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Powerwall vs Panasonic Harbor Plus Smart Battery

Discussion in 'Tesla Energy' started by Babaron, Jun 21, 2018.

  1. Babaron

    Babaron Member

    Joined:
    Jan 24, 2017
    Messages:
    30
    Location:
    SW Ohio and central FL
    Ok, so I have been seeing thread after thread where people are having a multitude of issues with the PW. Since I am just getting ready to do a site survey for my Tesla PV system, I thought I would ask if any forum members out there have any good things to say about their PW's. I am in line for the PW, but could switch to the Smart Battery if it makes more sense.

    So please chime in if you have installed a PW and have had no issue with it at all.

    Thanks!
     
  2. cwied

    cwied Member

    Joined:
    Jan 13, 2015
    Messages:
    382
    Location:
    San Mateo, CA
    I have a dual Powerall system running since Feb 15. I'm very happy with the way they're performing and the price worked out to be much cheaper per kWh than other systems. The big plus is that I also have whole-house backup, which would have been hard to achieve with any other system.

    The only issues I've had are teething problems with the new time-based controls. It's been working fine for the past week and a half, though.
     
  3. Tam

    Tam Active Member

    Joined:
    Nov 25, 2012
    Messages:
    4,075
    Location:
    Visalia, CA
    What's the cost comparing to the retail listing of 14kWh Powerwall:

    $5,900 1 Powerwall
    $ 700 Supporting hardware
    ---------------------------------------
    $6,600 Total equipment cost
     
  4. Babaron

    Babaron Member

    Joined:
    Jan 24, 2017
    Messages:
    30
    Location:
    SW Ohio and central FL
    Contacted dealer and waiting for call back with price.
     
  5. GenSao

    GenSao Member

    Joined:
    Aug 3, 2017
    Messages:
    169
    Location:
    Pleasant Hill, CA
    Overall I am satisfied with my Powerwalls. The major benefits are:
    • Cost savings with mitigating of the utility's Time of Use rates
    • Whole home house backup with 2 Powerwalls
    • (Potential) Integration with Tesla vehicles though the app
    Some minor cons:
    • Install times for most can take a while, I am fortunately that I am in California where there is not as bad of a lag with installation.
    • Better software integration and options. Like other Tesla products, this can be fixed with updates. I would like to see the option to stop charging a Tesla car in the case of a grid outage. This is especially important during overnight charging.
     
    • Like x 3
  6. arnolddeleon

    arnolddeleon Supporting Member

    Joined:
    Jul 21, 2012
    Messages:
    287
    Location:
    California
    The price on the PW2 was compelling for me. I expected that there were going to be issues and limitations and Tesla has not disappointed on that front. One of my regret so far is I didn't get a 3rd one. I believe I could have switch to the SGIP program for larger installations and gotten similar rebates. Tesla was not helpful on that front, they were recommending that I get 3rd unit (because my PV size was just over their design guidelines for 2 PWs) but I said no because the economics didn't work without the rebate. Tesla has been surprisingly conservative at pushing rebates. I think they don't want to promise a rebate they don't control.

    The unfulfilled bet is that Tesla will offer the option to aggregate our units to a virtual power plant. I think that's when the economics really get good. For now I'm reasonably comfortable with my bet. I should break even in 7-10 years with the benefits that I have now.

    I would recommend anyone going with Tesla counting on a rebate like SGIP that requires work from the vendor (Tesla) have something in the contract/payment terms that clearly states their responsibilities. After I paid Tesla in full I felt a little powerless while I was waiting for them to finish the paperwork for the SGIP rebate. I don't expect Tesla to float the rebate amount but in hindsight I would have requested a holdback on the contract until they submitted all the paperwork for the rebate and the utility has given the PTO.
     
    • Informative x 1
  7. ICUDoc

    ICUDoc Member

    Joined:
    May 19, 2015
    Messages:
    691
    Location:
    Sydney NSW
    Mine just works (PW2).
    Nil issues- very happy.
     
    • Informative x 1
  8. Bigtanuki

    Bigtanuki Member

    Joined:
    Dec 19, 2016
    Messages:
    105
    Location:
    Atascadero, California
    My system has been up since August 2017 with few issues. I have two units and 4.1 kW of solar on the central coast area of California. My goals had originally been to minimize power sold back to PG&E due to the very small payback on the rate plan on I was on ([email protected] ~20 c/kWH and sell @ ~3 c/kWH). I have subsequently moved to the EV-A rate and found that the utility pays significantly higher amounts for sold electricity during peak and partial-peak times making it more financially sensible to sell back excess solar.
    My current configuration uses grid from 2300 - 0700, primarily for charging my Model S otherwise I'm on solar or battery. Currently, I'm seeing enough solar to recharge the batter to 100% by about noon each day so I go into the peak with a full battery and divert all solar back to the grid. We are fortunate enough to live inland about 15 miles as the crow flies so we benefit from the marine layer most evenings resulting in very little air conditioning usage most of the year, perhaps 2 or 3 weeks in the hottest months. Average non-occupied system usage is less than 8 kWh / day. Occupied is about 25 kWh/day. These numbers are for 2700 ft2 home with good south and west exposures.

    I have found that the new TBC settings required some tweaking to meet my needs but overall I'm happy.
    I think the key takeaway is that the Powerwall, while not a perfect product, is able to upgraded over the air with firmware updates. Absent that capability, I wouldn't even consider any other system.

    One last thing; we've had 8 outages since installation. Most have been short, less than 10 minutes, but two were more than an hour. All were seamless to the computer and any other electronics.

    I'm happy.
     

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