| 摘要 |
The present invention relates to a small photovoltaic power generation system for a household which uses a small solar cell module as a photovoltaic power generator, has high capacity and excellent safety, enables a user to use energy for a long time as a lithium iron secondary battery is used as an energy storage device, and can extend a lifespan of the energy storage device to be used for a long time. The small photovoltaic power generation system for a household includes: a night power supply unit which supplies commercial power supplied at night; a solar cell unit which is formed to be portable, concentrate sunlight, converts the sunlight into electric energy, and supplies the electric energy; an energy storage device unit which charges the system with the electric energy, supplied from the solar cell unit, or commercial power, supplied from a night power supply unit, to correspond to a charge control signal input from the outside, and supplies the stored electric energy to the outside to correspond to a discharge control signal input from the outside; an inverter which relieves DC electric energy of the energy storage device unit, converts the DC electric energy into AC electric energy, and supplies the AC electric energy ; and a control device which has predetermined charging time and discharging time, outputs a charge request signal to the energy storage device unit during the charging time, and outputs a discharge request signal to the energy storage device unit during the discharging time. Accordingly, the small photovoltaic power generation system generates energy by using only sunlight without additional power supply from the outside and thus can be installed in an easy manner. Operation time and a lifespan of the small photovoltaic power generation system are extended as the lithium iron secondary battery with high efficiency functions as a storage means for storing electric energy generated from sunlight. Therefore, the small photovoltaic power generation system has excellent economic efficiency without high costs for power and maintenance. |
