Photovoltaic power generations have been accepted and spread widely. Various innovative power conditioning systems including inverters have been also studied. In domestic utilization, the actual application of such solar panels are almost installed on top of the roof of the detached house. Some residents living in the apartment house, however, have fairly strong desires to contribute for energy saving due to natural energy generation. The generating power in such case is fairly reduced, so the system construction should balance the reduced power. Thus, it is necessary to improve the construction toward simple one. In this paper, in order to give a reply, simple and concise power conditioners (PCS), especially inverter waveforms are examined. Considering fairly reduced generating power and narrow space of installation, the system constructions should be compact. The circuits which gratifies their wishes are presented and examined the effectiveness.