I agree with the comments re: the 225AH house battery bank being insufficient for most cruising boats these days.
1. You never want to cycle the batteries below about 50% state-of-charge (SOC). That gives you 112.5AH available from a fully charged battery bank.
2. Your batteries will almost never
be fully charged, except immediately after you leave the dock
having been plugged in for a couple of days.
3. On a cruising boat, most batteries cycle between 50% and 80% SOC. So, you're really only using about 30% of the rated capacity of the batteries. That gives you a realistic 67.5AH to use between charges.
Your daily consumption
will very likely be more than that.
To replace 67.5AH into your batteries starting from a 50% SOC will take about 80AH from your generator/battery charger, allowing for approx. 20% loss in charging
That's why you want the largest charger you can power from a small portable generator. The Honda EU2000i is an excellent and popular choice, but it can't power a charger much larger than about 70-75 amps output. If you had this setup, you'd need to charge the batteries for about an hour and a half to go from 50% SOC to 80% SOC.
And this is just for the 225AH battery setup you now have.