[ShrimpBurrito]

I've got charging concepts of series and parallel mixed up.

Bill, I agree with your original assessment.

Along those same lines, taking the one-converter approach, one thing to recognize is that since the discharge rates will be different, one of the batteries won't be charging initially (as Bill describes). So, for example, if one is at 80% and the other at 40%, you won't be able to top off the 80% one for some time, depending on the charge current. Dual chargers would fix that.

Also, one thing you'd want to consider is the charge output of the converter in the TM. You don't say what model TM you have, but if it's an older model, the max charge output in those converters (like mine) is about 6 amps. You would be running your genny a long time to charge 2 batteries with so little current.

Dave