DrewE, you are correct as to how it works.
I do have the converter charger wired to both the battery bank and to the DC fuse panel. The inverter is wired to the battery bank.
For the "supply" test, needed when the batteries are too full to accept all the charger's rated amps so you can test doing straight recharging, I have the RV on inverter whole house (so it can run the microwave). I have the converter only plugged into the generator.
So now I can turn on the MW, get that -127 amps showing on the Trimetric, and then plug in the converter to the gen. Now the Trimetric says -52, so I know the converter is doing 75 amps.
Yes, there is some voltage drop along the converter-battery paths, but not much.
My problem with "output watts" is that I thought the converter's set voltage is what counts, never mind what the battery voltage has got to by whenever during the test. To me, the output is from the converter and it is set at 14.x and stays at that no matter what.
The charger's voltage has to be higher than the batteries' or no amps. The charger is doing the work, so to me it is the charger's voltage that should count in the output watts figure.
It is true that the output watts and so the input required from the gen drops off as amps taper during the absorption stage. But during the constant amps bulk stage earlier, I thought output watts stayed the same.
If not, then as battery voltage rises during the bulk stage, input required from the gen would go up along with battery voltage.
I will do more "observations" during the next test run doing battery charging (not supply) and see what happens in real life.
