Required Solar Power Agricultural Water Pump

Omar:

I think your pumping problem is orders of magnitude greater than what is normally handled on this forum. You need to better identify what you have and then seek professional help.

I suspect that your current pumps are 415V, 50 hertz. They most likely have a combined output somewhere near 500 gpm from the 300-400 foot range, although this would be reduced if the local voltage sags, or if they are wired to a single phase.
Pumping 20 hours a day, you are looking at something in the 500,000-600,000 gallons a day range. (roughly 1900-2300 cubic meters a day).

In addition to better defining your current system, you need to define what it is you expect to achieve with the new system.  Let the professionals develop a solution for you, rather than guessing at what might solve your problem.

If you tell them you want solar, that is what they will do. If you leave all options open, they could come up with recommendations from rain water catchment to switching over to dry land rice.
Ken

I may be able to help Omar,
we farm off grid and irrigate about a 1,000 tropical trees. Our solar pump operates off two trackers and we store in two 8,000 gallon tanks. We drip irrigate rather than flood irrigate.....can either be contacted tru the forum or directly at raysubtropical @ roadrunner.net....