<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2800.1649" name=GENERATOR></HEAD>
<BODY>
<DIV><SPAN class=311345516-13032014><FONT face=Arial color=#0000ff size=2>Hi
Mac, </FONT></SPAN></DIV>
<DIV><SPAN class=311345516-13032014><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=311345516-13032014><FONT face=Arial color=#0000ff size=2>We
fabricated and operate a similar sized (400 kWh) battery / inverter /
generator hybrid system for BC Hydro, our power utility servicing a remote
community. It has been online for 2 years now. </FONT></SPAN></DIV>
<DIV><SPAN class=311345516-13032014><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=311345516-13032014><FONT face=Arial color=#0000ff size=2>Using
Dekka / East Penn D-series batteries which we had custom built to our specs.
</FONT></SPAN></DIV>
<DIV><SPAN class=311345516-13032014><FONT face=Arial color=#0000ff
size=2></FONT></SPAN><SPAN class=311345516-13032014><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=311345516-13032014><FONT face=Arial color=#0000ff size=2>A
notable difference is we have 100 kW diesels and 60 kW inverter capacity in
a 120/208 SMA inverter config (stepped up to 14.4 kV distribution). The system
works really well and it currently 100% uptime for last 12 months. This is
an unattended system we are onsite to maintain every 2 months. No renewable
input at this time. </FONT></SPAN></DIV>
<DIV><SPAN class=311345516-13032014><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=311345516-13032014><FONT face=Arial color=#0000ff size=2>The
sizing you have reported seems out of ratio. ~ 20 kW of charging power into
a 400 kWh battery bank ie C/5. Depending on the loads the gen is carrying
along with charging that could further reduce available charge
capacity. That generator is going to have to run for a very long time to
charge that battery. We call this the big battery blunder syndrome - which
has caused many failures of such scale of system. </FONT></SPAN></DIV>
<DIV><SPAN class=311345516-13032014><FONT face=Arial color=#0000ff size=2><FONT
face=Arial size=2></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=311345516-13032014><FONT face=Arial color=#0000ff size=2><FONT
face=Arial size=2>Kevin</FONT></DIV></FONT></SPAN>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org]<B>On Behalf Of </B>Mac
Lewis<BR><B>Sent:</B> March 11, 2014 7:27 AM<BR><B>To:</B>
RE-wrenches<BR><B>Subject:</B> Re: [RE-wrenches] Huge battery bank
recommendation<BR><BR></FONT></DIV>
<DIV dir=ltr>To clarify, this is for an off-grid application, 4 Sunny Islands,
30kW generator.</DIV>
<DIV class=gmail_extra><BR><BR>
<DIV class=gmail_quote>On Tue, Mar 11, 2014 at 9:16 AM, August Goers <SPAN
dir=ltr><<A href="mailto:august@luminalt.com"
target=_blank>august@luminalt.com</A>></SPAN> wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV dir=ltr>Mac,
<DIV><BR></DIV>
<DIV>Is this for an off grid system? We're doing our first project with a
Deka Unigy II battery system but they are AGM and I believe only good for
grid tied battery backup or applications where you won't have a very deep
depth of discharge:</DIV>
<DIV><BR></DIV>
<DIV><A href="http://www.dekabatteries.com/assets/base/0919c.pdf"
target=_blank>http://www.dekabatteries.com/assets/base/0919c.pdf</A><BR></DIV>
<DIV><BR></DIV>
<DIV>Best,</DIV>
<DIV><BR></DIV>
<DIV>August</DIV></DIV>
<DIV class=gmail_extra><BR clear=all>
<DIV>
<DIV dir=ltr>
<P><B><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Century Gothic','sans-serif'">August
Goers</SPAN></B></P>
<P><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Century Gothic','sans-serif'">Principal</SPAN></P>
<P><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Century Gothic','sans-serif'">Luminalt
Energy Corporation</SPAN></P>
<P><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Century Gothic','sans-serif'">o: <A
href="tel:415.641.4000" target=_blank
value="+14156414000">415.641.4000</A></SPAN></P>
<P><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Century Gothic','sans-serif'">m: <A
href="tel:415.559.1525" target=_blank
value="+14155591525">415.559.1525</A></SPAN></P>
<P><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Century Gothic','sans-serif'"><A
href="http://www.luminalt.com" target=_blank>www.luminalt.com</A></SPAN></P>
<P> </P></DIV></DIV><BR><BR>
<DIV class=gmail_quote>
<DIV class="">On Tue, Mar 11, 2014 at 6:24 AM, Mac Lewis <SPAN
dir=ltr><<A href="mailto:maclewis1@gmail.com"
target=_blank>maclewis1@gmail.com</A>></SPAN> wrote:<BR></DIV>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV>
<DIV class=h5>
<DIV dir=ltr>Hi wrenches,
<DIV><BR></DIV>
<DIV>I am consulting on a job that requires an 8000 Ahr battery bank.
