Hi trickedy,
The ECU will not work as you hope.
I have to manually limit the amps being drawn by the inverter. It's easy as pie to know when. Just monitor the voltage at the dash cigarette lighter. If it drops below 13.2, it is a concern. If it goes to 12.9, you are most likely drawing too many amps.
I use the inverter to run the electric hot water heater. That draws approximately 120 amps.
Again, since your battery bank is relatively small, if you don't take it much below 50% state of charge this may not be an issue. (or it may be a big one--some folks do charge six volt pairs at pretty high amperages).
I got around the issue of different chemistries by having all batteries including the chassis to be identical.
trickedyj wrote:
I think the ECU control does a decent job at limiting alternator output to something with in it's own duty cycle.
