The building would be carbon negative in terms of the energy that it produces is greater than the energy that it consumes. PV panels positioned on the roof of the southern wing would export energy to the national grid during the summer months. In the winter months energy would be imported when there is less sunshine.
The south facing sculpted shapes on the south face of the northern wing would have recessed evacuated solar tubes that would use water to heat a heat sink encompassed within the sculpted shape.
The stored energy would be used to heat water when the sun is not available and would be particularly useful in the colder months when the sun is not so strong.