Represented values
(1) Represented values include: The unit energy consumption (UEC) in kilowatt-hours per year (kWh/yr), battery discharge energy (Ebatt) in watt hours (Wh), 24-hour energy consumption (E24) in watt hours (Wh), maintenance mode power (Pm) in watts (W), standby mode power (Psb) in watts (W), off mode power (Poff) in watts (W), and duration of the charge and maintenance mode test (tcd) in hours (hrs) for all battery chargers other than uninterruptible power supplies (UPSs); and average load adjusted efficiency (Effavg) for UPSs. (2) Units to be tested. (i) The general requirements of 429.11 are applicable to all battery chargers; and (ii) For each basic model of battery chargers other than UPSs, a sample of sufficient size must be randomly selected and tested to ensure that the represented value of UEC is greater than or equal to the higher of: (A) The mean of the sample, where: (B) The upper 97.5-percent confidence limit (UCL) of the true mean divided by 1.05, where: (iii) For each basic model of battery chargers other than UPSs, using the sample from paragraph (a)(2)(ii) of this section, calculate the represented values of each metric (i.e., maintenance mode power (Pm), standby power (Psb), off mode power (Poff), battery discharge energy (Ebatt), 24-hour energy consumption (E24), and duration of the charge and maintenance mode test (tcd)), where the represented value of the metric is: (iv) For each basic model of UPSs, the represented value of Effavg must be calculated using one of the following two methods: (A) A sample of sufficient size must be randomly selected and tested to ensure that the represented value of Effavg is less than or equal to the lower of: