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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.<br>
<br>
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<p class="MsoNormal" style=""><span class="il"><b style="">Allan</b></span><b
style=""> Sindelar</b><span style="font-size: 10pt;"><br>
<a href="mailto:Allan@positiveenergysolar.com" target="_blank"><span
class="il">Allan</span>@positiveenergysolar.com</a><br>
NABCEP Certified Photovoltaic Installer<br>
EE98J Journeyman Electrician<br>
<b style="">Positive Energy, Inc.</b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b style="">505 424-1112</b><br>
<a href="http://www.positiveenergysolar.com/" target="_blank">www.positiveenergysolar.com</a></span></p>
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<br>
<br>
Phil Undercuffler wrote:
<blockquote
cite="mid:AANLkTimGl2DXVqCKc4KdsnME0CzNFgnLXA48IaawX_T1@mail.gmail.com"
type="cite">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>
<br>
<div class="gmail_quote">On Tue, May 11, 2010 at 9:58 AM, bob <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:reellison@gmail.com">reellison@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal"><font face="Calibri" size="4"><span
style="font-size: 14pt;">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></p>
<p class="MsoNormal"><font face="Calibri" size="4"><span
style="font-size: 14pt;">Here’s
the problem, the inverter will not be able to get into sleep mode at
night.</span></font></p>
<p class="MsoNormal"><font face="Calibri" size="4"><span
style="font-size: 14pt;"> </span></font></p>
<p class="MsoNormal"><font face="Calibri" size="4"><span
style="font-size: 14pt;">There
are 2 cell chargers and a “cpap” machine having to run all night.</span></font></p>
<p class="MsoNormal"><font face="Calibri" size="4"><span
style="font-size: 14pt;">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></p>
<p class="MsoNormal"><font face="Calibri" size="4"><span
style="font-size: 14pt;">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></p>
<p class="MsoNormal"><font face="Calibri" size="4"><span
style="font-size: 14pt;"> </span></font></p>
<p class="MsoNormal"><font face="Calibri" size="4"><span
style="font-size: 14pt;">Anyone
got any other ideas, or am I best to just deal with it?</span></font></p>
<p class="MsoNormal"><font face="Calibri" size="4"><span
style="font-size: 14pt;"> </span></font></p>
<p class="MsoNormal"><font face="Calibri" size="4"><span
style="font-size: 14pt;">Thanks,</span></font></p>
<p class="MsoNormal"><font face="Calibri" size="4"><span
style="font-size: 14pt;">Bob</span></font></p>
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