[RE-wrenches] LiFePo4

[William Miller]

Wrenches:

 

Please disregard the email below.  It was meant as a private email.  I did
include the salient points relevant to all in a separate e-mail.

 

William

 

Gradient Cap_mini
Lic 773985
 <http://www.millersolar.com/> millersolar.com
805-438-5600

 

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
Behalf Of William Miller
Sent: Wednesday, September 17, 2014 9:15 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] LiFePo4

 

Larry:

 

I failed to paste the link in one email.  I followed up with the link below.
You may have missed the resend:

 

http://www.oesoptimizedenergystorage.com/

 

What I found is a Sunny Island mini-grid system behaving oddly.  The
generator, when started with the SI, would run for a few minutes and then
shut down.  Further investigation revealed that the SIs were indicating that
the inverters were sending lots of power back to the generator.  I don't
know if this was actually the case, nor can I grasp how this could happen.
Fortunately I reached an off-grid tech at SMA that I trust (among the many
at SMA I do not, please don't share this email.) and we were able to resolve
the issue.  I am not sure what we did but I suspect that simply rebooting
the Sunny Islands was the cure.

 

We did little to evaluate the batteries.  They did seem to hold rock solid
under loads.  I am not convinced, however, that these batteries are right
for off-grid.  The internal battery management system will allow them to
disconnect under surge loads, just when you need your batteries to stay
connected.  I will be conversing with the manufacturer to learn more about
them.

 

William

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20140917/13152ef4/attachment-0002.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 1460 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20140917/13152ef4/attachment-0002.jpg>