This is quite a bit beyond my normal battery bank realm. What
would you recommend for this?</DIV>
<DIV><BR></DIV>
<DIV>Thanks in advance<SPAN><FONT color=#888888><BR clear=all>
<DIV><BR></DIV>-- <BR>
<DIV><BR></DIV>
<DIV><FONT face="'times new roman', serif" color=#305a78><BR></FONT></DIV>
<DIV><BR></DIV>Mac Lewis<BR><BR><SPAN
style="FONT-SIZE: medium; COLOR: rgb(255,153,0); FONT-FAMILY: 'Times New Roman'"><B><FONT
face="Arial, Helvetica, sans-serif" size=3>
<P align=left><FONT face="Verdana, Arial, Helvetica, sans-serif"
color=#000000><SPAN style="FONT-SIZE: small"><SPAN
style="FONT-WEIGHT: normal; COLOR: rgb(48,90,120); FONT-FAMILY: arial"><FONT
face="'times new roman', serif">"Yo solo sé que no sé
nada." </FONT><SPAN
style="FONT-WEIGHT: 700; COLOR: rgb(104,104,104)"><FONT
face="'times new roman', serif">-Sócrates</FONT></SPAN></SPAN></SPAN></FONT></P></FONT></B></SPAN></FONT></SPAN></DIV></DIV><BR></DIV></DIV>
<DIV class="">_______________________________________________<BR>List
sponsored by Home Power magazine<BR><BR>List Address: <A
href="mailto:RE-wrenches@lists.re-wrenches.org"
target=_blank>RE-wrenches@lists.re-wrenches.org</A><BR><BR>Change email
address & settings:<BR><A
href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org"
target=_blank>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</A><BR><BR>List-Archive:
<A
href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org"
target=_blank>http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</A><BR><BR>List
rules & etiquette:<BR><A
href="http://www.re-wrenches.org/etiquette.htm"
target=_blank>www.re-wrenches.org/etiquette.htm</A><BR><BR>Check out
participant bios:<BR><A href="http://www.members.re-wrenches.org"
target=_blank>www.members.re-wrenches.org</A><BR><BR><BR></DIV></BLOCKQUOTE></DIV><BR></DIV><BR>_______________________________________________<BR>List
sponsored by Home Power magazine<BR><BR>List Address: <A
href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</A><BR><BR>Change
email address & settings:<BR><A
href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org"
target=_blank>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</A><BR><BR>List-Archive:
<A href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org"
target=_blank>http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</A><BR><BR>List
rules & etiquette:<BR><A href="http://www.re-wrenches.org/etiquette.htm"
target=_blank>www.re-wrenches.org/etiquette.htm</A><BR><BR>Check out
participant bios:<BR><A href="http://www.members.re-wrenches.org"
target=_blank>www.members.re-wrenches.org</A><BR><BR><BR></BLOCKQUOTE></DIV><BR><BR
clear=all>
<DIV><BR></DIV>-- <BR>
<DIV><BR></DIV>
<DIV><FONT face="'times new roman', serif" color=#305a78><BR></FONT></DIV>
<DIV><BR></DIV>Mac Lewis<BR><BR><SPAN
style="FONT-SIZE: medium; COLOR: rgb(255,153,0); FONT-FAMILY: 'Times New Roman'"><B><FONT
face="Arial, Helvetica, sans-serif" size=3>
<P align=left><FONT face="Verdana, Arial, Helvetica, sans-serif"
color=#000000><SPAN style="FONT-SIZE: small"><SPAN
style="FONT-WEIGHT: normal; COLOR: rgb(48,90,120); FONT-FAMILY: arial"><FONT
face="'times new roman', serif">"Yo solo sé que no sé nada." </FONT><SPAN
style="FONT-WEIGHT: 700; COLOR: rgb(104,104,104)"><FONT
face="'times new roman', serif">-Sócrates</FONT></SPAN></SPAN></SPAN></FONT></P></FONT></B></SPAN></DIV></BLOCKQUOTE></BODY></HTML>