Messages

1

Pumps, Wells, Tanks, Controls / Re: New Pump for off grid or battery backup.

« on: September 22, 2021, 11:51:22 AM »

Regarding long thin wire...is the idea here to reduce the current carrying capacity of the conductor?  Would an inline resistor
do the same?

Looking at the SQ3-105, https://product-selection.grundfos.com/id/products/sq/sqc-3/sq-3-105-96510210?tab=variant-specifications , it says Power input P1 2.54kw, P3 1.74kw.  Do you know what P3 would refer to? 

I'm guessing my inverter would need to supply 2.54kw.

Thanks for your awesome help!

2

Pumps, Wells, Tanks, Controls / New Pump for off grid or battery backup.

« on: September 22, 2021, 10:33:21 AM »

We are currently grid tied and have a 330 foot deep well with a static level about 40 feet down.

We would like to eventually be off grid (solar and microhydro), but as a stepping stone in that direction
have a small battery bank and solar panel set up to run the well pump when power is out.

My first look into power needs indicate a very high starting current for the well pump, and I had
read that a variable speed? variable frequency? pump has lower starting current.

What do you think may be a good solution here?