Is it safe to just leave the panels in the sun without letting them convert sun energy into electricity? If connecting into the grid isn't possible you could m

Is it safe to just leave the panels in the sun without letting them convert sun energy into electricity? If connecting into the grid isn't possible you could maybe attempt to charge batteries that you then take home and use there. Would require some calculations to check if it's worth it though... Would maybe be best if it were an electric car that can feed back into the grid. Or run a desalination plant ;D