Solar glossary
Usable roof area: what it means and why it matters
The part of a roof that can carry panels once orientation, shading, setbacks and obstacles are removed.
Why it matters in Nigeria
It sets the hard ceiling on system size. A large footprint with little usable area cannot host the system its bills would justify.
How PureWatts measures it
Total Usable roof
sum_usable_roof_m2
Sum over the buildings in the group. Roof area available for panels after setbacks.
Sum over the buildings in the group.
Total Footprint
sum_footprint_m2
Sum over the buildings in the group. Building footprint.
Sum over the buildings in the group.
Total Roof capacity
sum_roof_capacity_kwp
Sum over the buildings in the group. Largest system the roof can host.
Sum over the buildings in the group.
See these numbers for your area
Every state and local government area page reports usable roof area for its own rooftops. Browse the Nigeria rooftop solar data.