Looking good! :)
I need an ammeter to tell me when to shut down the generator when I have done my 50-90 or 50-80 whatever. I find that at 90% SOC a 220AH bank at 14.5v will accept about 10 amps, so when my amps taper down to 5 amps per battery, I stop. (So at 20 amps for my four 6s)
I don't know any other way to tell that. Of course you can use an AH counter, but that has an ammeter anyway. Smk says to just get the batts to 14.4 and let the gen run for another hour, which is a rule of thumb, but I like to know more exactly.
I have learned with mine that if you leave it at 14.8 till amps get down to nothing much (so near 100%) before you drop to 13.x for your Float, that the SG will be up at baseline, and you will hardly ever have to do an "overcharge" (You can't do that with a 13.8v converter, the SG never gets that high, and a regular three stager will drop to 13.x too soon. The trick is to leave it up at 14.8 till it is done and then lower it.
You can mark some handy voltages around the knob while the charger is disconnected from the battery, which makes life easier when connected and you want to change voltages.
