So what you are saying is you are running an AC pump with the inverter.
Your Pump motor is an 80w unit. At peak Pv your panel will provide about 90% conversion in direct sunlight. Charge controller uses some power, inverter uses some power, etc.. you are quite a ways below supply power needed to run an 80w pump and keep battery charged.
I run 2 80w panels and 4 300ah batts in series-parallel to run a 60w (DC) motor. For daytime aerator operation it's best to run a 24v DC pump on a 18v panel and wire direct from panel to pump.
