Soft Start Well Pump

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eesiason
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My RE system: Off-Grid 48ea Sunmodule SW240, sunmodule 240W Modules, 18 SolarWorld 290W modules, 2ea Radian 8000W GS8048 48V 120/240VAC Inverter, 4ea Flexmax 80, MATE 3s, Hub 10, 2kw Wind, two 15kw ecogen on a manual bypass. Everything is redundant.
Location: 648 Southbridge Rd., Warren MA
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Soft Start Well Pump

Post by eesiason » Sat Jan 19, 2019 4:19 am

Hi, who out there has a soft-start well pump? Grundfos has a ready to drop in the well set of soft start pumps advertised as "generator and inverter friendly". Any other options out there? Soft-start controller for a "regular" pump? Thoughts?

blackswan555
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My RE system: Other peoples, VFX "E" versions, FLA`s, Generators.
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Re: Soft Start Well Pump

Post by blackswan555 » Sat Jan 19, 2019 4:39 am

https://en.wikipedia.org/wiki/Variable-frequency_drive run a 20 to 30% oversized 3ph pump and turn it down, Best of the lot, ( its what the "inverter" pumps are

Tim
My comments are based on my experience and research, They are not endorsed or checked by Outback.I am an independent British electrician living in Spain, So please take this into account when reading /acting on my post`s.

JRHill
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My RE system: VFX 3648, FM80, 3k panels, Mate3, FNDC (retired), 8ea L16 mixed. Wonderful wife.

Re: Soft Start Well Pump

Post by JRHill » Sat Jan 19, 2019 11:44 am

Been running an 11SQF-2 for ~9 years. very reliable and durable and, yeah, pricey. Pretty cool that you can throw 30-300vdc or 90-240vav at it; it just figures it out and runs. I've been running it mostly on 48vdc but have the Grundfos transfer switch that the dc is disconnected to allow 120vac or other operation just by plugging in the pigtail. You don't need the expensive controller unless you want it for the display. Just run it off a std pressure switch.

I started to type in the details. ergh; way to much and potentially misleading. But if and when this pump dies I will replace it in kind. Its a tough unit.

eesiason
Forum Whiz
Posts: 48
Joined: Fri Oct 12, 2012 9:40 am
My RE system: Off-Grid 48ea Sunmodule SW240, sunmodule 240W Modules, 18 SolarWorld 290W modules, 2ea Radian 8000W GS8048 48V 120/240VAC Inverter, 4ea Flexmax 80, MATE 3s, Hub 10, 2kw Wind, two 15kw ecogen on a manual bypass. Everything is redundant.
Location: 648 Southbridge Rd., Warren MA
Contact:

Re: Soft Start Well Pump

Post by eesiason » Sun Jan 27, 2019 10:02 am

For what it's worth, I went with a Grundfos 10SQ07-200 3/4 HP Pump. ($669 on Amazon) It is a thing of pure beauty to watch the display on the Mate gradually ramp up to 1600 watts instead of spiking briefly to around 10,000 before settling back down to around 2,000. I'm thinking the generator will appreciate that...

I am going to get one of the soft starters for my wood furnace though. The induction motor on that has a healthy spike on startup too, though not nearly as bad as the old pump.

JRHill
Forum Czar
Posts: 907
Joined: Thu Feb 17, 2011 11:12 am
My RE system: VFX 3648, FM80, 3k panels, Mate3, FNDC (retired), 8ea L16 mixed. Wonderful wife.

Re: Soft Start Well Pump

Post by JRHill » Sun Jan 27, 2019 6:31 pm

We don't use that much water volume. Our pump ramps up to 750 watts and sits at that rate, regardless of the pressure. Its higher than that if we plug it in to line voltage but that's rare (but really handy).

I believe you'll be happy with the.choice

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