With No solar and generator I would not fear running the PD-9260-14.8, that has the 14.8v absorptoin voltage instead of the regular PD 14.4v.
Getting to 100% is important for any lead acid battery but especially so AGM's. I would not recommend going more than 7 deep cycles without getting to that desirable endgoal, and after 7 cycles it might require significantly more time at absorption voltage for amps to taper to 0.5% of capacity(20hr rate)
A hundred watt solar panel has the time to hold the batteries at absorption voltage, silently, after the generator has gotten the batts to ~90%, and can greatly extend battery lifespan.
