<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>
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<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">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net">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">louis@solarcowboyz.com</a>> wrote:<br />
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<div>Looking for feedback on the following, any help would be appreciated;</div>
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<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>
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<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>
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<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>
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<div>This may be a solution that the customer would go along with short of replacing the entire system.</div>
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<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>
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