  We consider the problem of constructing cosmological solutions of the
Einstein-Maxwell equations that contain multiple charged black holes. By
considering the field equations as a set of constraint and evolution equations,
we construct exact initial data for N charged black holes on a hypersphere.
This corresponds to the maximum of expansion of a cosmological solution, and
provides sufficient information for a unique evolution. We then consider the
specific example of a universe that contains eight charged black holes, and
show that the existence of non-zero electric charge reduces the scale of the
cosmological region of the space. These solutions generalize the
Majumdar-Papapetrou solutions away from the extremal limit of charged black
holes, and provide what we believe to be some of the first relativistic
calculations of the effects of electric charge on cosmological backreaction.
