Mike 134
Solar Enthusiast
Keep in mind PV wire is nothing more than plain old RHH wire. But like others said once you're in conduit THWN will work just fine.
Encore Wire Corporation
Type Photovoltaic / RHH / RHW-2 is suitable for outdoor rooftop PV source and output circuits without raceways and for use in raceways installed underground in wet locations, and
www.encorewire.com