I need help, new to the forum from today. I have a 3,3kw SRNE Inverter connected to 8 X 290watt panels connected in series and 24 volt lithium iron 100ah battery. My problem: the warmer it gets from about 11:30 To 2:30 the volts increases substantially and amps decreases to almost zero, results in almost nil to very little KW input to the system. 

What is the load on your system when you observe this?
The kW load from the panels will only show if you are actually using the load. If your system is idle and you have a base load of 100 or 200W, then that is all you will see as production from the panels.