Method for solar power energy management with intelligent selection of operating modes

A method for solar power energy management with intelligent selection of operating modes, comprising steps of:

• creating a power level range classification to classify power energy generated by a solar cell and reserved energy stored in a rechargeable battery into multiple power level ranges, wherein the power energy of the solar cell is classified into four power level ranges represented by “poor”, “insufficient”, “moderate” and “sufficient”, and the reserved power of the rechargeable battery is classified into three power level ranges represented by “low”, “medium” and “high”;
• detecting and determining if the power energy of the solar cell is higher than a rated power required by a load;
• if the power energy of the solar cell is higher than the rated power of the load, executing an intelligent power supply procedure to simultaneously supply power to the load from the solar cell and charge the rechargeable battery with a residual power of the solar cell;
• if the power energy of the solar cell is not higher than the rated power of the load, determining if the power energy of the solar cell falls within the “insufficient” power level range;
• if the power energy of the solar cell is in the “insufficient” power level range, determining if the power energy of the solar cell is sufficient to supply the rated power of the load, if positive, supplying all power energy of the solar cell to the load, and if negative, supplying all power energy of the solar cell to the rechargeable battery;
• and
• if the power energy of the solar cell is in the “poor” power level range, detecting the reserved power of the rechargeable battery and determining if the reserved power is sufficient to supply the rated power of the load, if the reserved power is sufficient to supply the rechargeable battery, supplying the reserved power of the rechargeable battery to the load by pulse width modulation.