[RE-wrenches] pumping question

[jay]

HI All,

There are many new PV inverter/VFD 3 phase pumping options out there.

I am looking for any information about how to determine pump performance with standard centrifugal pump running with less than full power. ( IE off of solar)
IE with 5% less watts it produces 50% less water etc.  
I just haven’t been able to figure out how this aspect of the design.

Wondering if anyone out there has any info?

thanks in advance,

jay

peltz power