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The Aquion battery claims their 2.4kWh, 48 volt stack operates from
59 to 30 volts. Many inverters have a LBCO of 1.75 Vpc (42 volts).
Depending on voltage sag, that means about half of the capacity of
the Aquion battery can't be used. Even if the outback can operate
down to 1.5 Vpc, you are still not able to use the full capacity of
the battery unless your load is less than 800 Watts. <br>
<br>
I have reviewed their technical presentation and it looks to me like
the capacity simply can't be used in the off grid environment. If
you can't use it, why do they rate it at 2.4kWh? BTW, the Voltage
vs.Energy chart on the spec sheet does not match the first chart I
posted.<br>
<img src="cid:part1.08010107.08000006@starlightsolar.com" alt=""><br>
It's great that the industry is looking at the requirements of
future battery technologies. I'm anxiously waiting for any
manufacturer that will provide better support for use and charging
Li-ion batteries. I believe it is prime for off grid and mobile use
and I, for one, am actively implementing that technology today.<br>
<br>
Larry<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 11/11/14 12:00 PM, Phil Undercuffler
wrote:<br>
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cite="mid:CAPLQxEKT22inMDOHur7J7Wwcb9NnzWKAo8RFq4kkjRhmr5kFQg@mail.gmail.com"
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<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small">Aquion
has developed a pretty interesting product and they're
continuing to improve it -- I spoke with their engineers at
SPI and they've recently figured out some updates that give
stiffer voltage profile and therefore more effective energy.
Energy density isn't their forte, but temperature and cycling
apparently are, not to mention safety and nontoxic
construction. Not bad for a box of salt water and carbon. I
also appreciate that they give detailed spec sheets with
multiple curves to help figure out performance at different
rates. It is a battery that performs best when handled low
and slow.<br>
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<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
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<div class="gmail_default" style=""><font face="arial,
helvetica, sans-serif">Aquion's spec sheets and manuals are
available on their website, you might need to register to
get access but this link hopefully should work. <a
moz-do-not-send="true"
href="http://info.aquionenergy.com/hs-fs/hub/147472/file-1917705156-pdf/1_Product_Documentation/AQ-SP-00018_A_Aquion_M100-L082_Product_Specification_Sheet.pdf">http://info.aquionenergy.com/hs-fs/hub/147472/file-1917705156-pdf/1_Product_Documentation/AQ-SP-00018_A_Aquion_M100-L082_Product_Specification_Sheet.pdf</a></font><br>
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<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
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<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small">While
with any transformer-based inverter there are hard limits
to the voltage window due to the fixed ratio, the Radian
GS8048A and GS4048A have extended adjustment windows to
better operate with new technologies like this -- we allow
you to run the DC voltage all the way to the rails if you
need to (Charge anywhere between 44-64VDC, LBCO down to
36VDC). When the voltage gets below 40-some-odd-volts the
waveform will definitely be flat-topping, but it will
work. As new battery technologies come to market that
have different requirements than lead acid, you need more
flexibility from the power electronics. We're just trying
to give you more tools to work with.</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small">Hope
this helps,</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small">
<p class="MsoNormal"><span style="color:rgb(31,73,125)">Philip
Undercuffler</span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">Director,
Strategic Platforms</span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">OutBack
Power Technologies</span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)"><a
moz-do-not-send="true" href="tel:360.618.4306"
value="+13606184306" target="_blank">360.618.4306</a>
office | <a moz-do-not-send="true"
href="tel:425.319.2821" value="+14253192821"
target="_blank">425.319.2821</a>
mobile</span></p>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
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<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
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<div class="h5">On Mon, Nov 10, 2014 at 11:29 AM, Larry
Crutcher <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:larry@starlightsolar.com"
target="_blank">larry@starlightsolar.com</a>></span>
wrote:<br>
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<div class="h5">
<div bgcolor="#FFFFFF" text="#000000"> David,<br>
<br>
Something does not add up to me. The cell has a
voltage discharge curve way outside of RE
equipment, 1.75 Vpc down to 0.5Vpc. I can't see
how this technology could be scaled to RE
applications without wasting much of the capacity.
From what I see, only about 40% could be used
before LVD.<img
src="cid:part6.05060202.07060904@starlightsolar.com"
alt="">
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<div><br>
<br>
<br>
<div>On 11/10/14 10:10 AM, Dave wrote:<br>
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<p class="MsoNormal">Wrenches,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I have a customer
with a grid-tied w battery back-up
(formerly off-grid) with failing LA
batteries. He found these batteries on
the web and asked me to check them out.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Anyone out there know
anything about this AHI technology and
or this company, Aquion Energy? <b><span
style="color:rgb(79,129,189)"><a
moz-do-not-send="true"
href="http://www.aquionenergy.com/microgrid-energy-storage"
target="_blank">http://www.aquionenergy.com/microgrid-energy-storage</a></span></b></p>
<p class="MsoNormal"><b><span
style="color:rgb(79,129,189)"> </span></b></p>
<p class="MsoNormal"><span
style="color:black">Thanks,</span> </p>
<p class="MsoNormal">David Palumbo </p>
<p class="MsoNormal">Independent Power LLC</p>
<p class="MsoNormal">462 Solar Way Drive</p>
<p class="MsoNormal">Hyde Park, VT 05655</p>
<p class="MsoNormal"><a
moz-do-not-send="true"
href="tel:802-888-7194"
value="+18028887194" target="_blank">802-888-7194</a></p>
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