[RE-wrenches] Pump power

Tue Sep 22 15:58:41 EDT 2020

Hmm, The SQF and SQ series pumps are soft start!   
Dave Angelini
Offgrid Solar
"we go where powerlines
don't"
http://members.sti.net/offgridsolar/ [1]
e-mail offgridsolar at sti.net
[2]
text 209 813 0060

On Tue, 22 Sep 2020 12:46:46 -0700, Kent Osterberg 
wrote:   The Grundfos 16SQF-10 will give you 12 to 13 gpm at 230 feet. But
that is working at the upper edge of this pump's lift rating. Not sure that
meets your definition of most of the 20 gpm.

 The maximum output current,
50 A, of the inverter system equals the locked rotor amps of a 2 HP motor.
Without a soft start you aren't going to reliably start the 2HP pump while
running other loads. Even the 1.5 HP is problematic.

 Kent Osterberg
 Blue
Mountain Solar

 On 9/22/2020 12:13 PM, Jerry Shafer wrote:  Go look at
grudfus SQFlex they can go pv direct or AC in Jerry  
  On Tue, Sep 22,
2020, 12:10 PM frenergy  wrote: Wrenchers,

 We're upgrading an off-grid
water system. Dynamic head 
 while pumping at 20 GPM is 150 ft from water
level to wellhead and then 
 its 85 ft vertical to storage tank so 235 ft
total head to open 
 discharge. We would like to get most of that 20 GPM,
we need to know if 
 there is personal experience with starting a 1.5 or 2
HP, 240 vac, 2 
 wire submersible pump against that kind of head with an
Outback Flex 
 Power2 (2 X VFXR3648A-01 inverters).

 The FP2 will also be
powering standard off-grid loads. 
 There is plenty of battery behind the
inverters. If a soft-start 
 solution is required, some specifics would be
great. Grundfos doesn't 
 seem to have an option for these requirements,
solar-direct is not an 
 option at this location.

 Thanks,

 Bill

Feather River Solar Electric
 Bill Battagin, Owner
 4291 Nelson St.

Taylorsville, CA 95983
 530.284.7849
 CA Lic 874049
 www.frenergy.net [4]

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