Battery charging based on cost and life

A battery charging system, comprising:

• a battery;
• an electric vehicle, the battery coupled to a propulsion motor configured to propel the electric vehicle;
• a charging circuit to charge the battery;
• a timer circuit outputting a plurality of timing signals corresponding to at least a first time period and a second time period, wherein said first time period precedes said second time period;
• a charging cost circuit, wherein said charging cost circuit controls operation of said charging circuit and receives said plurality of timing signals from said timer circuit, wherein said charging cost circuit continuously monitors an instantaneous charging cost rate, wherein said charging cost circuit initiates operation of said charging circuit during said first time period whenever said instantaneous charging cost rate is below a threshold cost rate, pauses operation of said charging circuit during said first time period whenever said instantaneous charging cost rate is above said threshold cost rate, resumes operation of said battery charging circuit during said first time period whenever said instantaneous charging cost rate is less than said threshold cost rate and terminates operation of said charging circuit during said first time period when said battery reaches a first energy stored level, and wherein said charging cost circuit initiates operation of said charging circuit during said second time period regardless of said instantaneous charging cost rate and continues operation of said charging circuit until said battery reaches a second energy stored level or operation is disrupted by a system user, wherein said second energy stored level is greater than said first energy stored level.