View all text of Subpart B [§ 429.10 - § 429.76]
§ 429.39 - Battery chargers.
(a) Determination of represented value. Manufacturers must determine represented values, which include certified ratings, for each basic model of battery charger in accordance with the following sampling provisions.
(1) Represented values include: The unit energy consumption (UEC) in kilowatt-hours per year (kWh/yr), battery discharge energy (E
(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:
and, x(B) The upper 97.5-percent confidence limit (UCL) of the true mean divided by 1.05, where:
and x(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 (P
(iv) For each basic model of UPSs, the represented value of Eff
(A) A sample of sufficient size must be randomly selected and tested to ensure that the represented value of Eff
(1) The mean of the sample, where:
and, x(2) The lower 97.5-percent confidence limit (LCL) of the true mean divided by 0.95, where:
and x(B) The represented value of Eff
(b) Certification reports. (1) The requirements of § 429.12 are applicable to all battery chargers.
(2) Pursuant to § 429.12(b)(13), a certification report must include the following product-specific information for all battery chargers other than UPSs: The nameplate battery voltage of the test battery in volts (V), the nameplate battery charge capacity of the test battery in ampere-hours (Ah), and the nameplate battery energy capacity of the test battery in watt-hours (Wh). A certification report must also include the represented values, as determined in paragraph (a) of this section for the maintenance mode power (P
(3) Pursuant to § 429.12(b)(13), a certification report must include the following product-specific information for all battery chargers other than UPSs: The manufacturer and model of the test battery, and the manufacturer and model, when applicable, of the external power supply.
(4) Pursuant to § 429.12(b)(13), a certification report must include the following product-specific information for all UPSs: Supported input dependency mode(s); active power in watts (W); apparent power in volt-amperes (VA); rated input and output voltages in volts (V); efficiencies at 25 percent, 50 percent, 75 percent and 100 percent of the reference test load; and average load adjusted efficiency of the lowest and highest input dependency modes.