[RE-wrenches] Portable Power Centers

[Peter Parrish]

They are expensive. But from a technical point of view, very few people understand (or know how to use) the concept of “Days of Autonomy”. I personally use a 3X factor but if I want to be extra conservative and the application is is critical I use a 4X factor.

- Peter

Peter T. Parrish
SolarGnosis
1107 Fair Oaks Ave. Ste. 351
South Pasadena, CA 91030
(323) 839-6108
peter.parrish at solargnosis.com

From: Dan Fink
Sent: Sunday, December 9, 2018 9:10 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Portable Power Centers

Every one of these I've seen so far....dating back over 10 years....drastically undersizes the battery bank, I assume because that's the expensive part.


Dan Fink
Professor of Solar Energy Technology, Ecotech Institute
IREC Certified Instructor™ for: 
~ PV Installation Professional
~ Small Wind Installer
Executive Director, Buckville Energy
NABCEP Registered Continuing Education Providers™
NABCEP PV Associate

970.672.4342

 


On Sun, Dec 9, 2018 at 9:21 AM glenn.burt at glbcc.com <glenn.burt at glbcc.com> wrote:
I recently saw a YouTube video that compared 4 or 5 portable power units. You might try a search there.

Glenn

Sent from my 'smart' phone so please excuse spelling and typos.

------ Original message------
From: Peter Parrish
Date: Sun, Dec 9, 2018 1:17 AM
To: RE-wrenches;
Cc: 
Subject:[RE-wrenches] Portable Power Centers

We are working with Turning Point Foundation a 501(c)3 to provide off-grid power for their River Haven project which is providing transitional housing for homeless folks in the Ventura CA area.
 
The site is truly off-grid and currently uses propane to power three refrigerators and cook stoves. There is no space heating for the single occupancy rooms as of yet. But that’s another problem.
 
We are looking to specify DC refrigerators and PV-powered battery storage for the River Haven project. We are looking at the Goal Zero Yeti-3000 system (3000 Whr, 500 full discharge cycles, to 80% residual capacity) at a sale price of $2,400 but are finding the extra cost of their PV modules quite steep. And looking at other 36-cell (12 volt) modules, I can’t find anything for less than $1.10/W. 
 
Since Goal Zero is looking at the recreational market, I thought that there might be o ther companies with comparable product offerings that are focusing on other markets like developing countries.
 
Any advice would be appreciated and you may contact us off-line.
 
Peter T. Parrish
SolarGnosis
1107 Fair Oaks Ave. Ste. 351
South Pasadena, CA 91030
(323) 839-6108
peter.parrish at solargnosis.com
 
_______________________________________________
List sponsored by Redwood Alliance

List Address: RE-wrenches at lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/attachments/20181210/d9e23d9b/attachment.htm>