The paper analyses the harmonic characteristics of a microgrid, which is composed of a PV inverter, a battery charger and several household devices, including linear loads and different types of power-electronic based loads. Combinations of these loads (load scenarios) are measured both under interconnected and islanded conditions. The results are compared with regard to voltage and current harmonic magnitudes as well as the network harmonic impedance. Some conclusions towards the suitability of the current standardization framework are derived.