Is there an online solar calculator that factors in topography?

[S610]

Looking to buy land in a hilly region (Ozarks). Is there an online solar calculator that can provide sunlight hours based on GPS coordinates?

I am buying land out of state remotely so I can't actually visit the site. Some nice lots have an uphill grade on the south side which means solar will be limited but I would like to figure out by how much.

 

[Aridom82]

I know this one

JRC Photovoltaic Geographical Information System (PVGIS) - European Commission

Photovoltaic Geographical Information System (PVGIS)

re.jrc.ec.europa.eu