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<p>The transformer balances the legs, each leg being fed by a
separate inverter. We're not in disagreement.</p>
<p>The stacking mode I described is if he didn't use the T former.
I prefer the non T former set up, as I've seen several cases were
the master inverter was over worked, and had to be rebuilt and/ or
have its fan replaced within 5 to 8 years. <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 8:45 AM, Jay wrote:<br>
</div>
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cite="mid:D800B293-F3F7-4C23-A65A-F7E21390B226@gmail.com">
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<div dir="ltr">Hi Ray,</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">I am going to disagree with you. </div>
<div dir="ltr">The transformer in OB stacking mode balances the
inverter outputs and allows out of balance phase power.
Depending on how you set the power save mode it\u2019ll use master
then trigger slave to turn on about 1000 watts. But you could
have 2000 watts on leg 1 with each inverter doing 1000 watts. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">As to the mode, you need OB stacking, not classic
stacking for the use of the balancing transformer. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Jay</div>
<div dir="ltr"><br>
</div>
<div dir="ltr"><br>
On Jul 24, 2019, at 9:43 PM, Ray <<a
href="mailto:ray@solarray.com" moz-do-not-send="true">ray@solarray.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div dir="ltr">
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charset=UTF-8">
<p>The transformer is just to balance the legs, and isn't
necessary to run the heat pump with 2 inverters. On the
programming, port 1 should be <i>stack </i><i>1-2 ph
Master</i>, and then set port 2 to <i>Classic slave.</i>
<br>
</p>
<p>BTW, we as an industry should move far away from this
archaic and offensive labeling. Master? Slave? My
daughter heard me mention that the other day and was
mortified, as all of us should be too. Gentlefolks, it's
time for some 21st Century solar Vocabulary.<br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 7/24/19 6:08 PM, David Palumbo
wrote:<br>
</div>
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<p class="MsoNormal">I apologize for my ignorance on this
issue, but in all my years I have never had to power a
230V load with an OutBack system before. </p>
<p class="MsoNormal">A couple of quick questions. It is a
8 year old OutBack system with two FX2524T\u2019s presently
powering two 120Vac legs with no 240Vac output.<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph"
style="margin-left:0in;mso-list:l0 level1 lfo1">Homeowner
is adding a Fujitsu mini split heat pump for air
conditioning the home (summers are getting hot enough
for AC even in northern Vermont). <o:p></o:p></li>
<li class="MsoListParagraph"
style="margin-left:0in;mso-list:l0 level1 lfo1">It
uses 7.9 Amps @ 230Vac <o:p></o:p></li>
<li class="MsoListParagraph"
style="margin-left:0in;mso-list:l0 level1 lfo1">I have
a OB PSX-240 Autoformer manufactured in 2008 in my
inventory here. Should I use it for this application?<o:p></o:p></li>
<li class="MsoListParagraph"
style="margin-left:0in;mso-list:l0 level1 lfo1">Do I
wire it up just like in this schematic?<o:p></o:p></li>
<li class="MsoListParagraph"
style="margin-left:0in;mso-list:l0 level1 lfo1">If so,
what do I change in the programing on the Mate?
Presently it is ADV/FX/STACK stack 1-2ph Master. Do I
simply change it to ADV/FX/STACK stack Classic
Slave?<o:p></o:p></li>
</ul>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Dave Palumbo, Independent Power, Hyde
Park, VT<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img
style="width:7.3916in;height:5.5416in"
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alt="cid:image003.jpg@01D54135.D30AA520"
moz-do-not-send="true" width="710" height="532"></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sent from <a
href="https://go.microsoft.com/fwlink/?LinkId=550986"
moz-do-not-send="true">Mail</a> for Windows 10</p>
<p class="MsoNormal"><o:p> </o:p></p>
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