Abstract: This paper established the mathematical model of a hybrid system, which includes solar photovoltaic array, fuel cells, electrolytic cell, batteries.Each module was simulated through matlab/simulink, and the output power characteristics, as well as the expense problem were simulated under the conditions that the photovoltaic power was 1kw, and battery, fuel cell with different power allocation, namely, 0 W/1000 W, 200 W/800 W, 500 W/500 W, 800 W/200 W, 1000 W/0 W.Finally, through experimental research, a conclusion can be drawn that when battery was 200 W, and fuel cells was 800 W, the whole efficiency and the cost were superior to other schemes.