[RE-wrenches] Array/battery relationship (WAS Battery Watt hours FLA VS Iron Edison Batteries)
Dana
dana at solarwork.com
Fri Oct 14 15:17:24 PDT 2016
This client is on Kauai, her cloudy winter storms average 4-5 days. She has
a generator [Honda] not an auto start, that several folks have tried to
integrate as auto start with no success. Battery maintenance is a challenge
for her, as could be expected with a pile of T-105 style batteries, etc.
I can hear folks saying "well maybe she should not be off grid."
She does not have another living option & I feel just requires a minor
upgrade & correction to a poor original install.
I suggested a set of HUP Solar Ones & the freight was huge to the islands.
__________________________________________________________
Dana Orzel
Great Solar Works, Inc - NABCEP # 051112-136
<mailto:dana at solarwork.com> dana at solarwork.com -
<http://www.solarwork.com> www.solarwork.biz
O - 970.626.5253 F - 970.626.4140 c - 208.721.7003
"Responsible Technologies for Responsible People since 1988"
From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
Behalf Of Allan Sindelar
Sent: Friday, October 14, 2016 3:56 PM
To: RE-wrenches
Subject: [RE-wrenches] Array/battery relationship (WAS Battery Watt hours
FLA VS Iron Edison Batteries)
Dana (and I'm curious if others agree),
I used to work with 4-5 days of storage, back with modules were expensive
and batteries were relatively cheap. As in recent years these two have
reversed - modules are cheap and batteries are dear - my fundamental design
approach has changed. I now design around 2-3 days of storage with a larger
array, as long as there's a backup generator in the system. I size to at
least 100% of the projected winter average daily load.
The batteries recharge more quickly, including on partly cloudy days between
storms. They spend more of their time full, thus keeping them happier and
giving them as much or more life, even with more and deeper cycling. FLAs
are easier to EQ, given the hotter charge rate. And the customer spends
less.
You used to live in SW Colorado, a similar sunny winter climate. Is it the
same in Idaho where you live now?
Allan
Allan Sindelar
allan at sindelarsolar.com
NABCEP Certified PV Installation Professional
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
505 780-2738 cell
On 10/14/2016 3:36 PM, Dana wrote:
I recommend 4 days backup min & 5 days backup if budget allows of storage
and Iron Edison were saying that 2 days was sufficient. To clarify - I said
"magical" as in wondering if there was something special, I-E did not say
this.
__________________________________________________________
Dana Orzel
Great Solar Works, Inc - NABCEP # 051112-136
<mailto:dana at solarwork.com> dana at solarwork.com -
<http://www.solarwork.com> www.solarwork.biz
O - 970.626.5253 F - 970.626.4140 c - 208.721.7003
"Responsible Technologies for Responsible People since 1988"
From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
Behalf Of Dan Fink
Sent: Friday, October 14, 2016 12:04 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Battery Watt hours FLA VS Iron Edison Batteries
Tom; I have never seen Iron Edison saying NiFe is "magical" -- do you have a
specific webpage on their site that says this?
All batteries have advantages and disadvantages, and also myriad technical
issues for the installer to overcome.
Dan Fink
Adjunct Professor of Solar Energy Technology, Ecotech Institute
IREC Certified InstructorT for:
~ PV Installation Professional
~ Small Wind Installer
Executive Director, Buckville Energy
NABCEP Registered Continuing Education ProvidersT
<tel:970.672.4342> 970.672.4342
On Fri, Oct 14, 2016 at 10:14 AM, Tom Duffy <Tom at solar-biz.com> wrote:
Hi Dana
Two thoughts. how many days of autonomy are they quoting?
If nickel Iron were this magical how come nobody has noticed them for the
past 100 years?
Kind regards
Tom Duffy
Senior Solar Design Engineer
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From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
Behalf Of Dana
Sent: Friday, October 14, 2016 8:56 AM
To: 'RE-wrenches' <re-wrenches at lists.re-wrenches.org>
Subject: [RE-wrenches] Battery Watt hours FLA VS Iron Edison Batteries
Good Morning All,
I have a charity case client that needs 760 to 900 AHR at 24 VDC. I have
installed HUP Solar One Batteries for 20+ years and do not have any
experience with the Iron Edison battery. My client went to Iron Edison & was
told that 360 AHR at 24 VDC would cover the same AHR as a 760 to 900 AHR in
FLA. I understand you can use the IE deeper typically than a FLA.
Math is math to me & how I have sized [successfully for years] Is there
something I am missing or has my client been misinformed?
__________________________________________________________
Dana Orzel
Great Solar Works, Inc - NABCEP # 051112-136
<mailto:dana at solarwork.com> dana at solarwork.com -
<http://www.solarwork.com> www.solarwork.biz
O - 970.626.5253 F - 970.626.4140 c - 208.721.7003
"Responsible Technologies for Responsible People since 1988"
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