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Brian,<br>
Could you speak a bit more to this, please? My understanding is that
the need with a string (or, I suppose, micro-) inverter and a
battery-based inverter is for a way to disconnect full batteries
from being overcharged when the grid is down and sell is disabled.
The SMA approach is to shift frequency to reduce string inverter
output. I thought that the battery-based (Outback, Magnum) approach
is to use a contactor to open string inverter AC based on voltage
(crude, but effective). <br>
<br>
So what I understand is that the PAE inverters shift frequency: do
you mean it simulates the shift that a Sunny Island would do? And if
so, why is a diversion load recommended, and how is it configured
into the system? And where can we read more about how this is
designed to work?<br>
Thank you,<br>
Allan<br>
<br>
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<font face="Times New Roman, Times, serif"><b>Allan Sindelar</b></font><br>
<small><a href="mailto:Allan@positiveenergysolar.com"><font
color="#000099" face="Times New Roman, Times, serif"><u>Allan@positiveenergysolar.com</u></font></a></small><font
face="Times New Roman, Times, serif"><br>
<span style="font-size: 10pt;">NABCEP Certified Photovoltaic
Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
<b>Positive Energy, Inc.</b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112</b><br>
<a href="http://www.positiveenergysolar.com/" target="_blank"><u>www.positiveenergysolar.com</u></a><o:p></o:p></span></font>
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<br>
On 9/2/2011 4:39 PM, Brian Faley wrote:
<blockquote
cite="mid:29F6EE1B9DE8E648A7615A315B840161C9E585@MAGNUMMAIL.MagnumEnergy.local"
type="cite">
<pre wrap="">Hi Larry,
Magnum MS PAE inverters do indeed shift the inverter output frequency
when the battery is full in order to disconnect grid-tied inverters used
in AC coupled systems. It was designed to work in conjunction with a DC
diversion load - which is recommended if the system is larger than a
couple panels.
Regards,
Brian Faley
Chief Engineer
Magnum Energy
2111 W Casino Rd
Everett, WA 98204
425-353-8833
<a class="moz-txt-link-abbreviated" href="mailto:bfaley@magnumenergy.com">bfaley@magnumenergy.com</a></pre>
</blockquote>
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