[RE-wrenches] LiFePo4
William Miller
william at millersolar.com
Wed Sep 17 21:15:17 PDT 2014
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
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 Starlight Solar Power Systems
Sent: Wednesday, September 17, 2014 4:06 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] LiFePo4
William,
What did you find at the site? I did not see any attachment or link in your
email so let me know what you are working on. Do you have any questions
about the batteries/system?
Larry
On Sep 16, 2014, at 12:31 AM, William Miller <william at millersolar.com>
wrote:
Friends:
Here are the specific batteries I am looking at:
William
<image002.jpg>
Lic 773985
millersolar.com <http://www.millersolar.com/>
805-438-5600
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