24 to 48V converters [RE-wrenches]

[Windy Dankoff, Dankoff Solar]

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Dear John, Chris and others,

We have supplied 24-48V converters to several of our ETAPUMP 
customers. After months of intensive use there have been NO problems 
with it, so we don't hesitate now to offer this option to people who 
desire ETAPUMP and are committed to a 24V system, but either can't 
get enough lift or flow from our 24V models, or the wire size is a 
killer.

We don't see any inherent problems with this converter application 
because ETAPUMP is a "gentle" load. It uses a brushless 3-phase motor 
with a variable frequency soft-start controller. It draws only a 
little more than the running power while accelerating the motor up to 
speed (a 15 second period). The converter we use is oversized, rated 
to handle the startup on a continuous basis.

In the field of solar pumping, there will be application gaps to fill 
for years to come. We will apply the occasional "bandaid" when it 
solves a problem in a reliable and economical manner.

Thanks for the recognition.

Windy Dankoff

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