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Solar Roof and Powerwall in Canada

Discussion in 'Canada' started by Struja, Mar 8, 2018.

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  1. Struja

    Struja "Fanboy"

    Joined:
    Jun 27, 2017
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    Location:
    Toronto, Canada
    To my fellow Canadians...

    Have any of you purchased the Tesla Solar Roof tiles and Powerwall?

    If so, can you talk a bit about cost and the amount of energy they produce? Have you become self sufficient in supplying your own energy? Do you have excess and if so, do you sell it back to the grid?

    How much effect does the weather have on energy production? Cloudy rainy days vs. bright sunshine?

    Does snowfall effect the roof? If so, how?

    I have been thinking about this idea but for some reason I have a belief (not based on any actual knowledge) that Ontario would not be an ideal location for a Solar Roof. Again, that isn't based on anything than an assumption, so I'd love to hear about your experiences, especially for those who live in Southern Ontario.
     
  2. wayner

    wayner Active Member

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    I am pretty sure that the Solar Roof is not shipping in Canada right now, and I am not sure that it is shipping in the US either. [sarcasm]I know it is hard to believe for Tesla but this product is behind schedule.[/sarcasm]

    Many of the questions that you ask are not unique to the Tesla Solar Roof - they are the same for all solar panels. The weather does play a huge role in how much power you produce. I have solar panels and you can see my daily production here. I had almost a week of zero production when my panels were covered in snow. The best days will be when it is near the summer solstice and when it is not too hot as heat will reduce the efficiency of the panels.

    The return on investment will depend on the regulatory and pricing regime. Ontario just recently ended microFIT which was a program where the province/utilities bought power from homeowners of solar panels and above-market prices. I installed my panels in 2015 which cost about $31k and I earn $0.384/kWh. I should average about $4500/yr in revenue so I have a seven year payback ignoring taxes. But with microFIT you couldn't use batteries.

    The current regime is net-metering which allows you to net your production against consumption. But when you do net-metering you are not allowed to be on Time of Use pricing, just tiered pricing.

    There are several threads in this Canada sub-forum on this issue - look for other threads on the Solar Roof.

    One other thing to consider is the more that the government screws with the electricity system the less economical it is to install panels. Whenever the governments subsidizes electricity rates (like they are doing right now) they lower the ROI of solar panels. And the Ontario governments has ALWAYS f&*#ed with the electricity grid in the 100+ years of history of electricity generation in Ontario.
     
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  3. Struja

    Struja "Fanboy"

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    Location:
    Toronto, Canada
    That was f'ng awesome. Thanks!
     
  4. Tony_YYZ

    Tony_YYZ Member

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    Apr 7, 2016
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    Location:
    Caledon, ON Canada
    I'd really want to know if it would make sense to consider just a powerwall in the future. Main reasons for wanting it are to protect against blackouts and for power stability.

    The added benefit of charging it up during the night during off-peak hours and then drawing from it during peak hours. It's a bit too expensive to consider right now but maybe by Gen 3 it might be more attractive.

    Thoughts?
     
  5. wayner

    wayner Active Member

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    Toronto
    I think for now you are better off with a NatGas generator. It’s cheaper and can last a lot longer.

    The peak vs off-peak arb isn’t very large and if you do that you run the risk of being discharged when you want it for backup.
     

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