Patent ID: 6046400
Filing Date: 2000-04-04
Classification: H02J,H02S,Y02E,Y10S

Abstract:
A power supply system, comprising: a plurality of photovoltaic cells for converting radiant energy into direct current;a battery, said photovoltaic cells being electrically connected to said battery for supplying direct current to recharge said battery;a power inverter for converting direct current into alternating current, said photovoltaic cells being electrically connected to said power inverter to supply direct current to said power inverter;an electrical receptacle, said power inverter being electrically connected to said electrical receptacle to supply alternating current to said electrical receptacle;a second alternating current supply being electrically connected to said electrical receptacle for supplying alternating current to said electrical receptacle;a switch electrically connecting said power inverter to said electrical receptacle in a first mode and electrically connecting said second alternating current supply to said electrical receptacle in a second mode;a voltage comparator being electrically connected to said photovoltaic cells, said voltage comparator comparing a predetermined reference voltage to the direct current supply by said photovoltaic cells;said voltage comparator being electrically connected to said switch;said switch being in said first mode when said voltage comparator detects the direct current supply from said photovoltaic cells is greater than said predetermined reference voltage; andsaid switch being in said second mode when said voltage comparator detects the direct current supply from said photovoltaic cells is less than said predetermined reference voltage.