-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Larry Crutcher,
Starlight Solar Power Systems
Sent: Wednesday, August 24, 2011 12:54 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up
Hi John,
Current is not reduced "due to"
Hi John,
Current is not reduced "due to" the PWM or the MPPT process ass you described.
Current is reduced as a function of the electro-chemical process causing the
internal resistance to increase as the cells reach full absorption. The PWM
regulation only controls voltage. MPPT is only convert
: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Darryl Thayer
Sent: Wednesday, August 24, 2011 10:44 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up
One of the advantages of LiFeP is the fast rechange
ay, August 23, 2011 5:31 PM
Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up
I 2nd what Ray Waters is saying. Much too soon, BMS will be an insane
challenge, we rarely care about weight and footprint like the EV's do.
Returning defective cells to China IF they accept res
with. Lead
carbon? Ni Magnisum Cobalt?
From: Jeff Oldham
To: re-wrenches@lists.re-wrenches.org
Sent: Tuesday, August 23, 2011 5:31 PM
Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up
I 2nd what Ray Waters is saying. Much too soon, BMS will be an insane
challenge, we rarely
I 2nd what Ray Waters is saying. Much too soon, BMS will be an insane
challenge, we rarely care about weight and footprint like the EV's do.
Returning defective cells to China IF they accept responsibility for the
failure - I don't think so!! Sex appeal is overwhelming good judgement, one of
th
Hi Dave,
We've been doing some work in this field - all of which is preliminary
at this time. By no means would I consider myself an expert but a few
things I have garnered over the past couple of years.
1) Most Iron Phosphate (jelly roll or prismatic) are relatively low
capacity resulting in
enches'
*Sent:* Sunday, August 21, 2011 8:14 PM
*Subject:* Re: [RE-wrenches] Lithium Ion Phosphate for grid back up
We have a potential client for a net metered PV with battery backup
system with a serious interest in using lithium ion storage batteries.
I do not know of any systems th
.
The Li batteries no maintenance, 3000 to 5000 deep cycles, I want them, but I
can't afford
Darryl
From: Dave Palumbo
To: 'RE-wrenches'
Sent: Sunday, August 21, 2011 8:14 PM
Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up
We have a potential client for a
Dave;
The way modern high-performance electric vehicle manufacturers are able
to wrest such awesome performance out of Lithium batteries of any type
is by using extremely sophisticated battery management systems (BMS).
Per-string and per-cell monitoring *and* control is not uncommon, and
temp
We have a potential client for a net metered PV with battery backup system
with a serious interest in using lithium ion storage batteries. I do not
know of any systems that have used these batteries yet. From some quick
calcs I come up with 105 LiFEYPo4 3.2 volt cells. 7 strings of 15 cells for
700
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