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<p>I've AC coupled off grid with the Sunny Island, but I haven't
tried it with Solar Edge. Can you adjust the Solar Edge coupling
window to outside the IEEE set points? We used to have set all GT
inverters in Hawaii wider, because the utility wanted them to stay
on longer in a brown out. <br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 7/25/19 5:55 AM, Howie Michaelson
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAHMeMs=Og2B73KXWhj_N9zWZ8O7Gf56pNVR_=8e5jgX3PDAO+A@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<div>Hi Ray,</div>
<div>I get the issues with AC coupling. However, this system
already has a 3+ kW DC coupled array, the new array is close
to 200' away, and it would take 2 more charge controllers of
any of high voltage ones for this size array. <br>
</div>
<div>Are there any battery based inverters that folks have had
decent luck with AC coupling in an off-grid environment? (My
preference would be the XW+).<br>
</div>
<div>Thanks,</div>
<div>Howie<br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Jul 25, 2019 at 1:43
AM Ray <<a href="mailto:ray@solarray.com"
moz-do-not-send="true">ray@solarray.com</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>I do not recommend AC coupling for off grid, except to
offset daytime loads or to add PV at remote buildings.
Besides coupling errors like you're experiencing, the
entire system will shut down and not recharge, if the VFX
inverters shut down. With a DC coupled array, the
batteries can recharge, even if the inverters have shut
down for low voltage, over load, etc. At least when
someone comes to reset it, the battery won't be dead too.
The 3rd reason, as you've found, SE and other GT manus,
don't want to deal with off grid. <br>
</p>
<p>There are higher voltage, higher capacity Charge
controllers available now, like the FM100, and Magnum PT
100 that could almost handle that array with one
controller. The PT 100 will work with Midnite's SOB rapid
disconnect system. <br>
</p>
<p><br>
</p>
<pre class="gmail-m_-6633421897220390049moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="gmail-m_-6633421897220390049moz-cite-prefix">On
7/24/19 11:03 PM, Howie Michaelson wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>sorry, prematurely emailed previous post:</div>
<div><br>
</div>
<div>I'm wondering if the VFXs are just not capable of
putting out clean enough power in order to hold the SE
HD inverter. I had it operating on this same system
for a couple of hours with not this problem. Is it
likely that this inverter combo is not going to work
consistently? Will it make sense to use a different
battery inverter (XW+6848 or Radian)? What has folks
experience been in similar off-grid AC coupled SE
systems?</div>
<div>As always, thanks in advance for any thoughts.</div>
<div><br>
</div>
<div>Best,</div>
<div>Howie<br>
</div>
</div>
<br>
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