[ThePair]

So...as to this charger. Is it in parallel with the TM system? Series? How would it be installed?

For efficiency it seems like it should be in parallel with the TM charger, although you'd need separate wiring to the TV to do so. If there weren't inefficiencies (or if they're not big enough) it almost seems like you could do something in series, connecting this at the bargeman on the TV and then into the TM bargeman as well (an in-line current boost?) although, again, it would then be running the current through two chargers, which seems like a less than ideal situation, although the installation would be simplicity itself.

I really don't know enough about this stuff...