A number of years ago SunPower switched to using a new cell that does NOT require positive grounding.
So there should be no problem in using that 327 as described. Marco On Saturday, January 20, 2018, Mac Lewis <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* >
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