[RE-wrenches] Remote AC well pump

[Ray]

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 <jerrysgarage01 at gmail.com 
> <mailto:jerrysgarage01 at 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.Michaelson at gmail.com <mailto:Howie.Michaelson at 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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> -- 
>
>
>
> Mac Lewis
>
> *
>
> "Yo solo sé que no sé nada." -Sócrates
>
> *
>
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