<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>We have several older-than-10-year installs with SunPower positively grounded modules and inverters that have failed. The inverters were branded by SunPower but made by various vendors like PVPowered and Xantrex that aren't around any more. </div><div>We know if a negative grounded inverter is used with these SunPower
modules they gather some parasitic charge that inhibits
normal current flow. </div><div>I have a few used inverters with negative ground that look like they can be modified to positive ground, with the risk there is some internal software that cannot be adjusted. </div><div>It looks like a Fronius IG can be changed over with a software adjustment that is actually in the manual. </div><div>What I'm wondering is whether a new ungrounded inverter can be used with these SunPower modules and keep them operating normally. </div><div>Does anyone have some pertinent experience with this?</div><div>Thanks</div><div>Don Barch<br></div><div><br></div><div><br></div></span></body></html>