<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">The issue is during switching only. During inverter operation everything is silky smooth. During generator operation things are mostly smooth, but large loads that come on or off during heavy charging can cause some surging, but that is more a function of a junky generator (which was just replaced with a better unit).</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">So the natural conclusion by the client is let's just run on battery/inverter all the time. And it does make sense. And it's his money.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><table border="0" cellpadding="0" cellspacing="0" style="font-family:"helvetica neue",helvetica,arial,sans-serif"><tbody><tr><td rowspan="2"><a href="https://mailtrack.io/trace/link/dc9d2bf1a6ed3ab2028d0191fb091d7f7b046263?url=http%3A%2F%2Fwww.floridasolardesigngroup.com%2F&userId=1613865&signature=c26b4cee42f4b8bf" target="_blank"><img alt="" src="https://i.imgur.com/UDMAhMR.png" style="padding-right:10px;width:100px;height:100px"></a></td><td rowspan="2"><table border="0" cellpadding="0" cellspacing="0" style="border-left-width:1px;border-left-style:solid;border-left-color:rgb(237,237,237);color:rgb(85,85,85);font-size:13px;padding-left:10px"><tbody><tr><td style="font-size:14px;color:rgb(51,51,51)"><strong>Jason Szumlanski</strong></td></tr><tr><td style="color:rgb(51,51,51)">Principal Solar Designer | Florida Solar Design Group</td></tr><tr><td colspan="1"><table border="0" cellpadding="0" cellspacing="0" style="line-height:18px;padding-top:5px"><tbody><tr><td style="padding-right:5px"><img alt="" src="https://i.imgur.com/Qq3VCBA.png" style="width:13px;height:13px"></td><td style="padding-right:5px"><a href="tel:(239)+491-8010" style="color:rgb(85,85,85)" target="_blank">(239) 491-8010</a></td><td style="padding-right:5px"><img alt="" src="https://i.imgur.com/CyWZJyo.png" style="width:13px;height:13px"></td><td><a style="color:rgb(85,85,85)">(239) 410-4985</a></td></tr><tr><td style="padding-right:5px"><img alt="" src="https://i.imgur.com/l7Y5iqe.png" style="width:13px;height:13px"></td><td colspan="3" rowspan="1" style="padding-right:5px"><a href="https://mailtrack.io/trace/link/464d6a4b34062e0cbcfd59d1f4a207c11a2d53b7?url=http%3A%2F%2Fwww.FloridaSolarDesignGroup.com&userId=1613865&signature=16e1359b785e0007" style="color:rgb(85,85,85)" target="_blank">www.FloridaSolarDesignGroup.com</a></td></tr></tbody></table></td></tr><tr><td colspan="1"><table border="0" cellpadding="0" cellspacing="0" style="padding-top:5px"><tbody><tr><td style="padding-right:5px"><a href="https://mailtrack.io/trace/link/38ee09c99b0ee769df9018eb52064a2c08fe278d?url=https%3A%2F%2Fwww.facebook.com%2Ffloridasolardesigngroup&userId=1613865&signature=8df3f0a92f6bc4ae" target="_blank"><img alt="Facebook" src="https://i.imgur.com/WQQ7oax.png" style="width:20px;height:20px"></a></td><td style="padding-right:5px"><a href="https://mailtrack.io/trace/link/edb92861accc03f7644281408fa3391d8a074349?url=https%3A%2F%2Ftwitter.com%2FFloridaSolarDG&userId=1613865&signature=312d2a620b1390ac" target="_blank"><img alt="Twitter" src="https://i.imgur.com/165gErD.png" style="width:20px;height:20px"></a></td><td style="padding-right:5px"><a href="https://mailtrack.io/trace/link/eed1c529ac3a8ee695b595899cb22ae6f30ed648?url=https%3A%2F%2Fwww.youtube.com%2Fchannel%2FUCjnsYt5r7DNJD3ZnqI10j8g&userId=1613865&signature=cd4b0a1c5dd743d5" target="_blank"><img alt="Youtube" src="https://i.imgur.com/aiz22xL.png" style="width:20px;height:20px"></a></td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table><b><div style="text-align:center"><br></div></b></div></div></div></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 21, 2020 at 2:29 PM 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>
<p>Are you sure its just the transfer switching causing problems?
