The charging rules are the same... If you batteries are down to 50% charge state then it will take 17-20AMPS DC charge for each battery from your solar panels if you want them to be back up to their 90% charge state in a three hour time frame. This will happen in around three hours time if you have that much DC Current going into them...
But since you only get 5-6 amps out of each 120WATT panel then you are not going to get them recharged in three hours and can only hope the high sun is there for several more hours during the day...
Where everyone gets saved is their panels start charging good probably around 9-10AM each morning and go all day to 6-7PM in the evening. this will top off your batteries BIG TIME...
My case is going to be different however as I know I will draining 20-22AMPS DC current from my batteries starting at 6PM to 10PM everyday running all my Ham Radio and momabears toys... I know I can get them recharged to 90% using the generator so that what I am going to do...
It could be for me that I may only have to run the generator for the first hour of my recharge cycle each morning until I get past the very high 52-55AMPS of DC Current demand when I first start my charging cycle. It starts tapering down after 15-20 minutes - then perhaps switching over to solar panel after the first hour I can get my batteries going to the full 90% charge state while still in the high sun all day...
As you can see if different for everybody haha...
Roy Ken