<div dir="ltr"><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">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>
<fieldset class="gmail-m_-6633421897220390049mimeAttachmentHeader"></fieldset>
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