The Characteristics of a Photovoltaic System in a Cold District. (Second report)

Last year, we developed a measurement system which can measure solar radiation, the electric power of a solar cell, etc, by microcomputer, and showed the effectiveness of a photovoltaic system in a cold district by the data collected from a solar cell of 35 Wp output. In this paper, we report 1. Comparison of the characteristics of a 480 Wp output solar cell which contains batteries with those of a 35 Wp output solar cell. 2. The characteristics of the solar cell for different resistance loads. 3. Studies of the security and the economy of a photovoltaic system as an independent power source and the suitable capacity of the battery using the operating data of the 480 Wp output solar cell