100a charger needs a big generator-more than a Honda 2000. Also, except for the PowerMax 100a units the others are not power-factor corrected, so they need a bigger 120v circuit--20a CB and 12 wire. The OEM will have a 15a CB and 14 wire.
You can't just run an extension 120v to your new converter location if the converter is not PF corrected and it is over 60amps (DC) (Needs the 12 wire.)
I have a 100a PowerMax deck mounted up by the batteries (but it is PF corrected so only a 15a CB needed) and it takes my Honda 3000 to run it. Procedure is to fire up the Honda first with Eco off, plug in the 100 amper, wait a minute, then turn Eco on. Otherwise, the cold Honda will conk out as soon as the 100 amper is turned on.