In supramolecular reaction center models, the lifetime of the charge-separated state depends on many factors. However, little attention has been paid to the redox potential of the species that lie between the donor and acceptor in the final charge separated state. Here, we report on a series of self-assembled aluminum porphyrin-based triads that provide a unique opportunity to study the influence of the porphyrin redox potential independently of other factors. The triads, BTMPA-AlPor-C60, were constructed by linking the fullerene (C60) and bis(3,4,5-trimethoxyphenyl)aniline (BTMPA) to the aluminum(III) porphyrin. The redox potentials of aluminum(III) tetraphenylporphyrin (AlPor) are tuned by substitution of phenyl, 3,4,5-trifluorophenyl, or 2,3,4,5,6-pentafluorophenyl groups in its meso positions. The C60 and BTMPA units are bound axially to opposite faces of the porphyrin plane via covalent and coordination bonds, respectively. Excitation of all of the triads results in sequential electron transfer that generates the identical final charge separated state, BTMPA•+-AlPor-C60•-, which lies energetically 1.50 eV above the ground state. Despite the fact that the radical pair is identical in all of the triads, the lifetime of the radical pair was found to be very different in each of the different systems, that is, 1240, 740 and 56 ns for the pentafluorophenyl, trifluorophenyl, and phenyl substituted systems, respectively. These results imply that the charge recombination is an activated process that depends on the midpoint potential of the central aluminum(III) porphyrin.