[RE-wrenches] Tesla Powerwall battery paired with solar

[Glenn Burt]

Well on March 31st I had a conversation with Luc Collin who is a Field Application Engineer with Solar Edge, and I asked him if they support AC coupling with their systems.

He told me that no, they do not, and I took that as the official Solar Edge position from a warranty standpoint. 

Now if John said something different since then, I do not recall it, however if it were stated prior to March of this year, perhaps he said it with a wink-wink, nudge-nudge as in it could be done, but perhaps he did not clearly state that SE would support it or honor warranty claims for a system that is installed that way.

 

Glenn Burt

glb, Consulting Company

1949 East Road

Bennington, VT 05201

glenn.burt at glbcc.com

(518) 587-7745

(518) 681-2274

 

NABCEP Certified PV Installation Professional TM

Microsoft Certified Professional

Member IEEE

 

 

 

From: Kirk Herander [mailto:kirk at vtsolar.com] 
Sent: Saturday, May 02, 2015 7:22 AM
To: glenn.burt at glbcc.com; 'RE-wrenches'
Subject: RE: [RE-wrenches] Tesla Powerwall battery paired with solar

 

John Berdner of Solaredge (still with them??) in a previous discussion on this forum has stated that Solaredge can be AC-coupled, with a firmware tweak I believe he said.

 

Kirk Herander

VT Solar, LLC 

Proven PV provider since 1991

www.vermontsolarnow.com

dba Vermont Solar Engineering

NABCEPTM Inaugural Certificant

VT RE Incentive Program Partner

802.863.1202

 

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Glenn Burt
Sent: Friday, May 01, 2015 7:47 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Tesla Powerwall battery paired with solar

 

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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