Depending on the utility and the time of day when charging occurs a power management system may be integrated into the design. This system will manage the power consumption at any given time to be sure that it does not create excessive demand charge from the utility. These systems can be integrated with a power storage system to bridge the power requirements. ChargeKnowledgy will determine the most cost-effective method of managing demand charges. Power storage systems or the less expensive alternative, arranging the charging schedules is to avoid charging during the demand charge window.