[RE-wrenches] Array/battery relationship (WAS Battery Watt hours FLA VS Iron Edison Batteries)

Drake drake.chamberlin at redwoodalliance.org
Mon Oct 17 06:37:39 PDT 2016


Right. Besides that, batteries  have a shelf 
life. A few years down the line, the client will 
need to replace the bank. A $10K reinvestment 
after a few years could erase any cost 
effectiveness of an off grid system. In many 
cases they could pay the extra money and hook up to the power line now.

At 11:02 AM 10/15/2016, you wrote:
>My design philosophy these days matches yours 
>100%, Allen. Because of cheap PV, and FLA 
>batteries still stuck in the 1910s. It was a 
>different story (not too many years ago!) when a 
>good deal on PV was $5 a watt.......
>
>Dan Fink
>Adjunct Professor of Solar Energy Technology, Ecotech Institute
>IREC Certified Instructor™ for:Â
>~ PV Installation Professional
>~ Small Wind Installer
>Executive Director, Buckville Energy
>NABCEP Registered Continuing Education Providersâ„¢
><tel:970.672.4342>970.672.4342
>
>Â
>
>On Fri, Oct 14, 2016 at 3:55 PM, Allan Sindelar 
><<mailto:allan at sindelarsolar.com>allan at sindelarsolar.com> wrote:
>Dana (and I'm curious if others agree),
>I used to work with 4-5 days of storage, back 
>with modules were expensive and batteries were 
>relatively cheap. As in recent years these two 
>have reversed - modules are cheap and batteries 
>are dear - my fundamental design approach has 
>changed. I now design around 2-3 days of storage 
>with a larger array, as long as there's a backup 
>generator in the system. I size to at least 100% 
>of the projected winter average daily load.
>
>The batteries recharge more quickly, including 
>on partly cloudy days between storms. They spend 
>more of their time full, thus keeping them 
>happier and giving them as much or more life, 
>even with more and deeper cycling. FLAs are 
>easier to EQ, given the hotter charge rate. And the customer spends less.
>
>You used to live in SW Colorado, a similar sunny 
>winter climate. Is it the same in Idaho where you live now?
>Allan
>Â
>
>Allan Sindelar
><mailto:allan at sindelarsolar.com>allan at sindelarsolar.com
>NABCEP Certified PV Installation Professional
>NABCEP Certified Technical Sales Professional
>New Mexico EE98J Journeyman Electrician
>Founder (Retired), Positive Energy, Inc.
><tel:505%20780-2738>505 780-2738 cell
>
>
>_______________________________________________
>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


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20161017/dc4318f5/attachment-0003.html>


More information about the RE-wrenches mailing list