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<DIV><SPAN class=296291716-30092008>Walt,</SPAN></DIV>
<DIV><SPAN class=296291716-30092008>It seems to me that the most obvious
solution would be to use more Outback inverters, with one or more serving solely
as inverter(s) and the other(s) solely as charger(s). Then you get the
benefits of sophisticated charging algorithm, isolation for power quality,
compatibility on the Flexnet system, and component redundancy in case of partial
failure. However, I don't know for sure that it can be set up in this way; that
might take a call to Outback.</SPAN></DIV>
<DIV><SPAN class=296291716-30092008>Allan</SPAN></DIV>
<DIV><SPAN class=296291716-30092008></SPAN> </DIV>
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal>Hello all,<o:p></o:p></P>
<P class=MsoNormal>We have an application in Haiti (and some African countries
as well) where we have inverter /battery systems on a lousy (very lousy)
grids. The grid is good enough to charge batteries, but not sufficient for
sensitive electronic loads.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Therefore, the systems we are using are three Outback FX 3648
inverters. If they are connected with AC IN from the grid and the grid is
on and is lousy (but good enough to get through the voltage and frequency
limits), then this power will be passed on to the computers. (The reality
is that we have to open the voltage window too wide to let the grid in at all,
and thus unacceptable to the electronics.) So, we DO NOT connect the AC IN
to the inverters. In other words, the FX units become inverters only, and
never pass AC current from the grid to the loads. (This is what we are
calling “no contact” system – similar to a double conversion UPS
system.)<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>So – we need to add separate battery charging to the battery
bank that will put in roughly equal amphours to what we feel the daily usage
will be during the day.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>The load is about 8000 watts, which might translate to 140 to
170 amps of discharging. We might not have to put in the full amount of
charge, since our charging can continue in the night hours when the load is not
discharging, but we should probably try to charge the batteries at around 100 to
140 Amps DC (48V).<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Does anyone have a recommendation as to the type of charger
that might work best for this, either bulk, or smart, or a combination?
OR……other suggestions for this system that I am just missing??<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>We would plan to monitor this system by using the FlexNET DC
system, adding a DC shunt on the negatives of the feed going from the charger TO
the batteries.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Thanks,<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Walt<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Walt
Ratterman<o:p></o:p></SPAN></B></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">SunEnergy Power
International</SPAN></B><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman','serif'"><o:p></o:p></SPAN></B></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman','serif'"><o:p> </o:p></SPAN></B></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Arial','sans-serif'">11 Laurel Lane
South Washougal, WA
98671<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Arial','sans-serif'">(360)-837-3680
▪ fax (360)-837-1315 ▪ Skype
Walt-Mobile<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Arial','sans-serif'"><A
href="mailto:wratterman@SunEPI.org"><SPAN
style="COLOR: blue">wratterman@SunEPI.org</SPAN></A> </SPAN><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"> </SPAN><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Arial','sans-serif'">▪ <A
href="http://www.sunepi.org/"><SPAN
style="COLOR: blue">www.SunEPI.org</SPAN></A><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
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<P class=MsoNormal><SPAN
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<P class=MsoNormal><o:p> </o:p></P></DIV><BR><BR>__________ Information
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