Numbers , I need numbers !!! lol
the more the better,
But as a starting guess, you are using more than your panels are providing, hence your gen is running to make up for it, the answer to that is more panels or cut your consumption, Cutting your consumption being the first ( and easiest/ cheapest)
The first step towards doing that is to know what you are using and for how long, So here comes the numbers bit
What we need to know on the load side,
daily loads and for how long they are used, the best way to find that is to look at the "rating plate/stamp" on each appliance X how long it is used per day, EG kettle, 230v 10 a / 2300w , used for approx 6 mins a time, 10 times per day = 1hr X 2300w = 2.3kwh per day, please include everything you can think of, down to phone chargers, modems and heating pumps, If you can not find the plate, list the item anyway, we can estimate.
And on the Solar side
What size ( in watts or volts & amps) or model your panels are, What part of the world you are in ? what size / type are you batteries ? ( and if applicable, their service history )
Give us enough numbers from the above and we should be able to figure if it is you or your system at fault
Have a good one
My comments are based on my experience and research, They are not endorsed or checked by Outback.I am an independent British electrician living in Spain, So please take this into account when reading /acting on my post`s.