Need a Deep Well Pump Solution [RE-wrenches]

[Ray Walters]

Allan;

I have been the regional distributor for Solamotor Jack pumps for about 5
years now. They are an excellent choice for deep, weak recharge wells.
Reliability is better than the Sunrise, there is no controller and the
motor is above ground, making brush maintenance easy. Effeciency is better
than AC, less than the Sunrise.We've got a couple of Solamotors in at over
500 ft., one on a very marginal well (dry hole,50 gpday)on a DC timer. The
pumps are run on flex SDR pipe with a fiberglass sucker rod. It rolls out
similar to the Sunrise, we have a roller attachment and winch for pulling
these types of pumps professionally (read NOT by hand).
 I've got 4 years of pumping comparisons between AC, the Sunrise, & the
Solamotor in array direct & battery mode, all in the 350 to 400 ft range.
I've made a comparison chart based on this experience. The bottom line is
regardless of the hype, we both already know there is no magic bullet, just
compromises based on each specific application.  Contact me off list if you
want more info. 

Ray

At 05:56 PM 5/14/02 -0600, you wrote:
>Wrenches,
>Here's a tough one. If any of you have solved this, or can suggest a good
>option, please do so.
>
>We put in a system last year for a good client. 24V, PS2524 (our last), 850W
>PV, SB50, etc. The water system was a SunRise 5218 with SC1B battery
>converter and Booster Pump. The power system has worked well; the water
>system hasn't. The SunRise pump has failed three times, and neither we nor
>the customer want to continue using it.
>
>The well is 500' deep, with weak (1+ gpm) flow at 330-350'. The SunRise was
>originally set at 300', which the client knew was our recommended limit for
>the hand installation method. When the pump started drawing air, we lowered
>it to 350', which worked, but means a crew of 3-4 to pull it out, plus 2 1/2
>hrs of RT travel time.
>
>Dankoff has fixed or replaced the pump already (it's still under warranty).
>They will give us about 55% refund or credit on another pump. We looked at
>using the ETApump, and the client would like to, but the lift limit at 24V
>(rather than 48V) is about 200-250', which won't cut it. We could use a
>24-48V step-up converter, but don't want to until it has a proven track
>record in this application. The client can't afford an array-direct PV array
>to run the pump. A conversion to a 48V home system is likewise pretty
>expensive, as it would mean adding two more modules (10 now), dropping from
>12 L16s to 8 @ 48V, changing SB50 to SB3048, and various other changes.
>
>The only alternative I can see is a standard AC sub. The Grundfos SQ won't
>work at an estimated 350-400' of lift, as that would require the 5SQ-320,
>which has a 1.40 HP motor, almost certainly too much for a PS2524 with a
>T240. This leaves a standard 3/4 HP Grundfos 5S07-18 or equivalent with
>T240.
>
>One alternative is a bigger 240VAC pump to run directly off of his backup
>generator, which is a Subaru 5.1 kW at 7,000'. The problem with a
>bigger/faster pump (to minimize run time) is the slow recharge rate of the
>well--it would quickly run dry.
>
>Who has a better idea?
>
>Allan at Positive Energy
>
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