  We consider bio-inspired ring systems as photovoltaic circuits to explore the
advantage of `optical ratcheting', a process whereby the arrangement of coupled
optical dipoles enables delocalised excitonic states that are protected against
radiative decay whilst permitting the absorption of further photons. We explore
how the performance of a ratcheting antenna scales with system size when
excitons are incoherently or coherently extracted from the antenna to an
associated trap site. In both instances we also move to the polaron frame in
order to more closely model realistic systems where the coupling to vibrational
modes can generally be assumed to be strong. We find a multifaceted and nuanced
dependence of the predicted performance on an interplay between geometrical
arrangement, extraction mechanism, and vibrational coupling strength. Certain
regimes support substantial performance improvements in the power extracted per
site.
