Solar Panel as power supply for multiple borehole pumps
That's not a single 200 W panel, I hope. 1 hp = 746 W, so 5 \$\times\$ 3 hp is good for 11.2 kW, if that 3 hp is the consumed electric power (most likely). If it's delivered mechanical power you'll have to divide by the pump's efficiency, in practice that could be doubling.  

If your solar farm can supply the power there's no reason why the pumps should not be connected together.