How many solar panels do I need to run a pump?

I plan to buy solar panels of the following configuration:
Sun Force 39110 / 123 watt – 7 amps

To run through an inverter, to produce the 110v I need to run the pump during the day.
The pump is 110v / 7.5 amps / 0.5 HP

My question is, how many solar panels would I need to run the pump?