[RE-wrenches] Availability of Powerwall Batteries

Tue Jan 19 07:55:28 PST 2016

SE, both inverter and optimizers are now compatible with Sunpower? Someone also told me Sunpower now makes a negatively grounded panel.

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Marco Mangelsdorf
Sent: Monday, January 18, 2016 10:27 AM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Availability of Powerwall Batteries

SE and SunPower are compatible.  SunPower has recently started providing SE through their residential dealer channel.

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Kirk Herander
Sent: Monday, January 18, 2016 4:44 AM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Availability of Powerwall Batteries

I’m not sure the Powerwall actually exists yet. Our utility, Green mountain Power, has announced a pilot program using them in selected residential applications, but they have no product at this point to my knowledge.

And I don’t think SE optimizers are compatible with Sunpower, if not for other reasons using a SMA inverter. Aren’t they unique to the SE inverter only?

Kirk Herander

Owner|Principal, VT Solar, LLC 

Celebrating our 25th Anniversary 1991-2016

www.vermontsolarnow.com

dba Vermont Solar Engineering

NABCEPTM  2003 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 Peter Parrish
Sent: Sunday, January 17, 2016 7:44 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Availability of Powerwall Batteries

I know a fair amount about Sonnen. I thought their main thrust was 480 V/3P & LiFePO4 batteries, and systems for peak demand clipping. Do they have a “residential” offering?

I am looking at 240/120 V split phase. If I can TOU load shifting and battery back-up, that will do it for this customer. 

-          Peter

Peter T. Parrish, Ph.D.

President, SolarGnosis

1107 Fair Oaks Ave.

Suite 351

South Pasadena, CA 91030

(323) 839-6108

petertor at pobox.com

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Dan Fink
Sent: Sunday, January 17, 2016 11:38 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Availability of Powerwall Batteries

Have you looked into SonnenBatterie? To which a number of Tesla execs have recently bailed out to work for?

As always with all these new hypey Lithium storage systems, their presentations had everything except the information that real Wrenches actually need. But I was able to glean the info that Sonnenbatterie works with existing 48VDC nominal equipment and input, and 120/240VAC inputs also. 

Following all the info coming out, but i'd rather let someone else be the guinea pig. And, of course, big $$$$ per kWh of storage.

Dan Fink

Adjunct Professor, Ecotech Institute

IREC Certified Instructor™ for: 

~ PV Installation Professional

~ Small Wind Installer

Executive Director, Buckville Energy

NABCEP Accredited Continuing Education Providers™
 <tel:970.672.4342> 970.672.4342

On Sun, Jan 17, 2016 at 12:06 PM, Peter Parrish <peter.parrish at calsolareng.com> wrote:

I have a residential client who wants a grid tied PV system with battery backup. The client wants everything to be top of the line: Sunpower modules. Tesla Powerwall batteries. 

Unfortunately, I have been spending time recently researching "smart energy storage" for commercial applications focusing on peak demand shaving. These are 480 V 3-phase systems with 30 kW inverters and 48+ kWh Lithium technology batteries. I think I am beginning to understand the performance trade-offs and how these systems can complement PV to reduce demand charges as well as usage charges.

My problem, is that I have not spent as much time researching the newer residential GTBB offerings. I have studied the Juicebox offering – Schneider XW5548 plus NMC Lithium batteries -- but that’s about it. I don’t know the default vendor for the NMC batteries and if not Powerwall, could Powerwall be a replacement? 

Otherwise, does anyone know how to access the Powerwall offerings?  Also has anyone had success getting a rebate in CA through the SGIP/AES program? I know to qualify for SGIP one needs to demonstrate load shifting as opposed to (or in addition to BB).   

There seems to be an offering from Solaredge (Storedge), but it is not clear their optimizers work with the 96 cell Sunpower X21-345, for example.

I am convinced that smart storage will become more important over time, and I would like to use this customer to “get smart”, and prepare for future business of this sort.

Any practical knowledge would be greatly appreciated. I am happy to exchange information on commercial demand management offerings.

-          Peter

Peter T. Parrish, Ph.D.

President, SolarGnosis

1107 Fair Oaks Ave., Ste. 351

South Pasadena, CA 91030

(323) 839-6108 <tel:%28323%29%20839-6108> 

NABCEP Certified PV Installation Professional #031806-26

peter.parrish at solargnosis.com

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