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Powerwall backup question

Discussion in 'Tesla Energy' started by Instaurare, May 14, 2017.

  1. Instaurare

    Instaurare New Member

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    Just two questions please..........

    During a power outage, does your grid tied solar system continue to recharge the Powerwall?

    During a power outage, if the Internet is also out of service, does the Powerwall still continue to be recharged by the solar system and provide power to the House? And if it does, how do you know the battery state of charge, since there is no display panel on the Powerwall itself, but only on a smartphone or computer?

    My thanks to anyone who can answer this.
     
  2. Tam

    Tam Active Member

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    Yes.

    With solar system only, your home power would be down when the outside grid is down.

    With a battery system, and in this case, it also pairs with solar system, your home power is still on when the outside grid is down.

    In home function is not affected such as charging your battery.


    Some phone/internet companies would have backup power so even when the grid is down, their landline phones and internet still work.

    If your internet is down, your internet related activities will be down too. That means it cannot transmit its status via internet to your computer or smartphone.

    Your solar system and battery system should function normally because they don't need internet to work. They only need internet to broadcast its status and give you remote controls over the internet.
     
  3. miimura

    miimura Active Member

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    The PowerWall installation has to be done in a specific way to allow it to provide backup power. However, I think most installations will be done this way. The backup power installation requires an automatic transfer switch. This cuts off a portion of your house wiring from the utility. Once the switch has isolated the house, the PowerWall can continue powering some or all of your house and the solar will still generate and possibly recharge the PowerWall if it's generating more than the house needs at that moment.

    Of course, you should put your internet modem and router on the part of the house that is backed up so your internet can stay up during the power outage and you can monitor the PowerWall through the Tesla app. Funny story - the last time the power went out at my house, the first truck to show up was Comcast. It turns out that they have a powered node on their network on the same pole as my utility transformer. The Comcast guy came to hook up a little Honda generator so that their stuff would stay up while this localized power outage was happening.
     
  4. WannabeOwner

    WannabeOwner Active Member

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    In the UK regular solar panels do not provide power during a power-outage - because the power flowing back into the grid could electrocute a linesman working on the repair. I have the ability to isolate the grid from the house, and run the house off a generator instead (also cannot feed generator into house without isolating grid, for same reason) and when I do that my solar panels also work :)

    So seems reason (and indeed as @miimura has said) a Powerwall could do the same thing as my generator - once isolated from the grid.
     
  5. Instaurare

    Instaurare New Member

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    Thanks to everyone for your replies. But please clarify about how to monitor battery state of charge when the Internet is down. Is there a battery monitor that could attach to the system in the case of an Internet outage?
     
  6. Tam

    Tam Active Member

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    You can monitor your solar and battery storage during a grid outage if:

    1) Your internet service has a reliable back up power system that works during a utility grid outage.
    2) Your solar/battery storage setup can handle your home's load without tripping a circuit breaker.

    In that case, your home electrical system would work normally (including your monitoring system) whether there's a current from the grid or not.
     
  7. Instaurare

    Instaurare New Member

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    Tam, if your internet service does not have a reliable backup power system, then is it correct to say that the Powerwall will function during a power outage, but you will not be able to monitor your battery state of charge, since the monitoring will be inoperative? If this is the case, can any external monitors be attached? Thanks!
     
  8. Tam

    Tam Active Member

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    Correct. Your solar/battery storage works flawlessly with or without any current from the utility grid.

    Its monitoring system also works fine too but how it can transmit that information if there is no internet service is the issue.

    In that case, you can have your solar/battery system to pair with a wireless internet provider such as cell phone service or satellite dish internet service.
     
  9. nativewolf

    nativewolf Member

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    tmobile unlimited data plan is great if you have a good tmobile connection. Just cut the cords, go wireless, internet almost never down at all due to weather (used to be an issue for us). If you hotspotted cell phone is working you are good to go, we bought extra cell phone with dual band radio just to use as a hotspot. Rural solution to bad internet connections, huge upgrade over hughesnet and lack of cable/fiber.
     

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