Energy Management Optimization of a PV system Connected to a Local Grid in an Office Building. The office Building to be studied is in Campus Sescelades, Tarragona. During the whole year is necessary to provide heating, cool and electricity. The Building is Connected to the local grid of heating/cooling and electricity. Is expected the new development of a PV System on the roof of the Building. The PV System will cover (totally or partially) the electric demand, assuming to cover also the needs of heating and cooling with heat pumps. The PV System will be provided with electricity storage too. The idea is to study the system with TRNSYS and optimize it both terms of heating/cooling and electricity.