Assertion: solar panel's cell | /r/HasProperty | expensive
Facets:
value: per unit area
type: OTHER
value: quite
type: DEGREE
Source sentences:
text: Photovoltaic cells (PV) which can convert solar radiation directly into electricity are quite expensive per unit area.
text: One of the reasons monocrystalline cells are so expensive is that the four sided cutting process ends up wasting a lot of silicon, sometimes more than half.