Mr. Sharkey via EV wrote:
I'm thinking 3 of these on my ElecTrak 36v pack
While it's not a strict apples-to-apples comparison, I use a 45 amp Todd
"Power Source" switching power supply as the on-board charger on my E20
ET. The three 15 amp internal modules were changed from parallel to
series connection. No problems after fifteen years of operation.
Todd was an earlier version. I think Iota was formed from ex-Todd
employees, if I remember correctly.
Note that a 13.6 volt output per power supply will only result in a
nominal output voltage of 40.8, which isn't ultimately going to be
healthy for the batteries (depending on your cell chemistry).
The Iota has a telephone jack with a jumper wire plugged into it. The
jumper sets the output to 13.6v (and there's a trimpot inside, if you
want to tweak it).
If you unplug that jumper, the voltage goes up to 14.7v. That would more
fully charge a lead-acid battery. But it is too high to leave it on this
voltage indefinitely. The Iota definitely does not shut off by itself!
Iota made a "Smart" module that plugged into this jack. Basically, it
opened the jumper to charge to 14.7v. After about an hour at 14.7v, it
shorted the jumper again to drop to the safe 13.6v "float" voltage.
Lee Hart
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In the mood for a great New Year's story? Here is my
abridged version of Charles Dickens classic "The Chimes"
<http://www.sunrise-ev.com/poems/thechimes.htm>
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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