  We consider cosmological tests of a scalar-vector-tensor gravitational model,
in which the dark energy is included in the total action through a gauge
invariant, electromagnetic type contribution. The ground state of dark energy,
corresponding to a constant potential $V$ is a Bose-Einstein type condensate
with spontaneously broken U(1) symmetry. In another words dark energy appears
as a massive vector field emerging from a superposition of a massless vector
and a scalar field, the latter corresponding to the Goldstone boson. Two
particular cosmological models, corresponding to pure electric and pure
magnetic type potentials, respectively are confronted with Type IA Supernovae
and Hubble parameter data. In the electric case good fit is obtained along a
narrow inclined stripe in the $\Omega _{m}-\Omega _{V}\,$ parameter plane,
which includes the $\Lambda $CDM limit as the best fit. The other points on
this admissible region represent superconducting dark energy as a sum of a
cosmological constant and a time-evolving contribution. In the magnetic case
the cosmological test selects either i) parameter ranges of the superconducting
dark energy allowing for the standard baryonic plus dark matter or ii) a
unified superconducting dark matter and dark energy model, additionally
including only the baryonic sector.
