Tesla Powerpack Plus Solar Powers Queensland School, Payback In 6 Years – Video

3 months ago by Mark Kane 16

Tesla has released a video presenting its first single Powerpack installation in a school in Australia, in conjunction with a solar PV system at the Cathedral College in Rockhampton, Queensland.

Tesla Powerpack + Solar Powering Queensland School

The availability of sunny weather encourages many to switch to solar power generation; and an energy storage system compliments a PV system, enabling an establishment to become nearly or fully independent from the grid.

In this case, the school uses power generated in the day to cover 40-50% of its electricity expenses, stating that costs of the system will be covered in just 6 years time.

We are not sure about the entire solar/ESS system scale, but this one is rather one of the smallest when it comes to implementing a Powerpack solution.

“To achieve a sustainable energy future the world needs reliable, renewable energy around the clock. The Cathedral College in Rockhampton, Queensland is the first school in Australia to Tesla Powerpack store sustainable energy generated from solar during the day to power the boarding house during the evening and into the morning.”

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16 responses to "Tesla Powerpack Plus Solar Powers Queensland School, Payback In 6 Years – Video"

  1. DJ says:

    It would interesting to know how quickly the payback would have been without the power pack.

    Sadly in parts of SoCal I think a battery will be necessary if you want to have a decent payback with solar anymore for new customers. Due to their changing of TOU from Noon to 6 until 4 to 9 it means most people will consume grid at a higher TOU price in the evening while they produce at a lower rate in the middle of the day. Need a battery to cover that evening use so you don’t get dinged. Either that I guess or just put even more panels on which is likely more costly 🙁

    1. Mark.ca says:

      They are playing a dangerous game here and are counting on people just biting the bullet and not turning to battery packs. In a few years they will be proven wrong.

  2. Tom says:

    I wonder what the cost of something like this is. They are 100kwh individually or thereabouts correct? I would think a larger house with a couple EVs that wanted to have solar provide the bulk of power needs could use something this big. You might discharge 50kwh a day (evening and overnight) just on EV charging.

    1. DJ says:

      ~200 I believe. My guess is that it is more expensive than if you were to buy enough power walls (if you can) to get 200 worth given that these are for utilities and I suspect are higher spec but who knows.

      1. Tom says:

        Certainly that big inverter is overkill for a house but you could put a regular one in there and just the big storage. I just checked my electric bill. I am averaging 2000 kwh per month and had a peak 200kwh day last month. And that is WITHOUT EV charging. That’s what happens without nat gas hookups for stove, hot water, etc.

        1. Mark.ca says:

          You probably have a big house and big family. My house never got over 50kWh/day even with an ev…and even for this little my solar payout is about 6 years. If you don’t have solar you really need to take a look into it.

          1. Tom says:

            Bingo. Hoping to build a new house in 2 years and put solar on it. Tesla roof would be cool. Perhaps it will be out by then.

            1. Mark.ca says:

              …out and quite expensive for a big roof. If that doesn’t work definitely go for the panels, it’s well worth it.

            2. windbourne says:

              actually, it will not be that expensive for the part of the roof that is not solar. That part will be like the price of a tiled or slate roof (something like 17/sq ft).
              However, the price for where there is solar will be like tile/slate combined with panel.

              If you live in a place like COlorado or Western Texas where we get golf ball size hail, this is very useful.

  3. John says:

    I wonder when Tesla will “supersize” the residential battery. The PowerWall is great for some peak shaving and short emergency backup power…but I want to be 99% independent.
    Our house is 100% electric, and we have 2 electric vehicles. 60kWh per day is not unusual, and in the nasty part of winter, our usage skyrockets. A 100kWh battery would be enough to get us through most days with some reserve, but there would still be times when we would need grid power, or an even bigger battery.

    I really don’t want 8 individual PowerWalls. Give me a 100kWh PowerPack and a 40kW inverter and I’ll be happy. Happy enough that I might buy a second 100kWh battery to sit beside the first!

    Kansas utilities have declared war on solar, and grid-tie will be the first casualty. I’d like to just unplug completely.

    Jack at EVTV.me has a great little project going on called “Selfishly Solar.” The post/video are a little lengthy, but worth it.

    http://evtv.me/2017/07/selfishly-solar/

    1. Someone out there says:

      The cheapest kWh is the one never used. Maybe you should look at lowering your demand first? Better insulation and heat pumps might be better investments than a huge battery at this time.

    2. Doggydogworld says:

      Power Pack is 200 kWh. Single unit price is probably around $80k, installed.

      You’d probably still need to dial your usage back during bad winter stretches.

      1. Mark.ca says:

        That $80K pack has 0 chance of ever having a positive ROI in his case.

    3. windbourne says:

      John, save your money and switch to geo-source heat pump (for home and h2o), check insulation and windows, and THEN add the battery.

      If you get your usage way down, then you will not need large batteries.

    4. John says:

      The house is 2×6 construction with foam insulation (Next house will be ICF and 18 inches thick). HVAC is air source heat pump (Geo was not an option due to geology.) The house is 100% LED lit. We have a heat pump water heater, and will soon replace our clothes dryer with a heat pump version as well. Exterior lights are on timers and various lights in the house are either controlled by home automation or motion sensors. Windows are triple pane and sealed well. We’re about as efficient as you can be without spending a fortune.

      The primary driver behind our above average usage is owning 2 electric vehicles. They account for 1/3 – 1/2 of total.

  4. Brave Lil' Toaster says:

    And they even have space on their roof for more solar panels!

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