  In the residential sector, energy micro-generation and its intelligent
management have been creating novel energy market models, considering new
concepts of energy use and distribution, in which the prosumer has an active
role in the energy generation and its self-consumption. The configuration of
the solar photovoltaic system with a battery energy storage in Portugal is
unclear in the technical, energetic and mostly in the economical point of view.
The energy generation and consumption management, jointly with the battery
operation, have a great influence in the profitability value of the
configuration. The present work evaluates different photovoltaic configurations
with and without energy storage for the normal low voltage C consumer profile,
for a contracted power of 3.45 kVA, to evaluate the cost-effectiveness of the
systems, framed in the regulation in force in Portugal, the decree-law
153/2014, which promotes the micro-generation and self-consumption. The
analysis consists of three different geographical locations in the country,
considering distinct electric tariffs. These are relevant parameters in the
choice of the configuration, concluding that although the solar photovoltaic
system by itself is already economical presently, its integration with battery
energy storage is not in most of the configurations, however it is already
possible to find profitable PV and battery configurations, considering all the
most relevant criteria, and supported by good energy management.
