DC-DC's for Deep Well Pumps[RE-wrenches]

[Allan Sindelar]

John,
We have never had a need for these in PV-direct apps, most of which would be
motor loads, for which an LCB is a better solution. Others may have such
need.

Efficiency must be high, as these are generally used as power supplies for
AC phantom load avoidance of one sort or another, so are typically on 24/7.
The idea of "soft-start lines that can be wired up to a control
contact"--hoo boy, have I died and gone to heaven? Haven't seen that yet;
great idea.

Thanks for checking. Our current options are Solar Converters and BZ
products units through Dankoff, and ICT and a few others through Hutton. I'd
like to know of other options.

Thanks for looking for us all (or something like that that's more correct
syntactically...)

Allan at Pos En

----- Original Message -----
From: "John Raynes" <john at raynes.com>
> OK, I'll do a little digging when I'm back in the office over the
> weekend.  Got a couple more questions first:
>
> Do you want to use them on PV direct as well as battery?  It affects the
> input voltage range.  For battery bank connection, I normally assume the
> DC-DC input voltage should work up to 1.5 X nominal voltage.  For PV
> Direct, I would assume 2X.
>
> What do you feel is the maximum acceptable idle power draw for the
> converter?  Like inverters, most of these devices will draw some current
at
> no load.  To get around this, a lot of models have soft-start lines that
> can be wired up to a control contact, like on an LCB.  But others don't
> have this option, so it's probably best to look at it both ways.
>
> I took a quick look at some sites selling Wilmore converters.  The ones I
> saw look like full-fledged instruments, not components.  Really nice, but
> you're probably paying for a lot more product than you need.  I think we
> can dig up some better options among fully UL-listed components.  Most
will
> need to be part of some larger system enclosure,  preferably metal for
heat
> sinking. And they'll need their own fusing and/or disconnect.  But that
> shouldn't be a problem if it's designed in to a system.

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