[RE-wrenches] Tesla Powerwall battery paired with solar

[boB at midnitesolar.com]

When I was at Intersolar 2 years ago in Munich I saw Solar Edge's system.
This article mentioned them as one of their partners.

This was for Europe's "Self Consumption" program.  The solar array is 
somewhere
around 400 volts DC, regulated somewhat by the optimizers, and feeds 
into the
input of the bi-directional inverter and at the same time, to the 
bi-directional
charge controller and into the batteries (48V I think)

So the charge controller can take from the batteries and feed to the 
400V (ish)
bus and come out the inverter as AC to the grid and of course to power 
the house.

There was a whole bunch of this kind of battery-solar interactive stuff 
at that show.
It was a pretty cool thing.  They (Germany, etc) want to be able to 
offset the utility
usage during peak times to relieve the grid.

I figured it was just a matter of time before something like this might 
show up here.
I think this may be similar except at 400V battery.

But  this new system, with the inverters as small power wise as they are 
going to
start out as, will not quite "power your house" ?

The article I read made it sound like this was something  brand new.

Imagine, people making their own electricity ?  Can't be done ! Can it ?

boB


On 5/1/2015 5:02 PM, Jay wrote:
> From what I've read on teslas website.
> The batteries are 350-450vdc.
> These are not for existing 12-48v battery based inverters.
>
> Jay
> Peltz power
>
>
>
>
> On May 1, 2015, at 4:46 PM, "Glenn Burt" <glenn.burt at glbcc.com 
> <mailto:glenn.burt at glbcc.com>> wrote:
>
>> I can tell you that the Solar Edge inverters do not support AC 
>> coupling, as their reps told me at the NABCEP CE conference…
>>
>> I have seen pictures of some Solar City battery systems that use an 
>> XW as the inverter.
>>
>> *From:*RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] 
>> *On Behalf Of *August Goers
>> *Sent:* Friday, May 01, 2015 6:50 PM
>> *To:* RE-wrenches
>> *Subject:* [RE-wrenches] Tesla Powerwall battery paired with solar
>>
>> Hi Wrenches,
>>
>> I’m sure you’ve seen the Tesla Powerwall press releases by now:
>>
>> http://www.teslamotors.com/presskit/teslaenergy
>>
>> We are already getting calls from interested homeowners. The product 
>> mostly seems like a toy for wealthy people but nonetheless I would 
>> like to be educated in how it works.
>>
>> There is mention that the battery pairs with Solar Edge inverters 
>> which makes sense because both the Powerwall and Solar Edge work off 
>> of ~350 VDC.  But, I can’t figure out how off grid operation would 
>> work during power outages. Maybe another battery inverter like a 
>> Schneider Conext is required?
>>
>> Any thoughts on this product for better or worse?
>>
>> Best,
>>
>> August
>>
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