internal_id[1] = 1: Rooftop Solar, Mainly South-facing Modules
internal_id[1] = 2: Rooftop Solar, Even Distribution of Modules Oriented to the East, West and South
internal_id[1] = 3: Rooftop Solar, Mainly East and West Oriented Modules
internal_id[1] = 4: Offsite Solar, South-facing Modules