Specific gravity readings from my bank?

First, know thatI am not an FLA man, I have  AGMs.
So those numbers are telling you the relative charge of your cells.  You need to look up the SG reading you should get for your mdel and date of production, some are in the  10265 range and others ~1.280....  there are a  couple of very recent threads on these batteries, like in the last few days.  do a search , lots of relevant info there for you ...

the 1.25 cells may need an EQ charge.  Are you getting to FLOAT frequently?

what do you have for a charge controller and solar capacity?
Are you familiar with the procedures to do a good charge followed by an EQ?

Here is your Data sheet, http://www.trojanbattery.com/pdf/datasheets/SCS225_Trojan_Data_Sheets.pdf
Also  http://www.trojanbattery.com/product/scs225/
Assume you have a 12 V system,   you will need enough solar to have at least 26A at 16.2 Volts,  to do an EQ and possibly more for Temp Compensation depending on your areas ambient temperature.

I would think that the strict use of a generator to keep batteries charged would be quite hard on them. Possibly drained pretty heavily at times....for three years. We don't know the recharge rate at this time.

Checking SG at the start of the day...before they are fully charged....may yield useful data. These SG figures don't look too bad to me. Though various manufacturers employ various SG parameters.