[RE-wrenches] Aquion Energy

[Roland Shackelford]

Aloha All,

We have been integrating Aquion Energy batteries into select Off Grid homes
for just over a year now, with great success. The key is designing them for
what they are, and not as if they were a lead acid battery. The biggest
added design criteria is taking into consideration their power limitation's
along with energy sizing. Most lead acid batteries only needed to be
designed around energy and not power. Often, specially with Aquion first
generation S10 stacks, sizing the battery around a customers power required
a larger battery then their energy requirements.

Aquion's first generation stacks had a very high impedance, causing large
voltage swings with any thing larger then a 2 amp per stack charge or
discharge cycle. If you designed a battery matching just the energy
concerns, you would most likely run into power limitations and therefore
the batteries voltage would drop below most inverters operating window. The
first generation S10 stack, would drop down to 30V!

Aquion's third generation S20P stack is currently shipping it has a much
lower impedance allowing full capacity discharge above 40Vdc.

Their ability to have a fluctuating SOC, and not require charging to 100%
without shortening their cycle life is a major advantage over lead acid,
not to mention, being the only non hazardous battery in the world, no
maintenance and not requiring to be equalized.


Mahalo,

Roland Shackelford
NABCEP CERTIFIED PV INSTALLER
Vice President
Renewable Energy Services (RES), Inc.
45-487 Lehua St.
P.O. Box 1518
Honoka'a, HI 96727
Office:   808-775-7410
Fax:      808-775-7756
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E-Mail:  roland at renewablenergy.com
www.renewablenergy.com

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On Thu, Jul 16, 2015 at 4:27 AM, Starlight Solar Power Systems <
larry at starlightsolar.com> wrote:

> Hi Mark,
>
> There was some discussion back in November 2014 on this list. They claim
> 100% DoD but I can’t see how you can use the full capacity of the battery
> due to the broad operating voltage.
>
> Larry Crutcher
> Starlight Solar Power Systems
>
>
>
> On Jul 16, 2015, at 5:20 AM, Mark Frye <markf at berkeleysolar.com> wrote:
>
> Does anyone have any thoughts/experience with the Aquion Energy battery?
>
> Mark Frye
> Berkeley Solar Electric Systems
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