In this paper we investigate quasilinear parabolic systems of conserved Penrose-Fife type. We show maximal \(L_p\) - regularity for this problem with inhomogeneous boundary data. Furthermore we prove global existence of a solution, provided that the absolute temperature is bounded from below and above. Moreover, we apply the Lojasiewicz-Simon inequality to establish the convergence of solutions to a steady state as time tends to infinity.