AN ANALYSIS ON THE PV AND BATTERY INSTALLATION CONNECTING THE COMMERCIAL AND RESIDENTIAL SECTORS

摘要

Recently, the progress of ICT such as cloud computing and bidirectional communication system is very marvellous. The battery system such as lithium ion, NAS and redox flow batteries is also being made a great progress. Therefore, in this study, we would like to analyze the PV (Photovoltaic cell) and battery installation connecting the commercial and residential (household) sectors under various capacity conditions. We also would like to discuss the present problems and future subjects of this activity.The special environment brought by the much preferable purchased price of PV electricity by FIT makes quite large distortion to the decision making of investments for the installation of PV and battery. We need to reconsider desirable and sustainable FIT system, particularly to solar, more carefully.For the installation of PV and battery connecting the commercial and residential (household) sectors, the cost reduction will be quite essential. Of these, especially, the cost reduction of various batteries would play a crucial role. Thus, technology innovation of battery will be desired earnestly from now on.The "absolutely zero" purchased electricity at any time is often pursued as an achievable target. But the realization of this target is not reasonable. Instead of this strict target, the balancing between the purchased electricity and the sold PV electricity ("net zero") would be pursued.