That’s an exciting project choice. The solar-powered coral terrarium is expected to be part of the collective hub. Check out Dawul Wuru’s vision for the hub to ensure cohesiveness with other structures likely to be built there. Since the collective hub is not yet in place, no data is available to estimate the monthly power consumption.
I suggest zooming into the energy requirements of your proposed coral terrarium design in terms of operation and maintenance. The design brief states that it needs to be solar-powered, mobile, user-friendly and scalable. Think of the powered components that will satisfy these minimum features. I hope this helps.