commasign, I am doing partial home backup as we have way too many power needs for either the solar panels or the batteries to fully satisfy. Our installers said that only two Powerwall batteries can be put on a single circuit (according to their reading of Tesla's specs), and we are installing 4 Powerwalls, so we will have two distinct backup circuits running independently. If anyone has achieved 4 Powerwalls on a single circuit please let me know ,thanks
     
  4. commasign

    commasign Active Member

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    @WSE51 - I'm not an electrician, but my plans seem to indicate all 4 powerwalls are on the same circuit. But maybe the rules are different in different cities. We're in PG&E territory.

    Screen Shot 2017-09-14 at 2.23.43 PM.png
     
    • Informative x 1
  5. WSE51

    WSE51 Member

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    commasign, thanks. I will show this to our vendor
     
    • Helpful x 1
  6. WannabeOwner

    WannabeOwner Active Member

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    FWIW I wish that when we had our house rewired we (or the Sparky - he surely should be aware of the need for such a consideration) had thought to group important circuits - so that in a powercut we could easily prioritise the circuits that the generator powers (yup ... Sparky was also asked to install a generator socket on outside of house and Grid/Generator switch-over)

    Would now also be of benefit with PowerWall with/without generator in a powercut.

    Instead of which we have to go around carefully turning stuff off until we get the load down low enough for generator to support.
     

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