Tesla Powerwall 2

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Re: Tesla Powerwall 2

Postby offgridQLD » Sat Mar 04, 2017 6:38 pm

So a minimum of two units at 13.2kwh each 26.4kwh nice capacity for a full time offgrid family home.

No DC units....I think the issue for people looking for (offgrid setups) is 99% of people are on the grid and products are going to be geared towards that market. Tesla need to sell a colossal amount of battery cells to justify that battery factory they just built and being distracted catering to niche markets (offgrid homes) isn't smart. Turn key solutions for the masses is there target.

I guess if you really want the cells you could always buy two AC units and use the cells at the 50v level. Though any advantages based on 10 year warranty are out the window then.
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Re: Tesla Powerwall 2

Postby davidg » Sat Mar 04, 2017 7:05 pm

offgridQLD wrote:Tesla need to sell a colossal amount of battery cells to justify that battery factory they just built and being distracted catering to niche markets (offgrid homes) isn't smart. Turn key solutions for the masses is there target.

Although they very recently changed the "10 year" warranty conditions, they are far less attractive as result, than one would think think once you fully understand the warranty conditions, they now have.
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Re: Tesla Powerwall 2

Postby offgridQLD » Sat Mar 04, 2017 7:49 pm

So I assume they are only have a warranty on workmanship and not capacity? Or something similar.
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Re: Tesla Powerwall 2

Postby Gordon-Loomberah » Thu Mar 09, 2017 12:16 pm

Official launch of the Powerwall 2 AC in Australia, article on RenewEconomy here:
http://reneweconomy.com.au/tesla-launch ... age-53696/

Get in quick to beat the rush and order yours from Energy Matters here! http://www.energymatters.com.au/residen ... l-battery/
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Re: Tesla Powerwall 2

Postby dRdoS7 » Thu Mar 09, 2017 1:05 pm

Hi,

Gordon-Loomberah wrote:Official launch of the Powerwall 2 AC in Australia, article on RenewEconomy here:
http://reneweconomy.com.au/tesla-launch ... age-53696/

Get in quick to beat the rush and order yours from Energy Matters here! http://www.energymatters.com.au/residen ... l-battery/


Don't get trampled in the rush!

Additional Specs Download the Tesla Powerwall 2 AC Datasheet
(Note: A DC variant is also available)


Needs an update I think.

So, does this use DC to charge the batteries from AC which comes as DC from the panels?

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Re: Tesla Powerwall 2

Postby Gordon-Loomberah » Thu Mar 09, 2017 2:10 pm

I've already pointed out that mention of a DC variant, and it will have been fixed by now.

Yes if you are using another AC coupled inverter as per the diagram on that page, an internal AC powered DC charger will be used to charge the battery. I'm not sure how it is done if the DC is connected directly to the Powerwall, (although I suspect it is the same) but will try to find out today.
(EDIT: It apepars the AC version doesn't conenct to the PV array, only the DC version does this, and it isn't coming to Oz)
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Re: Tesla Powerwall 2

Postby Gordon-Loomberah » Thu Mar 09, 2017 3:13 pm

OK, the answer is yes, it is always DC to AC to DC to charge the battery, and to charge, it needs a managed AC coupled solar inverter, such as SMA, Fronius or SolarEdge.
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Re: Tesla Powerwall 2

Postby dRdoS7 » Thu Mar 09, 2017 7:28 pm

Hi,

So, it goes DC > AC > DC > AC?

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Re: Tesla Powerwall 2

Postby Gordon-Loomberah » Thu Mar 09, 2017 8:23 pm

Only when running from the battery. It also goes DC > AC when using solar power during the day and when exporting to the grid.
Charging the battery is DC > AC > DC.

I assume this is why the round-trip efficiency is listed as 89%.
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