The excited states Of it structurally well-determined photosystern 11 (PSII) reaction center are Obtained using all effective Hamiltonian for the interaction between the Q(y) states. The latter are calculated using the time-dependent density functional theory (DFT) method in DFT-optimized geometries, but with conserved side group orientations. Of particular importance is the orientation of the vinyl group of ring 1. Couplings are calculated using actual transition charge distributions via the INDO/S model. Good agreement with experimental spectra is obtained. The lowest excited state is mainly located oil the inactive B-side, but with a large component on P-A too, making charge separation to HA possible at low temperature. The "trap state" and triplet state are localized on the inactive B-side. Since the spin singlet Q(A) states of the reaction center are all within a rather small energy range, the state with the highest component of B-A*, on the blue side of the Q(A) absorption, has a rather high Boltzmann population at room temperature. The charge-transfer states, however, have a rather large spread and cannot be calculated accurately at present. The orientation of the phytyl chains is important and has its it consequence that the energy for the charge-separated BA+HA- state is significantly lower than the corresponding state oil the B-side. It follows that the B-A* and P-A* states are both possible origins for a fast charge separation in PSII.