  We study the conductivity of granular superconductors in the weak coupling
insulating regime. We show that it is governed by the hopping of either
electrons or Cooper pairs depending on the relation between the superconducting
gap and the charging energy of a single granule. Local superconducting pairing
plays an important role in both cases. In particular, in the case of the
transport via electron hopping the superconducting gap suppresses the inelastic
cotunneling processes. We determine transport characteristics of an array in
different regimes and construct the transport phase diagram.
