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<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>48 volts
is a consideration and I have done many, but the problem is still the 26 AC watt
load and the inverters efficiency at that light a load. Just hate to burn that
much DC to generate that little AC. I am unsure if it is better at 48 volts or
not.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>Maybe I
should not sweat it but it just bugs me. It probably comes from years of
looking at “E meters” and playing with loads. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>Bob<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></font></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;
font-weight:bold'>From:</span></font></b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Allan Sindelar<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, May 12, 2010 2:09
AM<br>
<b><span style='font-weight:bold'>To:</span></b> RE-wrenches<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [RE-wrenches] Tiny
load problem<o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>Bob,<br>
If I step back and look at your question, another bigger question comes up: if
you are designing a system with two inverters in order to double charging
current, you must have a pretty good sized battery bank. In general, I would
suggest that you look at a 48V system, rather than 24V, once it gets to that
size. Equivalent charging rate, but smaller wire, lower component amperage
requirements and fewer battery strings to get the capacity you're apparently
looking for.<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><span class=il><b><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;font-weight:bold'>Allan</span></font></b></span><b><span
style='font-weight:bold'> Sindelar</span></b><font size=2><span
style='font-size:10.0pt'><br>
<a href="mailto:Allan@positiveenergysolar.com" target="_blank"><span class=il><u>Allan</u></span><u>@positiveenergysolar.com</u></a><br>
NABCEP Certified Photovoltaic Installer<br>
EE98J Journeyman Electrician<br>
<b><span style='font-weight:bold'>Positive Energy, Inc.</span></b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b><span style='font-weight:bold'>505 424-1112</span></b><br>
<a href="http://www.positiveenergysolar.com/" target="_blank"><u>www.positiveenergysolar.com</u></a></span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
Phil Undercuffler wrote: <o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>If the normal connected
loads are within the capacity of a single inverter (which may actually be
possible -- I run my whole house off one Outback FX2024, microwave, dishwasher,
washing machine and all) then you can just leave one of the inverters in sleep
mode or disable output but leave input/charging enabled. <br>
<br>
Which inverters are you planning on using for the generator charging?
Depending upon which brand or how sophisticated you want to be, there are a
couple ways to skin this cat. Easiest and cheapest is to simply not
connect up any AC output wiring or stacking cables to the second inverter, and
program it to stay asleep and charge only when it sees AC input power. <br>
<br>
I used to be religious about making sure my inverter was asleep, and even had a
second baby inverter to power a handful of full time or sensitive loads.
However, it got difficult trying to explain why you couldn't just plug the
vacuum cleaner into just-any-old-outlet, and as my electronic widget count
expanded it became less and less advantageous to have that baby inverter.<br>
<br clear=all>
Phil Undercuffler<br>
Conergy<br>
<br>
<br>
<br>
<br>
<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>On Tue, May 11, 2010 at 9:58 AM, bob <<a
href="mailto:reellison@gmail.com"><u>reellison@gmail.com</u></a>> wrote:<o:p></o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>I am sizing a
system that will have dual inverters to shorten generator charging in the
winter and enough solar to charge the rest of the time. </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>Here’s the
problem, the inverter will not be able to get into sleep mode at night.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif"'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>There are 2 cell
chargers and a “cpap” machine having to run all night.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>It only totals 26
watts, has anyone found a better way to do this without having to keep an
inverter awake to produce 26 watts?</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>I would like to
dedicate a Morningstar 300 watt inverter for the job but the system is 24 volts
and Morningstar has no plans to make one in 24 volts.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif"'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>Anyone got any
other ideas, or am I best to just deal with it?</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif"'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>Thanks,</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif"'>Bob</span></font><o:p></o:p></p>
</div>
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