A solar heater with a primary circuit course in a panel for heating two separate inter connected storage reservoirs. The cloud server system may further include a control module configured to act as a docking station interfacing with the internet for the at least one computer module so that the at least one computer module is hot swappable, and a plurality of fans. The method includes utilization of a unique physical model representing all main physical processes taking place during laser-assisted material deposition, a corresponding mathematical model consisting of equations describing the relevant physical processes, and a computer code used for numerical calculations of the parameters of interest according to the mathematical model. The present invention provides an aromatic polyester amide comprising the following repeating units -: .