A hydraulic system with oil system, pump and valves are influencing losses and efficiencies in the system;
Ptot = Σi(PU + F * mean(c1,U+F) * (c2i,U + F)) + Σi(PB * mean(c1,B) * (c2i,B)) + Σi(PS * mean(c1,S) * (c2i,S))