I usually shoot for no more than 2-3 days autonomy time, no matter what type of battery bank. Every off-grid home system requires a backup generator anyway.
The only things magical in a positive way IMO about NiFe is that they don't sulfate and therefore have a long life, can be stored for long periods of time without charging, and that you can add more battery bank capacity years down the road if needed. I'm very happy with mine, but there was a learning curve and reprogramming of chargers and controllers to NiFe's odd charge/discharge curve. They are very different animals than lead-acid. I am also glad I used my home office as the guinea pig for NiFe (1.5 years now) before even trying to recommend them to a client....they are not for off-grid newbies (but at least the newbies wouldn't actually ruin them unless they don't keep the electrolyte level up). Let those folks burn through a set of golf cart batteries or a set of L-16s, and then let's talk NiFe....after they observe and understand what's really going on with their energy usage and energy input for awhile. Dan Fink Adjunct Professor of Solar Energy Technology, Ecotech Institute IREC Certified Instructor™ for: ~ PV Installation Professional ~ Small Wind Installer Executive Director, Buckville Energy NABCEP Registered Continuing Education Providers™ 970.672.4342 On Fri, Oct 14, 2016 at 3:36 PM, Dana <d...@solarwork.com> 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 > > d...@solarwork.com - www.solarwork.biz <http://www.solarwork.com> > > *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 Instructor™ for: > > ~ PV Installation Professional > > ~ Small Wind Installer > > Executive Director, Buckville Energy > > NABCEP Registered Continuing Education Providers™ > 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* > > [image: Solar-Biz-new-logo-800X300] > > *E-Mail: **t...@solar-biz.com <t...@solar-biz.com>* > > ***Please note my new email – You will now be able to find me at: > **t...@solar-biz.com > <t...@solar-biz.com> Please update your records so we don’t lose touch!*** > > *Main Number: **888-826-0939 <888-826-0939>* > > *Panama Office: **507-836-5588 X 122 <507-836-5588%20X%20122>* > > *Direct Toll Free:* *888-503-6772 <888-503-6772>* > > *International: **575-539-2111 X 122 <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 > > d...@solarwork.com - www.solarwork.biz <http://www.solarwork.com> > > *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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