Grundfos SQFlex Submersible Pumps

Grab a Grundfos Submersible Solar Pump at The Solar Store!

Grundfos is the brand you turn to for a solar-powered submersible water pump when you want peace of mind knowing your operation will continue running smoothly for the long haul. The company brings more than 75 years of experience in producing dependable pumps, and the SQFlex series is purpose-built for solar and renewable energy water systems. 

Every Grundfos submersible solar pump drops into any well casing 3” or larger. You connect these right into your solar panel array without a battery bank required. You can even connect the AC side to a generator or the grid for backup, because downtime isn’t an option in many cases.

You’ll gain access to more than 10 distinct pumps to choose from. Most are centrifugal for higher flow rates in shallower wells. But Grundfos also makes submersible solar pumps powered by helical rotors when you need to reach as deep as 820 feet at a lower GPM.

From 3 GPM residential models to 85 GPM pumps for commercial agriculture, there’s something for everyone here at The Solar Store. The common theme is every submersible solar pump Grundfos makes is built with a permanent magnet brushless motor, ceramic and tungsten carbide bearings, stainless steel construction, and integrated dry-run protection. That’s what makes these the #1 choice for rugged applications where you can’t afford mishaps.

Here at The Solar Store we also stock the full range of CU200 and CU202 controllers, IO interface boxes, and splice kits to complete your purchase. We’re proud to be known as the #1 choice for all things solar water pumping. Shop now and see what catches your eye or get in touch for personalized support! 

Frequently asked questions

Are Grundfos submersible pumps good?

We carry a lot of solar-powered pumps here at The Solar Store, but this is the manufacturer we steer customers towards first. Grundfos is the world’s largest pump manufacturer and the SQFlex line is tailor-made for off-grid water projects. The build quality, motor technology, and reliability out in the field are all second to none. 

What voltage is a Grundfos solar pump?

Grundfos submersible solar pumps work within a range of 30V to 300V DC depending on the model. You’ll size your panel array to match the pump. Reach out to our customer service team if you want help navigating this. 

Which solar submersible pump is best for my needs?

There are a few moving pieces - well depth, flow rate, budget, etc. Our advice is to connect with our customer service team here at The Solar Store for a personalized recommendation on the right Grundfos solar well pump. In general, though, you’ll want one of the centrifugal pumps for moderate depths and higher flow rates. The helical rotor models are a better fit for deeper wells, but the trade-off is flow rate. 

What is the life expectancy of a Grundfos pump?

We’ve seen these pumps last 15+ years with proper installation and maintenance. They just don’t have that many moving pieces that can wear out, and Grundfos really goes above and beyond in terms of craftsmanship and engineering to ensure longevity. 

Why is Grundfos so expensive?

Simple - you get what you pay for with a Grundfos submersible solar pump. These provide multi-source power flexibility, exceptional build quality, and peace of mind. 

What is the strongest solar water pump Grundfos makes?

The 77 SQF-3 works at 85 GPM if you need a solar water pump for livestock operations or agricultural irrigation.