| 摘要 |
PROBLEM TO BE SOLVED: To allow a system to have optimum operation efficiency by operating it with only a single source of power, which has a higher voltage value when a voltage ratio of a solar battery to a storage battery is a specified value or above. SOLUTION: In this system, voltage sensors 25, 26 for detecting the output voltage of a solar battery 1 and a battery 2 respectively are installed at the output sides of these batteries, in order to compare the DC voltages of these batteries, thereby making active use of the output power from both of them. Under the condition that the output power from both of the batteries be used, when the voltage ratio of the output voltage of the solar battery 1 to that of the storage battery 2 is a specified value or higher, the output power of the solar battery 1 is used priorly, and when the voltage ratio becomes the specified value or below, the output power of the storage battery 2 is used. When this method, the system can exhibit an optimum operation efficiency. |
