The topic of these speciality solar pump kits comes up from time to time, but I don't know of any members that have invested in them. Generally they are DC motor powered pumps that connect directly to a solar panel, this allows the pump to run at varying speeds depending on how much light is hitting the panel, and does not have to deal with power loss converting to AC, etc.
Ike
p.s. there are some of these listed on ebay at the moment, price is nearly $1,500 for the smallest pump, this does not include the solar panel or wiring, specs say minimum panel output needed is 720 watts (max panel 1,000)