I've seen quite a bit of lights dimming, flickering, and
strangeness with XW inverters ( and many others) just in normal
operation. Certain LEDs are particularly sensitive, just another
appliance coming on can cause noticeable flicker that bothers some
clients. Our solution was to try different brands of LEDs till we
found ones that had less trouble. I recall the Phillips ones
being good, but you would have to test a few to see. <br>
</p>
<pre cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div>On 4/21/20 12:26 PM, Jason Szumlanski
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">
<div style="font-family:arial,helvetica,sans-serif">I have not
looked into that, but the problem also exists
transferring from inverter to generator. The owner wants
"clean" power all the time, and just keeping him on inverter
power all the time would be a solution. </div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div>
<div dir="ltr">
<div dir="ltr">
<div>
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr"><b>
<div style="text-align:center"><br>
</div>
</b></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Apr 21, 2020 at 9:35
AM Tump <<a href="mailto:tump@swnl.net" target="_blank">tump@swnl.net</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>Have you shortened
the transfer time from gen to inv, voltage \u201ccut
out"acceptance of the gen in power instead of their 90Vac
to say 110V/L ? Raising the output voltage on the 6848s
& gen set for VD/voltage sag issues under heavy
loading? Watch this as sometimes under heavy loading it
will cut the AC input. I use the config tool to address
this kind of issue, gives me a bit more control.
<div> I have a client that has a large external battery
charger similar to a fork truck unit that he alleges
causes "dirty power" while the genset is supplying power
to the charger, w/o charging thru the inverters.
Unfortunately w/ the virus I have yet to confirm.
<div>
<div>
<blockquote type="cite">
<div>On Apr 21, 2020, at 8:27 AM, Jason Szumlanski
<<a href="mailto:jason@floridasolardesigngroup.com" target="_blank">jason@floridasolardesigngroup.com</a>>
wrote:</div>
<br>
<div>
<div dir="ltr">
<div dir="ltr">
<div style="font-family:arial,helvetica,sans-serif">I
actually need 400Adc at 51V nominal of
total charge rate. I was hoping to use
100Adc chargers for redundancy, or some
combination of 2-8 chargers to reach the
needed current, assuming they can be
synced up. I don't think the charging
algorithm needs to be complicated. We are
basically bulk charging the LiPOs to 80%
with the battery BMS controlling the
generator. The concept is to get to 80%
sometime in the night and solar kicks in
during the day to reach 100% using 2-stage
charging from the XW charge controllers.</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">The
problem I have is the quad XW6048s in the
system run at a pretty good load
typically... often over 50%. This is
off-grid with generator backup. The
transfer switches in the XW6048 are
causing surges and brownouts when the
switched loads are high, especially smart
dimmers and televisions. I need seamless
power for this client. My thought is to
abandon the internal chargers in the
XW6048s and just run loads off inverter
power full-time. I would charge the
batteries with external battery chargers.
The tricky part is how to adjust the
charge rate based on load, and also based
on solar input. I need to limit the net
charging current. Of course, I still need
400Adc of charging current, which I'm
learning might be hard to find. I don't
really want to buy four more XWs - that's
a pretty expensive solution. </div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div style="font-family:arial,helvetica,sans-serif">Jason
Szumlanski</div>
<div style="font-family:arial,helvetica,sans-serif">Florida
Solar Design Group</div>
<div style="font-family:arial,helvetica,sans-serif"><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri,
Apr 17, 2020 at 4:26 PM Dave Angelini
Offgrid Solar <<a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</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">
<p>I use the CSW 4048. It has a 50 amp
charger. A good spare for clients. Get 2
of them. Repurpose an old Radian or XW
well over 100A. XW+ is 140adc.</p>
<p><strong><span style="font-size:small">Dave
Angelini Offgrid Solar</span></strong></p>
<div>
<pre><strong><span style="font-size:small">"we go where powerlines don't"
<a href="https://mailtrack.io/trace/link/a4fb06ca4c0cde2d34822785976288dedc265ed3?url=http%3A%2F%2Fmembers.sti.net%2Foffgridsolar%2F&userId=1613865&signature=555a2c578afe741d" target="_blank">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
</div>
<p>On Fri, 17 Apr 2020 14:21:14 -0400,
Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" target="_blank">jason@floridasolardesigngroup.com</a>>
wrote:</p>
<blockquote type="cite" style="padding-left:5px;border-left:2px solid rgb(16,16,255);margin-left:5px;width:100%">
<div dir="auto">I'm looking for a
standalone 51V nominal battery charger
suitable for a LiPO battery with
2-stage charging and adjustable
setpoints for max current and battery
voltage. It would require dual
chargers with 100A capacity (I want
dual chargers for redundancy so I have
at least 50% capacity if one goes
bad). Ideally they would sync up so
they change stages simultaneously, but
I'm not sure if that's really
important.
<div dir="auto">
<div dir="auto"> </div>
<div dir="auto">Who makes something
like that?</div>
<div dir="auto"> </div>
<div dir="auto">Jason Szumlanski</div>
<div dir="auto"> </div>
<div dir="auto"> </div>
</div>
</div>
</blockquote>
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<div><span><b><a>Tump@swnl.net</a></b><span style="font:12px Arial"> </span>
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<div><span style="color:rgb(45,44,250)"><b><i>
</i></b></span><b><i>Blair
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<p><span style="color:rgb(0,0,0)"><b><i> ******** MAINE'S CHARTER
********<br>
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