Tesla 2 Powerwall Home Battery

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ABrown
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Joined: Sun Oct 12, 2014 7:56 pm
Location: Aberdeenshire

Re: Tesla 2 Powerwall Home Battery

Postby ABrown » Thu May 03, 2018 4:16 pm

noahs-dad wrote:ABrown - how are you getting on with your PW? Are you out during the day and feeling you are getting a good average daily saving? Is your battery typically filled up by dinner time at this time of year? Do you find it easy to operate and use, or are you on timer settings?


The PW is totally integrated into the solar array and does not require any input from me. At the moment the house runs until approx 9-10pm on battery if it has been a sunny day.

mgill
Posts: 662
Joined: Sat Oct 05, 2013 7:13 pm

Re: Tesla 2 Powerwall Home Battery

Postby mgill » Mon May 14, 2018 7:03 pm

PS. The Powerwall has now been updated to allow off-peak recharging... (I'll be getting one too now!)

https://twitter.com/ElectrekCo/status/9 ... 2592488451

noahs-dad
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Location: Dunbar, East Lothian

Re: Tesla 2 Powerwall Home Battery

Postby noahs-dad » Tue May 15, 2018 8:52 am

With a Tesla to charge, you might need a fair few batteries in your PW2 array!

A single 14kW with 11kW useable is not going to cut it for me (though would be a welcome start) as I have plenty excess PV + plenty use for it from a battery. 15kW is about a full charge on the Leaf if starting at 25%. I also have another BEV to charge needing about the same volume of charge, as well as electric heating and all the other usual stuff.

Might be that 14kW is all I can budget for now, and will have to add more later. The ability to add later is a great feature also. I intend to find out more about that, particularly what the cost difference is between getting your desired size in one go at point of install, or adding to it later. I think a 3 x 14kW size for the PW2 would be ideal for me for the next couple of years.

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Buzby
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Re: Tesla 2 Powerwall Home Battery

Postby Buzby » Thu May 17, 2018 11:24 am

mgill wrote:PS. The Powerwall has now been updated to allow off-peak recharging... (I'll be getting one too now!)

https://twitter.com/ElectrekCo/status/9 ... 2592488451


I still cannot get the figures to work - I want payback within 8 years max, (my Solar PV was only 4) but even with the very late arrival of off—peak top up, I’m sitting at 12 years at best.
- Raymond (Glasgow)
EVA Communications

noahs-dad
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Location: Dunbar, East Lothian

Re: Tesla 2 Powerwall Home Battery

Postby noahs-dad » Fri May 18, 2018 12:45 am

The payback will be quicker but how much, no idea. Will depend on the detail (£'s of income) when the grid contribution scheme gets confirmed (this year I think?). Although I am personally setting my bar low on that one so I won't get too disappointed and am not going to factor it in to my decision making.


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