Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 
130 posts

Master Geek
+1 received by user: 12

Lifetime subscriber

  Reply # 1920188 15-Dec-2017 13:33
One person supports this post
Send private message quote this post

SQLGeek:

 

I have just ordered and paid a deposit for a Tesla Powerwall 2, I would been keen to hear from other NZ owners.

 

Telsa are sending someone round to do a quote in January. It is expected to cost $13K to $14K installed. The deposit is refundable. 

 

My place in Christchurch has a PV system with 15 x 270 Watt panels with Enphase M215 micro inverters. I have 3 phase power, so there is only 5 panels per phase. I often export on 2 phases and import on the other! This makes my system very inefficient, hopefully the battery will help with this.

 

Like most people I really only have excess supply in the summer. The aim is to top up the battery with cheaper night-rate power at other times.

 

Solar without a battery you are limited to power retailers who support buy-back. Once the battery is installed I can look to switch to a retailer like Flick which should help reduce my bill even further.

 

How have you found your Powerwall? Any tips? What was the impact to your monthly bill?

 

TIA

 

 

I'm a Tesla Powerwall 1 user. This system was installed in May of this year with a SolarEdge inverter. 

 

I already had 18 x 270 watt solar panels with a SolarCloud inverter and this was installed in March 2015. 

 

The additional of the Tesla battery means that I have two inverters, while each inverter does its own thing for its chosen installation. The 2nd inverter 'knows' about the 1st installation and can report on both, it also knows what generated power is used or exported.

 

When the battery was installed, I had a tiny portion of the house wiring re-routed so that it would carry on working during the rare power outage. I don't believe there's enough capacity in the batteries to last longer than a couple of hours and that's limited to the house lights, the water pump and my mancave.

 

As for the impact on my yearly electricity costs, I would say that they have reduced by as much as 30% each year.... I estimate that I should get to break-even by 2025.

 

 


2777 posts

Uber Geek
+1 received by user: 582


  Reply # 1920251 15-Dec-2017 15:10
Send private message quote this post

rogercruse:

 

. I don't believe there's enough capacity in the batteries to last longer than a couple of hours and that's limited to the house lights, the water pump and my mancave.

 

This Spec sheet says the max draw is 3.3kw, so that should happily run what you describe. With a 6.6kwh capacity, you could run for a full two hours at that rate, but given your described load it should be good for 4-6 hours happily (depending on the size of the TV and  Amp in the mancave :)

 

http://mcelectrical.com.au/wp-content/uploads/2017/02/Tesla_Powerwall-1_Datasheet_v3-3_English.pdf


 
 
 
 


5 posts

Wannabe Geek


  Reply # 1920751 17-Dec-2017 11:03
Send private message quote this post

Whats the current Powerwall 2 wait time listed as?  

The last I heard from people that had placed orders even 4 months ago was that it could be around 1 yr wait time, and even then who knows if there would be further delays right?  After all Tesla does not usually meet it's timeframe deadlines that it announces.


663 posts

Ultimate Geek
+1 received by user: 228


  Reply # 1920771 17-Dec-2017 13:29
Send private message quote this post

I don't think the PowerWall serves as a backup, unless there's some optional hardware for anti-islanding

Anti-islanding keeps you from killing utility line workers, who are reparing power lines they believed are unpowered.


167 posts

Master Geek
+1 received by user: 56


  Reply # 1920817 17-Dec-2017 17:56
Send private message quote this post

Isn't the backup gateway in your picture providing exactly that protection? Gateway opens when there is a power cut, protecting the workers and allowing the powerwall to power the house, closes again when power is restored?

663 posts

Ultimate Geek
+1 received by user: 228


  Reply # 1921126 18-Dec-2017 10:14
Send private message quote this post

The backup gateway is an extra optional piece.

It does cost more to install, so I'd be interested if it's included.

It's a bit more complicated than opening a switch when the power goes off.

I believe it provides a sine-wave so the PowerWall has something to sync to.

663 posts

Ultimate Geek
+1 received by user: 228


  Reply # 1921587 19-Dec-2017 07:38
Send private message quote this post



From Tesla

The Powerwall system consists of the Powerwall unit and supporting hardware called the Backup Gateway.

For whole home backup, an upgrade to your main electrical panel may be needed to integrate Powerwall.

Tesla will recommend the number of Powerwalls needed to back up your entire home. You can add more Powerwalls to keep your house operational during longer outages.

If your electrical situation doesn’t allow for a whole home backup, you can back up selected essential loads such as lights and outlets. Since these require less power, a single Powerwall will typically be sufficient.

For [partial home] essential load backup, a secondary electrical panel is usually required to separate out the essential loads.

1 | 2 
View this topic in a long page with up to 500 replies per page Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

New Zealand hits peak broadband data
Posted 18-Jan-2018 12:21


Amazon Echo devices coming to New Zealand early February 2018
Posted 18-Jan-2018 10:53


$3.74 million for new electric vehicles in New Zealand
Posted 17-Jan-2018 11:27


Nova 2i: Value, not excitement from Huawei
Posted 17-Jan-2018 09:02


Less news in Facebook News Feed revamp
Posted 15-Jan-2018 13:15


Australian Government contract awarded to Datacom Connect
Posted 11-Jan-2018 08:37


Why New Zealand needs a chief technology officer
Posted 6-Jan-2018 13:59


Amazon release Silk Browser and Firefox for Fire TV
Posted 21-Dec-2017 13:42


New Chief Technology Officer role created
Posted 19-Dec-2017 22:18


All I want for Christmas is a new EV
Posted 19-Dec-2017 19:54


How clever is this: AI will create 2.3 million jobs by 2020
Posted 19-Dec-2017 19:52


NOW to deploy SD-WAN to regional councils
Posted 19-Dec-2017 19:46


Mobile market competition issues ComCom should watch
Posted 18-Dec-2017 10:52


New Zealand government to create digital advisory group
Posted 16-Dec-2017 08:47


Australia datum changes means whole country moving 1.8 metres north-east
Posted 16-Dec-2017 08:39



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.