It all comes down to how deep the well is, and how much water you need
to pump. For lower head, lower flow rates, just go with the SQF line.
If you need more water, then start looking into the other options.
Just as with off grid homes, you need to carefully define the
parameters: depth to water, depth to bottom of well, well diamater at
top and down hole, the actual tested flow rate of the well, flow rate
of the proposed pump, gal per day required summer, GPD winter.
This is also one of the rare cases where array tracking might make
sense. In the summer you can start pumping much earlier and get much
more water over the day. Its also easier on a low flow well to pump a
little bit through out the day, than have a big pump hit it hard a few
times a day.
Ray Walters
Remote Solar
303 505-8760
On 7/26/21 10:02 PM, Mac Lewis wrote:
Hi Howie,
There are many options for this equipment now. If the well pump motor
is already installed, it may limit your options. If it hasn't, then
there are a lot of good solar pumps available. Grundfos SQ Flex is
solid from our experience.
There are also drives that can take high voltage solar DC and drive a
pump. These drives are kind of like an inverter and a high voltage
MPPT device. They optimize the PV and try to drive the pump at the
highest rate possible with the available wattage by varying the motor
frequency (no battery necessary). Despite all of these features, they
aren't very expensive. ABB makes them as do many others but you need
to have someone solid helping you verify that the pump you want to
drive is compatible and what you want to do makes sense.
https://new.abb.com/drives/low-voltage-ac/machinery/ABB-solar-pump-drives
<https://new.abb.com/drives/low-voltage-ac/machinery/ABB-solar-pump-drives>
I'd call ABB and try to get to a smart sperson to help with this if
you go this route. These are more set up for 3 phase motors than
single or split phase. However, its been a while since I went through
the literature.
Good luck with this
On Mon, Jul 26, 2021 at 6:14 PM Jerry Shafer <jerrysgarag...@gmail.com
<mailto:jerrysgarag...@gmail.com>> wrote:
DC Directgrunfus sq flex they have depth, gmp and voltage options
Jerry
On Mon, Jul 26, 2021, 3:53 PM Howie Michaelson
<howie.michael...@gmail.com <mailto:howie.michael...@gmail.com>>
wrote:
Hi all,
I have done no remote well pump system design. I have a
potential client looking for help driving a remote AC deep
well pump with PV. My first reaction is too say in order to do
that, they will need an inverter and batteries as well as PV
and charge controller. But it occurred to me to ask if there
are simpler ways to accomplish this. I don't know any more
about the situation, but wanted to see if anyone has idea how
to potentially accomplish this without so much infrastructure
before I had any more conversations with them.
Thanks,
Howie Michaelson
Sun Catcher
NABCEP Certified Solar PV Installer™
Solar Electric & Heat Pumps Systems Sales & Service
802-272-0004
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