KASman

Yes, a lot to think about. Thats why I came here to get some advice.
I wonder how accurate the 6000 cycles on the Lithium Ions is? How many cycles if you cycle between say 90% and 40%.  10000 cycles on 1200 Watts would be 12000 kWh, which is what say R12000 worth of Eskom, so I lost R3000 compared to Eskom? That seems liveable. If I got even better 12000 cycles would be breakeven on the batteries? Or am I miles and miles off on my figures? 
 
edit: The pool pump I want to get is the Zodiac Flopro VS which can be programmed to increase power for a cleaning cycle to run the creepy, and run on much lower wattage (motor speed) the rest of the time. It has a very programmable control unit. You can have four different times of day on your choice of motor rpm and therefore watts being consummed. Its also a more efficient motor in the first place. It is not for solar specifically.