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<p>The Midnite Solar Classic Controller used to be able to be
positive grounded. The Classic 250 can do five 60 cell modules in
series.<br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 10/14/20 3:18 PM, Dave Angelini
Offgrid Solar wrote:<br>
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<p>I got around this for a client by adding an XW and the high
voltage MPPT. It has a positive ground option and it worked
well. Scheider now has a 100a Mppt version BTW. Pretty easy way
to solve it and add batteries. Use a Radian also if the FM100
can be negative grounded.</p>
<div>
<pre> </pre>
<pre><strong><span style="font-size: small;">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" target="_blank" moz-do-not-send="true">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" moz-do-not-send="true">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
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<div><br>
<br>
On Wednesday, October 14, 2020, <<a
href="mailto:louis@solarcowboyz.com"
moz-do-not-send="true">louis@solarcowboyz.com</a>>
wrote:<br>
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border-left: 1px #ccc solid; padding-left: 1ex;">
<div>
<div>Looking for feedback on the following, any help
would be appreciated;</div>
<div> </div>
<div>Positive grounded arrays(Sunpower systems) what is
being used as an Inverter replacement?</div>
<div>Hard to get SMA's SBxxxxUS older style units that
have the built-in POS/NEG grounding capability...</div>
<div>As far as I know the newer line of Inverters from
SMA will not work ; they are TL's and are not
compatible.</div>
<div> </div>
<div>It would be tempting to "Un-Ground" the array and
use the newer line of TL Inverters from SMA.</div>
<div>The Discon would need to do both POS/NEG lines;OK</div>
<div>I know of this being done with Arrays that are NEG
grounded.</div>
<div> </div>
<div>How much of a Power loss from the array would be
expected due to removing the POS ground on Sunpower
panels and run them Un-grounded ?</div>
<div>Guessing say 15 to 20% ?</div>
<div> </div>
<div>This may be a solution that the customer would go
along with short of replacing the entire system.</div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div>Best Regards</div>
<div>Louis Segarra </div>
<div>Tech Department/Field Operations</div>
<div>Solar Cowboyz</div>
<div>(530) 273-4895</div>
<div>(916) 212-0282</div>
</div>
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