The solar sterilizer autoclave is not working at the Bulape Hospital. Why? No one knows. But that's the way it is for many miracle devices.
Most hospitals in the developed world do not use solar autoclave. It technology developed specifically for rural hospital in the bush without electricity. But it is too complex or it is not main stream technology.
The solution is to use standard technology and devices. Why not, a standard sterilizer autoclave powered by standard solar power unit. As parts or component wear out, you replace the them. The autoclave can be replaced by another autoclave. The solar power unit can be replaced by another solar power unit or a generator. Simplicity is the secret to sustainability.