Once the geometrical relations of the reflector were established the design process started. It is difficult to divide this process into separate tasks because each particular solution strongly influences the range of the possible solutions for the whole system.

The main design challenge is how to manufacture and assemble a high precision optical device that could be easily integrated into building covers, with minimal or none on-site adjustments, maintaining manufacturing costs per square meter (or better per kWh generated) as low as possible.

To meet those requirements three elements are of critical importance:

1. The positioning system of the receiver

2. The reflector manufacturing and assembly process

3. The receiver performance.