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:d...@solarwork.com> d...@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-boun...@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 al...@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:d...@solarwork.com> d...@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-boun...@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 <t...@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 Solar-Biz-new-logo-800X300 E-Mail: <mailto:t...@solar-biz.com> t...@solar-biz.com **Please note my new email - You will now be able to find me at: <mailto:t...@solar-biz.com> t...@solar-biz.com Please update your records so we don't lose touch!** Main Number: 888-826-0939 Panama Office: 507-836-5588 X 122 <tel:507-836-5588%20X%20122> Direct Toll Free: 888-503-6772 International: 575-539-2111 X 122 <tel:575-539-2111%20X%20122> SKYPE Address: thesolarbiz (e-mail first) NOTICE: Due to recent budget cuts, the rising cost of electricity, gas, and oil...plus the current state of the economy............the light at the end of the tunnel, has been turned off. It should have been solar. Confidentiality Notice: This message including any attachments is for the sole use of the intended recipient and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender and delete any copies of this message. From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dana Sent: Friday, October 14, 2016 8:56 AM To: 'RE-wrenches' <re-wrenches@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:d...@solarwork.com> d...@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" _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
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