We have one that is pumping around 4gal minute from close to 400' The deeper you go the more panels you need and the higher the cost. We put this pump in about 5 yrs ago and when it was all said and done cost us just shy of 10grand, with the solar panels being the major cost. It was well worth the cost and is very low maitence for us. It replaced a 14' windmill in a mountain clearing that pretty well had to be rebuilt yearly from the wind damage. We are looking to replace several other windmills that we depend on to fill storage tanks and supply major amounts of our pasture water with solar pumps as we can afford them.