Tesla home storage

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Tesla home storage

Postby jimbo » Mon May 04, 2015 6:31 pm

http://www.businessinsider.com.au/here-comes-teslas-missing-piece-battery-announcement-2015-4

Tesla’s selling price to installers is $US3500 for 10kWh and $US3000 for 7kWh. (Price excludes inverter and installation.) Deliveries begin in late Summer.


Antone seen this? How do the prices compare?
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Re: Tesla home storage

Postby Gordon-Loomberah » Mon May 04, 2015 8:09 pm

Yes, already posted in a couple of other threads. They wont be available in Oz for some time yet- perhaps 3rd quarter of the year.
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Re: Tesla home storage

Postby karrak » Tue May 05, 2015 11:25 am

Found this link on the wind-sun forum, thought it may be of interest. http://www.teslamotorsclub.com/showthre ... post994934

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Re: Tesla home storage

Postby Cherokee Solar » Wed May 06, 2015 8:29 am

Hi Jimbo,

I dunno, because everytime suppliers start chucking around words like "innovative" and "game changer" I sort of start to get a bit cautious. Especially when it appears that the technology isn't actually new at all. Lithium batteries have been around for a while now.

Spruikers often use such words to describe financial products which they want to sell to you.

Maybe, I'm just a cynic. On the other hand it would be nice to see such a system work. Incidentally, I noticed in the article that the price quoted was stated to exclude the cost of the inverter and the other bits and pieces (I'm assuming that it will require a charge controller and some sort of AC transfer switch) required to actually use and charge the batteries.
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Re: Tesla home storage

Postby jimbo » Wed May 06, 2015 8:41 am

I'm also surprised at the small size considering they currently manufacturer much larger battery banks for their cars, although it does say they can paralleled.
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Re: Tesla home storage

Postby Gordon-Loomberah » Wed May 06, 2015 8:47 am

I haven't seen too many details yet, but I suspect the charge controller is built in. It certainly is not compatible with typical off-grid charge controllers, due to the high voltage.
They will be compatible with Fronius inverters, which SunEdison* will be offering in Australia later this year. This will enable grid connected systems to operate during blackouts, as well as avoiding peak charge rates in the afternoons, and even avoiding imports from the grid all night for some.

* EM will be SE well before the Tesla battery is availabe here :)
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Re: Tesla home storage

Postby Cherokee Solar » Wed May 06, 2015 8:52 am

Hi jimbo,

I thought the battery banks in the cars were a much larger number of smaller batteries?

Hi Gordon,

Thanks for the info. As I said, it would be good to see such a system readily available for the average household. In rural areas where the power goes out all of the time, it would be a good thing. Still, I wonder what the supply rating on the inverters will be. People will have to be sensible about how much energy the batteries can actually deliver to a household and managing those expectations will be a trial and error thing.

Hope you are getting heaps of rain up your way. Winter is kicking in here and the solstice is fast approaching... I was going to add another 2 x 190W panels this winter but am running out of time for such things. Maybe later.
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Re: Tesla home storage

Postby Gordon-Loomberah » Wed May 06, 2015 9:00 am

Hi Chris, the Tesla 7kWh battery can apparently deliver 2kW continuously and 3kW peak, barely enough IMO, but it would be fine if you had 2 in parallel. Of course, you need a suitably sized inverter, and these days 4 or 5kW units are typical, as the average array size continues to increase.

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Re: Tesla home storage

Postby offgridQLD » Wed May 13, 2015 11:44 am

Link to Q1 questions and answers. Its a recorded Audio conference with Tesla. Relevant discussion to the Power wall starts at 9:20 a few questions should be answered by listening to it. they talk about the CD/CD converter at 25:00

At the 26:00 they talk about the operating temp spec and say it's a error in the spec listing (it's capable of operating at a much higher range)

http://edge.media-server.com/m/p/hdd83nv6

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Re: Tesla home storage

Postby Cherokee Solar » Thu May 14, 2015 8:04 am

Hi Gordon and Kurt,

Thanks for all of the information regarding these Tesla batteries. They've certainly stirred up interest in the general public. People keep asking me questions about them, as if I know anything about the units... :?

I'm assuming that with such a system as the Tesla battery storage you would have to have two inverters installed? One for the grid feed and the other for off grid purposes? And I assume that a battery charger will have to be installed in the system somewhere too?

Cheers

Chris
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