Solar-powered motorized window treatment

A motorized treatment configured to be mounted to a structure, the motorized treatment comprising:

• a treatment assembly comprising a covering material that extends from a top end to a bottom end, the treatment assembly further comprising a bottom bar attached to the bottom end of the covering material;
• at least one solar cell;
• a motor drive unit comprising a motor configured to adjust a present position of the bottom bar;
• and
• at least one control circuit, the at least one control circuit configured to:
• control the motor drive unit to adjust the present position of the bottom bar to a plurality of positions;
• determine magnitudes of power received by the at least one solar cell at associated positions of the plurality of positions at associated times;
• store the magnitudes of power in memory with the associated positions and the associated times;
• and
• control the present position of the bottom bar to one of the associated positions of the plurality of positions based on the associated magnitudes of power stored with the associated positions and the associated times.