HI Mac, Sunpower used to have a white paper that showed positive ground was only needed above a certain voltage. Like 200v+ from memory.
I don’t know if these particular modules would fall into that category. jay peltz power > On Jan 20, 2018, at 9:59 AM, Jerry Shafer <jerrysgarag...@gmail.com> wrote: > > Mac > I have used the sunpower 318 on trailers with the outback charge controller > FM-60, which was wired for positive ground. However this was the only power > on board, did not have any issues when connected to the truck or via the > outback PS 2 except when I connected the laptop to the Mate 3 and had it > plugged it to the inverter power, this would pop the GFI, I used an optical > interface to prevent this from happening. I will say the Outback is more > expensive then the panel so it may not be worth it. > Jerry > > On Sat, Jan 20, 2018 at 3:43 AM, Mac Lewis <maclew...@gmail.com > <mailto:maclew...@gmail.com>> wrote: > Hi Wrenches, > > I have a buddy that would like to use a leftover SunPower E20-327-C-AC, panel > on his RV. Obviously he would need to take the inverter off. What I'm not > sure of is if this panel can operate in an ungrounded configuration, or > negative ground or does this still need a positive ground? If it does need a > positive ground, are there any decent MPPT charge controllers that are fully > isolated from PV to battery side, that would allow PV + ground and Battery - > ground? > > Thanks > > -- > > > > Mac Lewis > > "Yo solo sé que no sé nada." -Sócrates > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > <mailto:RE-wrenches@lists.re-wrenches.org> > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > <http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html> > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm <http://www.re-wrenches.org/etiquette.htm> > > Check out or update participant bios: > www.members.re-wrenches.org <http://www.members.re-wrenches.org/> > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
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