Hi! I have been consumed with this problem and haven't been able to find a solution. I am looking to build a rather inexpensive solar irrigation pump that can draw water out from depths of about 500 ft. I wanna combine this pump with drip irrigation. I'd like to use it for my farm in India. Looked into buying one but companies selling such pumps are super expensive. Anyone here have any experience with solar irrigation submersible pumps? Any help would be greatly appreciated.