Many ev owners have been looking for a way to charge 12 volt d.c.
batteries from their high voltage vehicle battery bank.
The following is from IOTA Engineering regarding using the DLS battery chargers from
a high voltage direct current source:
From: Jeff Young [mailto:jyoung@iotaengineering.com]
Sent: Wednesday, January 17, 2007 2:26 PM
Subject: Re: question [DC operation of DLS units]
The DLS-45 and DLS-55 will not produce full output power with less than 130Vdc on the input and
will be limited to an output voltage of 13.6Vdc; an increase of the input voltage (to 136Vdc) would be
required to attain full output power with the DV (dual voltage) jack installed.
The DLS-45 and DLS-55 will operate at less than 130Vdc, but at a limited capability. At 96Vdc,
the output will remain in regulation up to ~½ Adc. Above ~½ Adc load, the output voltage will decrease
linearly until the load current reaches ~1Adc (Vout = ~10Vdc). Above 1Adc, the output should maintain
an output voltage of 9 -10Vdc.
The DLS-30 (Series M) also has limited operation at lower input voltages. At 96Vdc, the Series M can
sustain normal float voltages out to ~20Adc.
Above 20Adc, the output voltage decreases linearly to ~10Vdc at 30A output.
Jeff Young - Power Products Engineer
jyoung@iotaengineering.com
IOTA Engineering, L.L.C.
Tel - 520-294-3292
Fax - 520-573-2934
As of today, 1/24/07, John Kehm told me on the telephone that the highest d.c. input voltage
for the DLS-30M, DLS-45 and DLS-55 is 190 volt d.c.
