Buying an efficient pump is much cheaper than enlarging a power system. Ordinary AC pumps use induction motors, which require 5 to 10 times their running current to start. This places far less demand on inverter capacity, and greatly reduces wire size requirements. They will not burn out from excessive voltage drop. General Rules for Installing a Surface Pump Pumps are better at pushing water than sucking it.
Excessive suction causes cavitation.
This is when vapor bubbles form, and then implode inside the pump. This produces loud noise and excessive pump wear. Minimize friction by using intake pipe of 1 to 2-inch size. Avoid humps in the intake pipe. They can trap air pockets that restrict flow.